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Chapter 2. United States of America Aeronautical Contractions

Section 1. Decode

EXPLANATION OF CODES Contraction Definition Usage AC altocumulus NWS GEN − Indicates general aeronautical usage. AC assistant chief GEN NWS − Indicates National Weather Service and aero- ACA artic control area ATC ACARS communication addressing ICAO nautical weather usage. and reporting system ACAS airborne collision avoidance system ICAO ATC − Indicates Air Traffic Control usage. ACC area control center ATC ACC altocumulus castellanus NWS ICAO − Indicates International Civil Aviation ACCID notification of aircraft accident ATC Organization usage. International messages should ACCT account GEN use these. ACCUM accumulate GEN ACDNT accident GEN METAR/TAF − Indicates ICAO weather usage. ACDO Air Carrier District Office GEN ACE Central Region, FAA GEN ACES access GEN ACFT aircraft ICAO A ACID aircraft identification ATC ACK acknowledge GEN ACL altimeter check location ATC Contraction Definition Usage ACLD above clouds GEN +FC tornado/water spout METAR ACLS automatic carrier landing system GEN A absolute (temperature) NWS ACLT accelerate GEN A Alaskan Standard Time (time groups NWS ACM air combat maneuvers ATC only) ACN aircraft classification number ICAO A Amber GEN ACN all concerned notified GEN A arctic (air mass) NWS ACNOT accident notice GEN A/A air to air ATC ACP acceptance (message type ICAO A/C approach control ATC designator) A/G air to ground ICAO ACP area command post GEN A/H already had ATC ACPT accept GEN AAC Alaskan Air Command GEN ACPY accompany GEN AAD Assigned altitude deviation ICAO ACR air carrier GEN AADC approach and departure control ATC ACRBT acrobatic ATC AAF Army Air Field GEN ACRS across GEN AAITVL arrival aircraft interval ATC ACSL standing lenticular altocumulus NWS AAL Above aerodrome level ICAO ACT active or activated or activity ICAO AAL Alaskan Region, FAA GEN ACT air combat training ATC AAP Advise if able to proceed ATC ACT Technical Center, FAA GEN AAR airport arrival rate ATC ACTG acting GEN AARTE airport acceptance rate ATC ACTV active GEN AATM at all times GEN ACTVT activate GEN AAWF Auxiliary Aviation Weather Facility NWS ACW aircraft control and warning GEN AAWTA Advise at what time able ICAO ACYC Anticyclonic NWS AB Airborne ATC AD Aerodrome ICAO ABBR Abbreviate GEN ADA advisory area ATC ABCST automatic broadcast GEN ADAP Airport Development Aid Program GEN ABD Aboard GEN ADC Aerodrome chart ICAO ABI Advance boundary information ICAO ADCF Air Defense Control Facility GEN ABLCHG airborne launching ATC ADCON advise or issue instructions to all GEN ABM abeam ICAO concerned ABN aerodrome beacon ICAO ADCUS advise customs GEN ABND abandon GEN ADDN addition GEN ABNDT abundant GEN ADE Air Defense Emergency GEN ABNML abnormal GEN ADF automatic direction finder GEN ABT about GEN ADFAP automatic direction finder approach ATC ABV above ICAO ADIZ air defense identification zone GEN AC Advisory Circular GEN ADJ adjacent ICAO

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Contraction Definition Usage Contraction Definition Usage ADL aggregate demand list ATC AFOVRN Air Force overrun 1000−ft standard MIL ADLO Air Defense Liaison Officer GEN approach lighting system ADLY arrival delay ATC AFRCC Air Force Rescue Coordination GEN ADMAP advise by air mail as soon as possible GEN Center ADMIN administration GEN AFREP Air Force Representative to the FAA GEN ADMIR administrator GEN AFRT air freight GEN ADMIS aircraft departing at (number of ATC AFS aeronautical fixed service GEN minutes) intervals AFSS Automated Flight Service Station GEN ADMIV administrative GEN AFT after GEN ADNL TFC additional traffic is ATC AFTN Aeronautical Fixed GEN ADNOK advise if not correct ATC Telecommunications Network ADO Aerodrome office (specify service) ICAO AFTN afternoon GEN ADO Airport District Office GEN AG air ground ATC ADP automatic data processing GEN AGA aerodromes, air routes and ground ICAO ADPE automatic data processing equipment GEN aids ADPS automatic data processing systems GEN AGACS automatic ground air/ground GEN ADQT adequate GEN communication system ADR airport departure rate ATC A−GEAR arresting gear GEN ADR advisory route ATC AGL above ground level ICAO ADRDE advise reason for delay ATC AGL Great Lakes Region, FAA GEN ADRNDCK adirondack NWS AGN again GEN ADRT alternate departure route ATC AGR agree GEN ADS address GEN AGRMT agreement GEN ADS Air Defense Sector GEN AHD ahead GEN ADS automatic dependent surveillance ICAO AI arrival approved request for IFR ATC ADS−B Automatic Dependent Surveillance− ICAO flight Broadcast AIA advise if able ATC ADSPN advise disposition GEN AIATSC all international air traffic switching GEN ADSU automatic dependent surveillance ICAO centers unit AIC Aeronautical Information Circular GEN ADV advise NWS AID airport information desk GEN ADVALT allotment advice GEN AIDC Air traffic services inter−facility data ICAO ADVC advice GEN communication ADVCTN advection NWS AIFP activate IFR flight plan ATC ADVN advance GEN AILS automatic instrument landing system GEN ADVY advisory NWS AIM Airman’s Information Manual GEN ADVZY advisory ATC AIP Aeronautical Information Publication ATC ADW air defense warning GEN AIP aeronautical information publications GEN ADZ advise ICAO (In General) ADZAR advise arrival ATC AIRAC aeronautical information regulation GEN ADZI advise intentions ATC and control ADZOF advise this office GEN AIRCOMNET Air Force Communications Network GEN ADZY advisory ATC AIREP air report GEN ADZY advisory GEN AIRFL air refueling ATC AEA Eastern Region, FAA GEN AIRMET Airmen’s Meteorological GEN AEM aircraft and engine mechanic GEN Information AENG airways engineer GEN AIROPNET air operations network GEN AER approach end GEN AIS aeronautical information service GEN AERO aeronautical GEN AIS aeronautical information specialist GEN AES ICAO AIS airport in sight GEN AEU Europe, Africa, and Middle East GEN AL all (when used as prefix) GEN Office, FAA AL annual leave GEN AEVAC air evacuation ATC AL/(−−−) at least (altitude) ATC AEW airborne early warning GEN ALA alighting area GEN AFB Air Force Base GEN ALACFO all air carrier field offices GEN AFC area forecast center NWS ALADLO all air defense liaison officers in GEN AFCT affect GEN service area AFDK after dark NWS ALAFFO all technical operations GEN AFIL filed flight plan in the air GEN ALANO all accident notice offices GEN AFIO authorization for interceptor ATC ALARTC all air route traffic control centers in GEN operations service area AFIRM affirmative GEN ALAT all air traffic service personnel in GEN AFIS aerodrome flight information service ICAO service area AFJ Air Force Jet ATC ALATAS all air traffic (area) supervisors in GEN AFM affirmative ICAO service area AFNEA Air Force NOTAM Exchange Area GEN ALATF all air traffic field facilities GEN AFNEO Air Force NOTAM Exchange Office GEN ALATFO all air traffic field offices GEN

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Contraction Definition Usage Contraction Definition Usage ALCKT all offices having send−receive tele- GEN AMPLTD amplitude NWS typewriter service on circuit AMRF amended route of flight ATC ALCS/C all air traffic combined station/ GEN AMS aeronautical mobile service GEN centers in service area AMS air mass NWS ALCS/T All air traffic combined station/ GEN AMS American Meteorological Society NWS towers in service area AMSL above mean sea level GEN ALCT attempt to locate GEN AMSS aeronautical mobile satellite service ICAO ALDA Air Line Dispatchers Association GEN AMT Amount GEN ALERFA alert phase code (alerting service) ATC AMVER Automated Mutual−Assistance ATC ALF aloft NWS Vessel Rescue System ALFAA all FAA field offices and personnel GEN ANC Aeronautical chart 1:500 000 ICAO ALFAB all FAA offices on NADIN GEN (followed by name/title) ALFSFO all flight standards field offices GEN ANCPT anticipate GEN ALFSS all flight service stations in service GEN ANCS Aeronautical navigation chart small ICAO area scale (followed by name/title scale) ALG along GEN ANE New England Region, FAA GEN ALGHNY Allegheny NWS ANF air navigation facility GEN ALIATSC all international aeronautical tele- GEN ANG Air National Guard GEN communication switching centers ANLYS Analysis NWS ALIFO all international field offices GEN ANM Northwest Mountain Region, FAA GEN ALIFSS all international flight service GEN ANMS Automatic Network Management GEN stations in service area System ALNMT alignment GEN ANNC announce GEN ALNOT alert notice GEN ANR Advanced Navigation Routes ATC ALP airport layout plan GEN ANRA air navigation radio aids GEN ALPA Air Line Pilots Association GEN ANS answer GEN ALQDS all quadrants NWS ANT antenna GEN ALR alerting ICAO AO1 ASOS automated observation METAR ALRAFAC all ATC facilities in service GEN without precipitation discriminator area (rain/snow) ALRGN all regional/service area offices GEN AO2 ASOS automated observation with NWS ALS approach light system ICAO precipitation discriminator (rain/ ALSEC all sectors NWS snow) ALSF−1 standard 2400’ high−intensity GEN AOA at or above ATC approach lighting system with AOAF at or after ATC sequenced flashers (Category I AOB at or below ATC configuration) AOBF at or before ATC ALSF−2 standard 2400’ high−intensity GEN AOC aerodrome obstacle chart (followed ICAO approach lighting system with by type & name/title) sequenced flashers (Category II AOC airport operating certificate GEN configuration) AOCP aircraft out of commission for parts GEN ALSTG altimeter setting GEN AOE airport of entry GEN ALT altitude ICAO AOPA Aircraft Owners and Pilots GEN ALTA Alberta NWS Association ALTM altimeter GEN AP airport ICAO ALTN alternate or alternating ICAO AP anomalous propagation ATC ALTN alternate (aerodrome) ICAO APAP approach path alignment panel GEN ALTPT alternate airport GEN APAPI Abbreviated precision approach path ICAO ALTRV altitude reservation GEN indicator ALTWR all ATC towers in service area GEN APC area positive control ATC ALUTN Aleutian NWS APCH approach ICAO ALWF actual wind factor NWS APDC Aircraft parking/docking chart ICAO AM ante meridiem NWS (followed by name/title) AMA area minimum altitude ICAO APL airport lights GEN AMB ambiguity GEN APLCN Appalachian NWS AMC Air Mobility Command ATC APN Apron ICAO AMC Mike Monroney Aeronautical Center, GEN APNT appoint GEN FAA APP approach control or approach control ICAO AMCL amended clearance ATC office AMD amend / amended forecast GEN APPA advise present position and altitude ATC AMDT amendment ICAO APPR appear GEN AMECH account mechanical GEN APR airports program report GEN AMGR airport manager GEN APREQ approval request GEN AMIS aircraft movement information GEN APRNT apparent GEN services APROP appropriate GEN AMOS Automatic Meteorological Observing GEN APRX approximate GEN System APS airborne pulse search radar GEN AMP Amplifier or amplify GEN APSG after passing ICAO

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Contraction Definition Usage Contraction Definition Usage APV approve GEN ASSOC associate GEN APVL approval GEN ASST assistant GEN AR Atlantic Route ATC ASW Southwest Region, FAA GEN ARAC area airports checked ATC ATA actual time of arrival ATC ARAC Army radar approach control facility GEN ATA Air Transport Association of GEN ARAD altitude radial ATC America ARB Air Reserve Base GEN ATAM at and maintain ATC ARC Area chart ICAO ATAR above transmitted as received GEN ARCP air refueling control point ATC ATC air traffic control ICAO AREP air refueling egress point ATC ATCA Air Traffic Control Association GEN AREX air refueling exit ATC ATCA ATC advises ATC ARFF aircraft rescue and fire fighting ATC ATCAA ATC assigned airspace ATC ARFFOK airport rescue and fire fighting alarm ATC ATCBI ATC beacon interrogator GEN checked ATCC ATC clears ATC ARFOR area forecast GEN ATCF ATC facility GEN ARINC Aeronautical Radio, Incorporated GEN ATCH attach GEN ARIP air refueling initial point ATC ATCOR ATC operations representative GEN ARL Aerial ATC ATCR ATC requests ATC ARLO Army Liaison Officer GEN ATCRBS ATC system GEN ARMET forecast upper wind and temperature GEN ATCS ATC specialist GEN at specified points ATCSCC David J. Hurley ATC Systems GEN ARML Airmail GEN Command Center ARND Around GEN ATCT Airport Traffic Control Tower GEN ARNG Arrange GEN ATD actual time of departure ATC ARNOT area notice GEN ATFC account traffic GEN ARO air traffic services reporting office GEN ATFM air traffic flow management ICAO ARO Airport Reservations Office GEN ATIS automatic terminal information ICAO ARP aerodrome reference point ICAO service ARP airport reference point GEN ATLC Atlantic NWS ARP airport reservation position GEN ATM air traffic management ICAO ARP air−report GEN ATM air traffic manager ATC ARPT Airport GEN ATM authentication maneuver ATC ARQ automatic error correction equipment GEN ATMT attempt GEN ARR arrival or arrive ICAO ATMTC attempt to contact ATC ARS Air Rescue Service (USAF) GEN ATN Aeronautical Telecommunications ICAO ARS special air−report GEN Network ARSA airport radar service area ATC ATND attend GEN ARSR air route surveillance radar GEN ATO aeronautical telecommunications GEN ARST arresting ICAO operator ARTC air route traffic control GEN ATO Air Traffic Organization GEN ARTCC Air Route Traffic Control Center GEN ATOG allowable take−off gross weight GEN ARTS Automated Radar Terminal Systems GEN ATP actual time of penetration ATC ARU Airborne Radar Unit GEN ATP air traffic procedures GEN ARU Airspace Reservation Unit GEN ATPAC Air Traffic Procedures Advisory GEN (Canadian) Committee ARUNK arrival unknown ATC ATR air transport rating GEN AS altostratus NWS ATREP air traffic representative GEN AS/R automatic send/receive GEN ATRLS actual time of release ATC ASAP as soon as possible GEN ATSCCP Air Traffic Service Contingency GEN ASC ascent to GEN Command Post ASCU automatic scanning control unit GEN ATT American Telephone and Telegraph GEN ASD airspace docket GEN Company ASDA accelerate−stop distance available ICAO ATTM at this time GEN ASDE airport surface detection equipment GEN ATTN attention GEN ASE Altimetry system error ICAO AT−VASIS Abbreviated T visual approach slope ICAO ASGN assign GEN indicator system ASHTAM volcanic ash advisory ICAO ATZ aerodrome traffic zone ICAO ASI altimeter setting indicator GEN AUGRA authority granted GEN ASIP airspace flight inspection pilot GEN AURBO Aurora Borealis NWS ASL above sea level GEN AUREQ authority is requested GEN ASMD assumed ATC AUTH authority GEN ASND ascend GEN AUTH authorized or authorization ICAO ASO Southern Region, FAA GEN AUTO automatic ICAO ASOS automated surface observing system NWS AUTOB automatic weather reporting system GEN ASP airport system plan GEN AUW all up weight (gross weight) GEN ASP airspace GEN AUX auxiliary GEN ASPH asphalt ICAO AUZ authorize GEN ASR airport surveillance radar GEN

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Contraction Definition Usage Contraction Definition Usage AVBL available or availability ICAO BDRY boundary ICAO AVFP activate VFR flight plan ATC BDSLD bids solicited GEN AVFPNO pilot failed to activate VFR/DVFR ATC BECMG becoming (expected between 2 digit TAF flight plan beginning hour and 2 digit ending AVG average GEN hour) AVGAS aviation gasoline ICAO BFDK before dark NWS AVN aviation GEN BFR before GEN AWA advise when able ATC BGN began or begin GEN AWANS Aviation Weather and NOTAM GEN BGND begin or beginning descent ATC System BHND behind GEN AWBE automatic weather broadcast GEN BIFR before encountering IFR conditions ATC equipment BINOVC breaks in overcast NWS AWE advise when established ATC BKN broken METAR AWL all weather landing ATC BL blowing METAR AWOS automatic weather observing/ GEN BLD build NWS reporting system BLDG building ICAO AWP aviation weather processors NWS BLDU blowing dust METAR AWP Western−Pacific Region, FAA GEN BLDUP buildup NWS AWS air weather service (USAF) GEN BLKHLS Black Hills NWS AWT await or awaiting GEN BLKT blanket NWS AWX account weather GEN BLN balloon GEN AWY airway ICAO BLO below GEN AXPS air express GEN BLO below clouds ICAO AZM azimuth ICAO BLSA blowing sand METAR AZRAN azimuth and range data ATC BLSN blowing snow METAR BLW below ICAO BLX block ATC BLZD blizzard NWS BMBR bomber GEN BMS basic meteorological services NWS B BND bound GEN BNDRY boundary NWS BNTH beneath GEN BOMB bombing GEN BOVC base of overcast NWS Contraction Definition Usage BPOC before proceeding on course ATC B base leg ATC BPS bytes per second GEN B beginning of precipitation (time in NWS BPT beginning procedure turn ATC minutes) (weather reports only) BR Bahama Route ATC B Bering Standard Time (time groups NWS BR branch GEN only) BR mist METAR B blue GEN BRAF braking action fair GEN B center clearance delivered ATC BRAG braking action good GEN BA braking action ICAO BRAN braking action nil GEN BAC below all clouds ATC BRAP braking action poor GEN BACLIN baroclinic or baroclinic prognosis NWS BRF brief NWS BAFVC bids accepted for the following GEN BRG bearing GEN vacancies BRGT bright GEN BAL balance GEN BRITE bright radar indicator tower GEN BASE cloud base GEN equipment BASOPS Base Operations Office GEN BRK break NWS BATROP barotropic or barotropic prognosis NWS BRKG braking ICAO BC back course GEN BRKHIC breaks in higher overcast NWS BC beginning climb ATC BRKSHR Berkshire NWS BC British Columbia NWS BRM barometer NWS BC patches METAR BS commercial broadcasting station ICAO BCFG fog patches NWS BSAF bids solicited as follows GEN BCH beach NWS BSC bird sweep completed ATC BCKG backing NWS BSHP beginning standard holding ATC BCM back course marker GEN procedure BCM become GEN BSIAP beginning straight-in approach ATC BCN beacon ICAO BSRAP beginning standard range approach ATC BCREQ broadcast requested ATC BSRO begin standard refuel orbit ATC BCST broadcast ICAO BT back taxiing ATC BCSTN broadcast station GEN BTL between layers ICAO BDA Bermuda NWS BTN between ICAO BDAT beacon data (digitized) ATC BTR better GEN BDR border GEN BTWN between NWS

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Contraction Definition Usage Contraction Definition Usage BUEC backup emergency communication GEN CCC Regional Communications Control GEN BUIC backup interceptor control ATC Center BUL bulletin GEN CCD City (or County) Civil Defense Dir- GEN BUR bureau GEN ector at____ BUS business GEN CCFP collaborative convective forecast ATC BY blowing spray (weather reports only) METAR product BYD beyond GEN CCLDS clear of clouds ATC BZR buzzer (radar) GEN CCLKOB counterclockwise orbit ATC CCLKWS counterclockwise NWS CCRU complete crew GEN CCRZ climb and cruise ATC C CCSA Class C surface area ATC CCSL standing lenticular cirrocumulus NWS CCTLR chief controller GEN CCUS cleared Customs GEN Contraction Definition Usage CD candela ICAO C celsius GEN CD civil defense GEN C Central Standard Time (time groups NWS CD clearance delivery GEN only) CDAS Class D airspace ATC C centre (runway ID) ICAO CDC computer display channel GEN C circling (approach and landing ATC CDFNT cold front NWS charts) CDM collaborative decision making ATC C continental (air mass) NWS CDN coordination ICAO C/A Coarse/Acquisition ATC CDO communications duty officer GEN CA clear above (PIREP only) ATC CDSA Class D surface area ATC CAAS Class A Airspace ATC CE communications equipment GEN CAC change to approach control or chan- ATC CEAS Class E airspace ATC ging to approach control CELNAV celestial navigation GEN CAC contact approach control ATC CENGR civil engineer GEN CACT civil air carrier turbojet GEN CENPAC Central North Pacific ATC CADO Chief, Airport District Office GEN CER climb en route ATC CAM Canadian Armed Forces Transport GEN CERAP combined center/RAPCON GEN Command CERT certificate GEN CAN Canada NWS CERTIF certification GEN CANFORCE Canadian Armed Force GEN CESA Class E surface area ATC CANO catalogue number GEN CF change frequency to ICAO CANOT Canadian NOTAM GEN CFA controlled firing area ATC CANR Canadian NORAD Region GEN CFAD composite flight data processing GEN CAO change of appointing office GEN CFADC Canadian Forces Air Defense GEN CAP Civil Air Patrol GEN Command CAP/IS combined approach control/ GEN CFAP cleared for approach ATC international station CFM confirm GEN CAPD climb at pilot s discretion ATC CFM Confirm or I confirm ICAO CAPT captain GEN CFN confine GEN CARA check area airports GEN CFP cold front passage NWS CARF central altitude reservation function GEN CFPL carryover from previous log ATC CARIB Caribbean NWS CFR Code of Federal Regulations GEN CARU Canadian Airspace Reservation Unit GEN CFWSU central flow weather service unit GEN CAS calibrated airspeed ATC CFY clarify GEN CAS collision avoidance system GEN CG Coast Guard GEN CASCDS cascades NWS CGAS Class G airspace ATC CAT category ICAO CGAS Coast Guard Air Station GEN CAT clear air turbulence GEN CGL circling guidance light ICAO CATX climb and cross ATC CGLS Coast Guard LORAN Station GEN CAUFN caution advised until further notice GEN CGSTN congestion GEN CAVOK cloud and visibility OK NWS CH channel ICAO CAVU clear or scattered clouds and NWS CH This is a channel-continuity-check of ICAO visibility greater than ten miles transmission to permit comparison of CAWS common aviation weather subsystem NWS your record of channel- sequence CB cumulonimbus NWS numbers of messages received on the CBAS Class B airspace ATC channel CBMAM cumulonimbus mamma NWS CHAP chapter GEN CBSA Class B surface area ATC CHARC characteristic GEN CC carbon copy GEN CHC chance NWS CC cirrocumulus NWS CHG change GEN CCA continental control area GEN CHGO changing over ATC CCAS Class C airspace ATC CHM chemicals GEN CCC Central Computer Complex GEN CHNL channel GEN

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Contraction Definition Usage Contraction Definition Usage CHOK check okay GEN CNTR center GEN CHOV changeover ATC CNTRL central GEN CHRG charge GEN CNTRLN centerline GEN CHSPK Chesapeake NWS CNVG converge GEN CHTR charter GEN CNVRT convert GEN CI cirrus NWS CNVSN conversion GEN CIC controller in charge GEN CNVTV convective NWS CIDIN common ICAO data interchange net- ICAO CO company GEN work CO county GEN CIFP cancel IFR flight plan ATC COB close of business GEN CIFR cancel IFR clearance previously ATC COC climb on course ATC given COLL collect GEN CIFRR Common IFR Room GEN COM communication ICAO CIG ceiling NWS COMB combine GEN CINCNORAD Commander in Chief, North Americ- GEN COML commercial GEN an Aerospace Defense Command COMLO compass locator GEN CIRNAV circumnavigate ATC COMPR compare GEN CIRNOT circuit notice GEN COMPRT compartment GEN CIRVIS communications instructions for re- ATC CONC concrete ICAO porting vital intelligence sightings CONCA continue calling until ATC CIT near or over large towns ICAO COND condition ICAO CIV civil ICAO CONF confidential GEN CK check ICAO CONFDC confidence NWS CKT circuit GEN CONFIG configuration ATC CL centre line ICAO CONFIGN configuration GEN CL closing station GEN CONR Continental NORAD Region GEN CL course line ATC CONS continuous ICAO CLA clear type of ice formation ICAO CONSO CONSOLAN Facility GEN CLB climb ATC CONSOL consol beacon GEN CLBI climb immediately ATC CONSOLAN low or medium frequency long range GEN CLBN crash locator beacon GEN CLBR calibration ICAO CONST construction ICAO CLD cloud NWS CONT continue(s) or continued ICAO CLG calling ICAO CONTDVD Continental Divide NWS CLKOB clockwise orbit ATC CONTH continue to hold ATC CLKWS clockwise GEN CONTR contract GEN CLN colon GEN CONTRAILS condensation trails NWS CLNC clearance GEN COORD coordinate GEN CLODA closing date GEN COORD Coordinates ICAO CLOTO close this office GEN COP changeover point GEN CLR clears, or cleared to, or clearance ICAO COPCOM Controllers Operations and GEN CLRAP cleared as planned ATC Procedures Committee CLRS clear and smooth NWS COPT completed procedure turn ATC CLSD closed ICAO COR correct or corrected or correction GEN CLST celestial ATC CORAS corridor assignment ATC CLU circuit line up GEN COREQ confirming requisition follows GEN CM centimeter ICAO COT at the coast ICAO CMA comma GEN COV cover ICAO CMB climb to or climbing to ICAO CP circular polarization GEN CMNC commence GEN CPA crash phone activated GEN CMPCT compact GEN CPBL capable GEN CMPL complete or completed or completion ICAO CPD coupled GEN CMPLT complete GEN CPDLC Controller-pilot data link ICAO CMPLX complex GEN communications CMPSN composition GEN CPF complete power failure GEN CMPT component GEN CPL current flight plan ICAO CMS construction maintenance supervisor GEN CPME Calibration performance monitoring GEN CMSN commission GEN equipment CNCL cancel NWS CPN air transport pulse radar navigation GEN CNCNT concurrently GEN aid CNCT connect GEN CPS air transport pulse radar search GEN CNDN Canadian NWS CPTY capacity GEN CNL cancel GEN CRAD composite radar data processing GEN CNLFP cancel flight plan ATC CRAF civil reserve air fleet GEN CNS communications, navigation and sur- ICAO CRC circle GEN veillance CRC Cyclic redundancy check ICAO CNS Consolidated NOTAM System ATC CRCHF crew chief GEN CNSTNT consistent GEN CRLC circulate GEN

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Contraction Definition Usage D CRS course GEN CRT cathode ray tube GEN Contraction Definition Usage CRTFY certify GEN D danger area ICAO CRYPTO cryptographic GEN DA decision altitude ICAO CRZ cruise ICAO DA departure approved ATC CRZAM cruise and maintain ATC DAAR deviation approved as requested ATC CRZWTR cruise well to right ATC DABRK daybreak NWS CS Call sign ICAO DAE district airport engineer GEN CS cirrostratus NWS DAIRE direct altitude and identification GEN CS/C combined station/center GEN readout equipment CS/T combined station/tower GEN DALGT daylight GEN CSATR climb so as to reach ATC DAP do all possible GEN CSATX climb so as to cross ATC DAPD descend at pilot s discretion ATC CSDR consider GEN DASI digital altimeter setting indicator GEN CSDRBL considerable GEN D-ATIS Data link Automatic Terminal Infor- ICAO CSLDT consolidate GEN mation Service CST coast NWS D-ATIS Digital−Automatic Terminal Infor- ATC CTA control area ICAO mation Service CTAF common traffic advisory frequency ATC DB decibel GEN CTAM climb to and maintain ATC DB describe GEN CTAS controlled airspace ATC DBA doing business as GEN CTAX climb to and cross ATC DBASI digital barometer altimeter setting in- GEN CTC contact ICAO dicator CTCC change to center control or changing ATC DBL double GEN to center control DBTF doubtful GEN CTCC contact center control ATC DC direct current GEN CTCEN contact center ATC DCA Defense Communications Agency GEN CTGY category NWS DCAVU clear or scattered clouds and NWS CTL control ICAO visibility greater than ten, remainder CTLA control area GEN of report missing (weather reports CTLB control boundary GEN only) CTLR controller GEN DCD double channel duplex ICAO CTLZ control zone GEN DCF deputy chief GEN CTN caution GEN DCKG docking ICAO CTR control zone ICAO DCLRT decelerate ATC CTRAC common terminal radar approach GEN DCM defense combat maneuvers ATC control DCMSN decommission GEN CTSKLS Catskills NWS DCMT document GEN CU cumulus NWS DCPC Direct controller-pilot ICAO CUF cumuliform ICAO communications CUFRA cumulus fractus NWS DCR decrease GEN CUSNO customs has been notified GEN DCRZ descend to and cruise ATC CUST customs ICAO DCS defense communications system GEN CVFP cancel VFR flight plan ATC DCS double channel simplex GEN CVINO clearance void if not off ATC DCT direct ICAO CVN convene GEN DDM difference in depth of modulation GEN CVR Cockpit voice recorder ICAO DE From (used to precede the call sign ICAO CVR cover GEN of the calling station) CVRS computerized voice reservation ATC DECCO Defense Commercial GEN system Communications Office CW continuous wave ICAO CWM change weight manifest GEN DEF defense GEN CWRC climb well to right of course ATC DEFCON Defense Readiness Conditions GEN CWSU center weather service unit GEN DEG degree ICAO CWTR climb well to right ATC DELPHO deliver by telephone GEN CWY clearway ICAO DEMOL demolition GEN CXA cancel approved arrival ATC DENEB fog dispersal operations ICAO CXD cancel approved departure ATC DEP depart ATC CYC cyclonic NWS DEP departure ICAO CYCLGN cyclogenesis NWS DEPT department GEN CYL cylinder GEN DER departure end of runway ICAO CZM coastal zone management GEN DES descend to or descending to ICAO DESTN destination GEN

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Contraction Definition Usage Contraction Definition Usage DETRESFA Distress Phase Code (Alerting ATC DOD Department of Defense GEN Service) DOE Department of Energy GEN DEV deviation ATC DOLLY data link GEN DEW distant early warning GEN DOM domestic ICAO DEWIZ distant early warning identification GEN DOT Department of Transportation GEN zone DOT-1 Transport One-Secretary of ATC DFCLT difficult GEN Transportation DFDR Digital flight data recorder ICAO DOT-2 Transport Two-Deputy Secretary of ATC DFL daily flight log GEN Transportation DFNT definite GEN DP deep NWS DFRS differs GEN DP dew point temperature ICAO DFTI distance from touchdown indicator GEN DPCR departure procedure ATC DFUS diffuse GEN DPNG deepening NWS DGCGO dangerous cargo GEN DPT depth ICAO DGNL diagonal GEN DPTH depth NWS DGR danger GEN DR dead reckoning ATC DH decision height ICAO DR direct route GEN DI delay indefinite ATC DR low drifting METAR DI departure approval request for IFR ATC DRCT direct GEN flight DRCTN direction GEN DIAM diameter GEN DRDU low drifting dust METAR DIF diffuse ICAO DRFT drift NWS DIR director GEN DRG during ICAO DISABLD disabled GEN DRIR direct readout infrared GEN DISC discontinue GEN DRMS Distance Root Mean Square ATC DISEM disseminate GEN DRR Deployment Readiness Review ATC DIST distance ICAO DRSA low drifting sand METAR DIST district GEN DRSN low drifting snow METAR DISTR distribute GEN DRZL drizzle NWS DIV divert ICAO DS domestic services (island operations) GEN DIV division GEN DS dust storm METAR DKTS Dakotas NWS DSATR descend so as to reach ATC DLA delay or delayed ICAO DSATX descend so as to cross ATC DLAC delay account of ATC DSB double sideband ICAO DLAT delay time ATC DSCNT descent ATC DLC delay clearance or delayed clearance ATC DSGND designated GEN DLIC Data link initiation capability ICAO DSIPT dissipate NWS DLT delete GEN DSN Defense Switching Network GEN DLVR deliver GEN DSND descend ATC DLVY delivery GEN DSNDI descend immediately ATC DLY daily GEN DSNT distant GEN DLY Daily ICAO DSPL display GEN DMAAC Defense Mapping Agency Aerospace GEN DSPLC displace GEN Center DSPN disposition GEN DMAHC Defense Mapping Agency GEN DSPRL dispersal GEN Hydrographic Center DSR desire GEN DME distance measuring equipment ICAO DSRGD disregard GEN DMEG DME-collocated with glide slope GEN DST distort GEN DMEL DME-collocated with localizer GEN DSTC distance GEN DMER DME-tactical air navigation with GEN DSTND destined ATC DME only commissioned DTAM descend to and maintain ATC DMEV DME-collocated with VOR GEN DTAX descend to and cross ATC DMG damage GEN DTE data terminal equipment GEN DMNT dominant GEN DTF data transmission feature GEN DMO Directives Management Officer, FAA GEN DTG date time group GEN DMSH diminish NWS DTHR Displaced runway threshold ICAO DMSTN demonstration GEN DTL detail GEN DNA Defense Nuclear Agency GEN DTLN international dateline NWS DNG danger ICAO DTR data transmission request GEN DNS dense NWS DTRM determine GEN DNSLP downslope NWS DTRT deteriorate NWS DNSTRM downstream NWS DTS Diplomatic Telecommunications Ser- GEN DNWND downwind ATC vice DO Deputy Commander for Operations GEN DTW dual tandem wheels ICAO DO ditto GEN DU widespread dust METAR DOB date of birth GEN DUATS direct user access terminal system GEN DOC Department of Commerce GEN DUC dense upper cloud ICAO DUPE duplicate GEN

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Contraction Definition Usage Contraction Definition Usage DUPE This is a duplicate message (to be ICAO EET estimated elapsed time ICAO used in AFS as a procedure signal) EFA entire field available GEN DUR duration ICAO EFC expect further clearance at ATC DURC during climb ATC EFCT effect GEN DURD during descent ATC EFF effective GEN DURG during GEN EFR expect further routing ATC DURN duration GEN EFTO encrypt for transmission only GEN DV distinguished visitors GEN EG emergency gear GEN DVFR defense VFR GEN EGECON electronic geographic coordinator GEN DVLP develop GEN navigation system D-VOLMET Data link VOLMET ICAO EHA expect higher altitude ATC DVOR doppler VHF omni-directional radio ICAO EHF extremely high frequency (30000 to ICAO range 300000 MHz) DVRG diverge GEN EIT electronic installation technician GEN DVRSN diversion GEN ELAT estimated latitude GEN DVV downward vertical velocity NWS ELBA emergency location beacon - aircraft ICAO DW dual wheels ICAO ELEC electric GEN DWG drawing GEN ELECN electrician GEN DWNDFTS downdrafts NWS ELEV elevate or elevation ICAO DWPNT dew point NWS ELIP elliptical GEN DWRC descend well to right of course ATC ELMT electronic mechanic technician GEN DWTR descend well to right ATC ELNGT elongate NWS DX duplex GEN ELONG estimated longitude GEN DZ drizzle ICAO ELR extra long range ICAO ELSW elsewhere GEN ELT emergency locator GEN E EM emission ICAO EMBD embedded (in cloud layer) ICAO EMBDD embedded NWS EMDO Engineering and Manufacturing GEN Contraction Definition Usage District Office E east or eastern longitude ICAO EMERG emergency ICAO E Eastern Standard Time (time groups NWS EMI electronic maintenance inspector GEN only) EMSU environment meteorological support NWS E ending of precipitation (time in NWS unit minutes) (weather reports only) EMT electronic maintenance technician GEN E equatorial (air mass) NWS ENCTR encounter GEN E/G engine-generator GEN END stop-end (related to RVR) ICAO E/R exchange and repair GEN ENDCE endurance GEN EACLN expect approach clearance ATC ENDG ending GEN EACNL expect approach clearance not later ATC ENE east-north east ICAO than ENERN east-northeastern (weather reports NWS EADIZ entering air defense identification ATC only) zone ENEWD east-northeastward (weather reports NWS EARTS en route automated radar tracking GEN only) system ENG engine ICAO EAS equivalent airspeed ATC ENGR engineer GEN EAT expected approach time ATC ENHNCD enhanced GEN EB eastbound ICAO ENHNCMNT enhancement GEN EBND eastbound GEN ENR en-route ICAO ECA enter control area ATC ENRC En-route chart (followed by name/ ICAO ECAS enter controlled airspace ATC title) ECD except change departure to read ATC ENRT en route GEN ECM electronic counter measures GEN ENTR entire GEN ECMSN electronic counter measure mission ATC EOBT estimated off-block time ICAO ECOM en route communications GEN EOD entered on duty GEN ECR except change route to read ATC EOF expected operations forecast NWS ECSP electronic specialist GEN EP en route penetration ATC EDA early departure authorized GEN EPI expanded position indicator ATC EDC expect departure clearance at ATC EQCRT equipment certified GEN EDCT estimated departure clearance (time) ATC EQPT equipment ICAO EDR expect departure release at ATC EQUIP equipment GEN EEE Error (to be used in AFS as a ICAO ER here ICAO procedure signal) ERAD en route radar (broadband) GEN EEM electronic equipment modification GEN ERMG en route metering ATC EENGR electrical engineer GEN ERSP en route spacing program ATC EEP end exercise point GEN ERY early GEN

2−1−10 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage F ESCAT emergency security control of air GEN traffic Contraction Definition Usage ESE east-south east ICAO ESEC en route secondary radar beacon GEN F Cleared to fix ATC (broadband) F fahrenheit GEN ESERN east-southeastern (weather reports NWS F flight inspection GEN only) FA area forecast NWS ESEWD east-southeastward (weather reports NWS FA fuel advisory ATC only) FA final approach ATC ESNTL essential GEN FA CENTER Aviation Area Forecast Center GEN ESP en route sequencing program ATC FAA Federal Aviation Administration GEN EST estimate or estimation ICAO FAA for an approach to ATC ESTAB establish GEN FAA-1 SafeAir One-Federal Aviation ATC ESV expanded service volume GEN Administration Administrator ET electronic technician GEN FAA-2 SafeAir Two-Federal Aviation Ad- ATC ETA estimated time of arrival GEN ministration Deputy Administrator ETARS en route tracking automatic radar ser- ATC FAAP federal aid to airports program GEN vice FAAR FAA requirements GEN ETC et cetera GEN FAC facilities ICAO ETD estimated time of departure GEN FAC facility GEN ETE estimated time en route GEN FACF facility chief GEN ETFL each thousand foot level ATC FACSFAC Fleet Area Controlled and ATC ETI estimated information ATC Surveillance Facility ETIM elapsed time ATC FAD fuel advisory departure GEN ETO estimated time over significant point ICAO FAF final approach fix ICAO ETOV estimated time over ATC FAFAB FSS assumes flight-plan area and GEN ETP estimated time of penetration ATC Service B ETR eastern test range ATC FAH fahrenheit NWS EU electronic unit GEN FAL facilitation of international air ICAO EUO emergency use only GEN transport EV every ICAO FAM familiar or familiarization GEN EVAC evacuation GEN FAMAE following amendment authorized GEN EVAL evaluate or evaluation GEN effective EVE evening GEN FAP final approach point ICAO EVS electronic voice switching system GEN FAR Federal Aviation Regulations GEN EVT expect vector to ATC FATFL FSS assumes control of tower GEN EXAM examination GEN frequencies and lights EXC except ICAO FAX facsimile GEN EXCH exchange GEN FBO fixed-base operator GEN EXCLD exclude GEN FC funnel cloud METAR EXCLV exclusive GEN FCA frequency change approved ATC EXCP except GEN FCC Federal Communications GEN EXCT execute GEN Commission EXDLVY expedite delivery GEN FCFSS FAA Contract Flight Service Station GEN EXEC executive GEN FCO facility coordination officer GEN EXEC-1 President on board civil aircraft GEN FCRP field condition report ATC EXEC-1F President s family is aboard aircraft GEN FCST forecast GEN EXEC-2 Vice President is aboard civil aircraft GEN FCTA flow control time of arrival ATC EXEC-2F Vice President s family is aboard GEN FCWOS FAA Contract Weather Observing GEN EXER exercise ICAO FDAT flight data GEN EXP expect ICAO FDC Flight Data Center GEN EXPC expect GEN FDDL frequency division data link GEN EXPED expedite GEN FDEP flight data entry and printout ATC EXPHO expedite delivery by telephone GEN FDI Fault Detection and Isolation ATC EXPS express GEN FDIO flight data input/output ATC EXQF expanded quota flow ATC FDIOR flight data input/output repeater ATC EXREP expedite mail reply GEN FDPS Flight data processing system ICAO EXSEC extra section GEN FE flight engineer GEN EXSHI expedite shipment GEN FENKN fuel supply unknown ATC EXTD extend GEN FENTL fuel supply until ATC EXTN extension GEN FEW 1 or 2 octas (eighths) cloud coverage METAR EXTRAP extrapolate NWS FEXHA fuel supply exhausted ATC EXTRM extreme NWS FFC for further clearance ATC EXTSV extensive GEN FFLT familiarization flight GEN

Decode 2−1−11 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage FFMN fixed federal monitoring network GEN FPDI flight path deviation indicator GEN FG fog METAR FPL filed flight plan ICAO FGSB FSS guarding Service B GEN FPL full performance level ATC FI/P flight information (permanent) GEN FPM feet per minute GEN FI/T flight information (temporary) GEN FPN fixed pulse radar navigation aid GEN FIBI filed but impracticable to transmit NWS FPNO flight plan not received GEN FIC Flight Information Center GEN FPP from present position ATC FICON field condition GEN FPR flight plan route GEN FIDO Flight Inspection District Office GEN FPRC for possible reclearance ATC FIFO Flight Inspection Field Office GEN FPWA further particulars when available ATC FIFO-H Flight Inspection Field Office - High GEN FQT frequent GEN Altitude FR fuel remaining GEN FIFP filed IFR flight plan ATC FRC full route clearance GEN FIG figure GEN FRD fix-radial-distance ATC FIG flight inspection group GEN FREQ frequency ICAO FIL filament GEN FRFAB FSS returns flight-plan area and GEN FILG filling NWS Service B FILS florescan instrument landing system GEN FRI Friday ICAO FINO weather report will not be filed for NWS FRH fly runway heading ATC transmission FRM form GEN FIR Flight Information Region GEN FRMG forming NWS FIRAV first available GEN FRMN formation GEN FIRB Flight Information Region Boundary GEN FRNG firing ICAO FIRG firing GEN FROPA frontal passage NWS FIRIV arrival report will be filed with ATC FROSFC frontal surface NWS FIS flight information service GEN FRQ frequent ICAO FISA automated flight information service ICAO FRSB FSS returns Service B GEN FL flash advisory NWS FRST frost NWS FL flight level GEN FRTFL FSS returns control of tower GEN FLCTN fluctuation GEN frequencies and lights FLD field ICAO FRWF forecast wind factor NWS FLDST flood stage NWS FRZ freeze NWS FLG falling NWS FRZLVL freezing level NWS FLG flashing ICAO FRZN frozen NWS FLIDAP flight data position GEN FSDO Flight Standards District Office GEN FLIP flight information publication GEN FSL full stop landing ICAO FLORL fluorescent runway lighting (flood- GEN FSM flight schedule monitor ATC light system) FSNFO Flight Standards National Field GEN FLR flares ICAO Office FLRY flurry NWS FSP flight strip printer GEN FLT flight ICAO FSS Flight Service Station ICAO FLTCK flight check ICAO FST first ICAO FLTO flight orders GEN FT feet ICAO FLTWO flight watch outlet GEN FT filing time GEN FLUC fluctuating ICAO FT foot GEN FLW follow GEN FTAR following transmitted as received GEN FLWIS flood warning issued NWS (message handling) FM fan marker GEN FTHR farther or further GEN FM from ICAO FTHRD feathered ATC FMAP fan marker approach ATC FTS Federal Telecommunications System GEN FMH fan marker located with GEN FU smoke METAR FMO frequency management officer GEN FURN furnish GEN FMS Flight management system ICAO FV forward visibility (miles) ATC FMT format GEN FVFP filed VFR flight plan ATC FMU flow management unit ICAO FW/SIFR fixed wing special IFR GEN FNA final approach ICAO FW/SVFR fixed wing special VFR GEN FNCTN function GEN FWA flight watch area GEN FNT Front NWS FWC Fleet Weather Central NWS FNTGNS frontogenesis NWS FWCS flight watch control station GEN FNTLYS frontolysis NWS FWD forward GEN FOB fuel on board GEN FWDC forward collect GEN FOD foreign object debris GEN FWP flight watch point GEN FONE telephone GEN FWRNG fire warning GEN FORNN forenoon NWS FWS flight watch specialist GEN FP flight plan GEN FWU flight watch unit GEN FPA flight plan area ATC FYI for your information GEN FPB flight progress board ATC FZ supercooled/freezing METAR

2−1−12 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage FZDZ freezing drizzle METAR GRADU gradual ICAO FZFG freezing fog METAR GRASS grass landing area ICAO FZRA freezing rain METAR GRBL garble GEN FZRANO freezing rain sensor not available METAR GRBNKS Grand Banks NWS GRDL gradual NWS GRID grid point values of processed ICAO meteorological data G GRTLKS Great Lakes NWS GRVL gravel ICAO GS glide slope GEN Contraction Definition Usage GS Ground stop ATC GS Ground speed ATC G Green ICAO GS snow pellets/small hail (less than METAR G gusts reaching (knots) (weather NWS 1/4”) reports only) GSA General Services Administration GEN G/A ground to air ICAO GSDO General Safety District Office GEN G/A/G ground to air and air to ground ICAO GSI General safety inspector GEN GA general aviation ICAO GSTS Gusts NWS GA glide angle GEN GSTY gusty NWS GA Go ahead, resume sending (to be ICAO GTC gain time control ATC used in AFS as a procedure signal) GTCL Great Circle GEN GADO General Aviation District Office GEN GTR greater GEN GALS gallons ATC GUND Geoid undulation ICAO GBA give better address GEN GV ground visibility NWS GBAS ground−based augmentation system ICAO GVG giving GEN GBL government bill of lading GEN GVH government vehicle GEN GBR give better reference GEN GWT gross weight GEN GC ground control GEN GCA ground control approach ICAO GCI ground control intercept GEN H GCO ground communication outlet ATC GDP ground delay program ATC GDPGM Ground Delay Program ATC GEN general GEN Contraction Definition Usage GENOT general notice GEN H24 continuous 24-hour service ICAO GEO geographic GEN HAA height above airport GEN GEOREF geographical reference GEN HADA Hawaiian Defense Area GEN GES ground earth station ICAO HADD Hawaiian Air Defense Division GEN GHZ gigahertz GEN HADIZ Hawaiian Air Defense Identification GEN GIC GPS Integrity Channel ATC Zone GICG glaze icing NWS HAL height above landing GEN GLD glider ICAO HANG Hawaiian Air National Guard GEN GLDR glider GEN HAPI holding as previously instructed ATC GLFALSK Gulf of Alaska NWS HARS hazardous area reporting service ATC GLFCAL Gulf of California NWS HAT height above touchdown GEN GLFMEX Gulf of Mexico NWS HAZ hazard GEN GLFSTLAWR Gulf of St. Lawrence NWS HAZMAT hazardous material ICAO GLONASS global navigation satellite system ICAO HB homing beacon ATC GLONASS Global orbiting navigation satellite ICAO HBN hazard beacon ICAO system HCVIS high clouds visible NWS GLS GBAS Landing System ICAO HDATZ high density traffic zones ATC GMC Ground movement chart (followed ICAO HDF high frequency direction finding ICAO by name/title) station GMT Greenwich Mean Time GEN HDFRZ hard freeze NWS GND ground ICAO HDG heading ICAO GNDCK ground check ICAO HDOP Horizontal Dilution of Precision ATC GNDFG ground fog NWS HDSVLY Hudson Valley NWS GNSS global navigation satellite system (in ICAO HDTA high density traffic airport GEN general) HDWND headwind ATC GNTR generator GEN HEAD Head of State status ICAO GOV Governor GEN HEL helicopter ICAO GOVT government GEN HELI heliport GEN GP glide path ICAO HF high frequency GEN GPA glide path angle ICAO HFR hold for release ATC GPI ground point of intercept ATC HGT height ICAO GPS global positioning system ICAO HHE household effects GEN GQA get quick answer GEN HI high NWS GR hail (greater than 3/4”) METAR HIALS high intensity approach light system GEN GRAD gradient NWS HIBAL high altitude balloon GEN

Decode 2−1−13 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage I HIEAT highest temperature equaled for all NWS time HIEFM highest temperature equaled for the NWS month Contraction Definition Usage HIESE highest temperature equaled so early NWS I/IFR intermittent instruments ATC HIESL highest temperature equaled so late NWS IAARC International Administrative Aero- GEN HIFOR high level forecast NWS nautical Radio Conference HIRIV how will arrival report be filed ATC IAATCD if authorized by ATC, DME may be ATC concerning used HIRL high intensity runway lights GEN IAC chart (followed ICAO HITMP highest temperature NWS by name/title) HIWAS hazardous inflight weather advisory GEN IAF initial approach fix ICAO service IAO in and out of clouds ICAO HIXAT highest temperature exceeded for all NWS IAP instrument approach procedure ICAO time IAR intersection of air routes ICAO HIXFM highest temperature exceeded for the NWS IAS indicated air speed ATC month IATA International Air Transport GEN HIXSE highest temperature exceeded so NWS Association early IATSC International Aeronautical Telecom- GEN HIXSL highest temperature exceeded so late NWS munications Switching Center HJ sunrise to sunset ICAO IAW in accordance with GEN HLDG holding ICAO IBASF intervals between aircraft in stream ATC HLF half GEN type formation HLP heliport ICAO IBN identification beacon ICAO HLSTO hailstones NWS IBND inbound ATC HLTP hilltop NWS IC ice crystals (weather reports only) METAR HN sunset to sunrise ICAO IC icing (PIREP only) ATC HND hundred GEN ICAO International Civil Aviation GEN HNGR hangar GEN Organization HO service available to meet operational ICAO ICD Interface Control Document ATC requirements ICG icing NWS HOL holiday GEN ICGIC icing in clouds NWS HOP handoff point ATC ICGICIP icing in clouds and precipitation NWS HOP helicopter operations GEN ICGIP icing in precipitation NWS HOSP hospital aircraft ICAO ID identify or identifier ICAO HOW handover word ATC IDAT interfacility data GEN HP holding pattern GEN IDENT identification ICAO HPA hectopascal ICAO IDP individual development plan GEN HQ headquarters GEN IF intermediate approach fix ICAO HR here GEN IF intermediate fix GEN HR hour ICAO IFAMP if approach missed proceed ATC HRZN horizon GEN IFF identification friend/foe ICAO HS service available during scheduled ICAO IFHOL if holding ATC operations IFIM International Flight Information GEN HTN heterodyne GEN Manual HTR heater GEN IFINS if instrument conditions encountered ATC HUM humanitarian mission ICAO IFO International Field Office GEN HURCN hurricane ICAO IFO interphone GEN HUREP hurricane report NWS IFONO interphone (service F) not operative GEN HV high voltage GEN IFORO interphone (service F) resumed GEN HVDF high and ICAO operation direction finding stations IFPFP individual flight plans from this point ATC HVY heavy ICAO IFR instrument flight rules ICAO HWVR however GEN IFSS International Flight Service Station GEN HWY highway GEN IFUN if unable GEN HX high index NWS IFVLS if flight visibility becomes less than ATC HX no specific working hours ICAO IFVR if visibility remains ATC HYD hydraulic GEN IGA international general aviation ICAO HYDRO hydrographic GEN IGIA Interagency Group on International GEN HYR higher ICAO Aviation HZ haze METAR IIA if incorrect advise GEN Hz hertz GEN IISD if incorrect service direct GEN

2−1−14 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage ILAS instrument low approach ATC INTRG interrogator ICAO ILS instrument landing system ICAO INTRMTRGN Inter-Mountain Region NWS ILSP ILS-partial GEN INTRP interrupt GEN IM inner marker ICAO INTS intense NWS IMAP immediately after passing ATC INTSF intensify or intensifying ICAO IMC instrument meteorological conditions GEN INTSFY intensify NWS IMDT immediate NWS INTST intensity ICAO IMF interrogation sign GEN INTVL interval GEN IMG immigration ICAO INTXN intersection GEN IMI Intensity unknown (weather reports ICAO INVES investigate GEN only) INVOF in the vicinity of ATC IMP impracticable GEN INVRN inversion NWS IMPL impulse GEN INVSTAR investigate and report GEN IMPR improve ICAO IOVC in overcast NWS IMPT important GEN IP initial point ATC IMT immediate or immediately GEN IP instructor pilot GEN IN inch ICAO IP/HHCL initial point/H-hour control line ATC INA initial approach ICAO IPV improve GEN INADQT inadequate GEN IR ice on runway NWS INATS interruption of air traffic services GEN IR IFR military training route GEN INBD inbound ICAO IRAC Interdepartmental Radio Advisory GEN INC in clouds ICAO Committee INC incorporated GEN IRAD inbound radial ATC INCERFA uncertainty phase code (alerting ATC IREG irregular GEN service) IRN Interface Revision Notices ATC INCL include GEN IS island GEN INCLV inclusive GEN ISA international standard atmosphere ICAO INCOMP incomplete GEN ISB independent sideband ICAO INCOR incorrect GEN ISMGR Island Manager GEN INCR increase GEN ISMLS interim standard microwave landing GEN INDC indicate GEN system INDEF indefinite GEN ISOL isolate GEN INDUS industrial GEN ITCK issue time check ATC INF inland navigation facility GEN ITNRNT itinerant GEN INFO information ICAO ITRY itinerary GEN INIT initial training GEN ITU International Telecommunications GEN INLD inland NWS Union INOF if not off GEN IVFRC in VFR conditions ATC INOP inoperative ICAO INP if not possible GEN J INPR in progress ICAO INREQ information request GEN INS inertial navigation system ICAO Contraction Definition Usage INSP inspect GEN JAL jet approach landing charts GEN INST instrument GEN JATO jet assisted take-off ATC INSTA instruments authorized ATC JAWYS join airways ATC INSTA interstate GEN J-BAR jet runway barrier ATC INSTBY instability NWS JCTN junction GEN INSTL install GEN JOUR journeyman GEN INSTR instruct GEN JP jet penetration ATC INSTR instrument ICAO JPAP jet penetration approach ATC INSUF insufficient scheduled time available GEN JTST jet stream ICAO INSUF unable to finish GEN JTSTR jet stream NWS INT intersection ICAO INTCNTL intercontinental GEN INTCP intercept GEN K INTD intend GEN INTER intermittent ICAO Contraction Definition Usage INTFC interference GEN K Cold (air mass) NWS INTL international ICAO KC kilocycles GEN INTMD intermediate GEN KEPOA keep this office advised GEN INTMT intermittent GEN KFRST killing frost NWS INTNS intentions GEN KG kilogram GEN INTR interior NWS KHZ kilohertz GEN

Decode 2−1−15 JO 7340.2G 1/5/17

Contraction Definition Usage Contraction Definition Usage KIAS knots indicated airspeed GEN LLWS low level wind shear GEN KM kilometers GEN LLZ localizer (not associated with ILS) ICAO KMH kilometers per hour ICAO LM locator middle ICAO KPA kilopascal ICAO LMM compass locator at ILS middle mark- GEN KT knots GEN er KW kilowatt GEN LMT limit GEN LMT Local Mean Time ICAO LN line GEN L LNAV lateral navigation (from TERPS-A1) GEN LND Land GEN LNDG landing GEN Contraction Definition Usage LO liaison officer GEN L Left ICAO LO outer locator ICAO L Locator ICAO LOA letter of agreement GEN L Logistics GEN LOC localizer ICAO L/MF low/medium frequency GEN LOCOR local coordinator GEN LA low approach ATC LODISNAV long distance navigation GEN LAA local airport advisory GEN LOEAT lowest temperature equaled for all NWS LAADR low altitude arrival/departure routing ATC time LAAS Local Area Augmentation System ATC LOEFM lowest temperature equaled for the NWS LAB laboratory GEN month LABRDR labrador NWS LOESE lowest temperature equaled so early NWS LABS leased Service A/B system ATC LOESL lowest temperature equaled so late NWS LABS low altitude bombing system GEN LOM compass locator at ILS outer marker GEN LADP local airport deicing plan ATC LONG longitude ICAO LAM logical acknowledgement ICAO LONGL longitudinal GEN LAN inland ICAO LOP line of position GEN LARCT last radio contact ATC LORAC long range accuracy GEN LAT latitude ICAO LORAN long range air navigation system GEN LAWRS Limited Aviation Weather Reporting GEN LOTMP lowest temperature NWS Station LOXAT lowest temperature exceeded for all NWS LB left base ATC time LB pounds (weight) GEN LOXFM lowest temperature exceeded for the NWS LC local control GEN month LCA locally ICAO LOXSE lowest temperature exceeded so early NWS LCL local or locally GEN LOXSL lowest temperature exceeded so late NWS LCT locate GEN LP left traffic pattern ATC LCTMP little change in temperature NWS LP linear polarization ATC LD long distance GEN LP liquid propane GEN LDA landing distance available ICAO LP localizer performance without GEN LDA localizer type directional aid ATC vertical guidance LDG landing ICAO LPV localizer performance with vertical ICAO LDI landing direction indicator ICAO guidance LDIN lead in lighting system GEN LR The last message received by me was ICAO LEN length ICAO . LETFO letter follows GEN LRA landing rights airport GEN LF low frequency GEN LRCOM long range VHF/UHF GEN LFC laminar flow control GEN communications LFNT low frequency intersection GEN LRG large GEN LFR low frequency radio range GEN LRG long range GEN LFT lift NWS LRS lake reporting service GEN LGRNG long range NWS LS left side ATC LGT light or lighting ICAO LS The last message sent by me was or ICAO LGTD lighted ICAO last message was LGWV long wave GEN LSQ line squall ICAO LICOF land lines communications facilities GEN LSR loose snow on runway NWS LIFR low IFR (weather reports only) NWS LST Local Standard Time GEN LIH light intensity high ICAO LT turn left after take-off ATC LIL light intensity low ICAO LTAV light and variable GEN LIM light intensity medium ICAO LTD limited ICAO LIN linearity GEN LTF local training flight ATC LIRL low intensity runway edge lights GEN LTFC landing traffic ATC LK lake NWS LTGCA lightning cloud-to-air NWS LKLY likely GEN LTGCC lightning cloud-to-cloud NWS LKTYP like type ATC LTGCCCG lightning cloud-to-cloud, cloud to NWS LL landline GEN ground LLWAS low level wind shear alert system GEN LTGCG lightning cloud-to-ground NWS

2−1−16 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage LTGCW lightning cloud-to-water NWS MAPS Meteorological Aeronautical Present- GEN LTGIC lightning in clouds NWS ation System LTL little GEN MAPT missed approach point ICAO LTLCG little change NWS MAR at sea ICAO LTNG lightning NWS MARPT municipal airport GEN LTR later GEN MARSA military assumes responsibility for GEN LTR letter GEN separation of aircraft LTT landline teletypewriter ICAO MAS manual A1 simplex ICAO LTTR latter GEN MAS military alert system GEN LV leaving GEN MAX maximum GEN LV light and variable ICAO MB GEN LVE leave or leaving ICAO MB millibars GEN LVG leaving ATC MBST microburst ICAO LVL level ATC MCA minimum crossing altitude ICAO LVO low visibility operations GEN MCAS Marine Corps Air Station GEN LVLOF level off ATC MCAS(H) Marine Corps Air Station GEN LWR lower GEN (Helicopter) LX low index NWS MCK maintenance check GEN LYR layer or layered or layers NWS MCS Master Control Station ATC MCW modulated continuous wave ICAO MCZNE minimum when control zone GEN effective M MDA minimum descent altitude ICAO MDF medium frequency direction finding ICAO station MDFR make descent from ATC Contraction Definition Usage MDFY modify GEN MDH minimum descent height ICAO M in RVR indicates visibility less than METAR MDT moderate GEN lowest reportable sensor value (e.g. MDZ modernize GEN M600) MDZN modernization GEN M in temperature field means “minus” METAR MEA minimum en route altitude ICAO or below zero MECH mechanic GEN M Mach number GEN MED medical GEN M maritime (air mass) NWS MED medium GEN M metres (preceded by figures) ICAO MEDEVAC medical emergency evacuation ICAO M missing (weather reports only) NWS MEGG merging NWS M Mountain Standard Time (time NWS MEHT minimum eye height over threshold ICAO groups only) MEML memorial GEN MA map analysis NWS MET meteorological GEN MAA maximum authorized (IFR) altitude GEN METAR aviation routine weather report ICAO MAC Military Airlift Command GEN METOF meteorological officer GEN MACH MACH Number (speed ratio to speed ATC METRO metropolitan GEN of sound) MEX Mexico NWS MACKAY Mackay Radio and Telegraph GEN MF medium frequency GEN Company MFL maintain flight level ATC MACVFR make altitude changes VFR ATC MFOB minimum fuel on board ATC MAFAP minimum altitude over facility on ATC MFPOF master flight plan on file ATC final approach course MFS military flight service GEN MAG magnetic GEN MFV forward visibility more than (miles) ATC MAGSI minimum altitude at glide slope GEN MFXT meter fix time ATC intersection inbound MGAT make good a track of (degrees) ATC MAINT maintenance ICAO MGMT make good a magnetic track of ATC MAL maintain at least (altitude) ATC (degrees) MALS medium intensity approach lighting GEN MGMT management GEN system MGR manager GEN MALSF medium intensity approach lighting GEN MHA minimum holding altitude GEN system with sequenced flashers MHDF medium and high frequency direc- ICAO MALSR medium intensity approach lighting GEN tion-finding station (same location) system with runway alignment MHDG magnetic heading GEN indicator lights MHFR military height finder radar GEN MAM maintenance assumes monitor GEN MHKVLY Mohawk Valley NWS MAN Manitoba NWS MHVDF medium high and very high ICAO MAN manual GEN frequency direction-finding station MANAM manual amendment GEN (same location) MANOP manual of operations GEN MHZ megahertz ICAO MAP aeronautical maps and charts ICAO MI manufacturing inspector GEN MAP missed approach point GEN MI mile GEN

Decode 2−1−17 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage MI shallow METAR MPH miles per hour GEN MID middle GEN MPP Merit Promotion Program GEN MID mid-point (related to RVR) ICAO MPS meters per second ICAO MID/ASIA ICAO Middle East/Asia Region ATC MPVA maintain a position VFR and advise ATC MIDIZ Mid-Canada Identification Zone GEN MRA minimum reception altitude GEN MIDN midnight NWS MRG medium range GEN MIDPT midpoint GEN MRGL marginal NWS MIFG patches of shallow fog not deeper NWS MRM maintenance returns monitor GEN than two meters MRNG morning NWS MIFG shallow fog METAR MRP ATS/MET reporting point ICAO MIJI meaconing, intrusion, jamming, ATC MRR mechanical reliability report GEN interference MRTM maritime NWS MIL military ICAO MRU Military Radar Unit GEN MIMNO mimeographic notice GEN MS minus NWS MIN minute ICAO MSA minimum safe/sector altitude GEN MINIT minutes in trail ATC MSAW minimum safe altitude warning GEN MIREQ minimum requirements specified GEN MSG message ICAO MIRL medium intensity runway edge lights GEN MSGCTR message center GEN MIS Missing (transmission ICAO MSL mean sea level ICAO identification) MSR Message (transmission identifica- ICAO MISC miscellaneous GEN tion) has been misrouted MISG missing GEN MSSR Monopulse secondary surveillance ICAO MISL missile GEN radar MIT miles in trail ATC MSTLY mostly NWS MITO minimum interval take-off ATC MSTR moisture NWS MKCT make check turn ATC MT mountain ICAO MKD marked GEN MTCA minimum terrain clearance altitude GEN MKR marker GEN MTI moving target indicator ATC MKR marker radio beacon ICAO MTN mountain NWS MLS GEN MTR military training route GEN MLTLVL melting level NWS MTRL material GEN MM middle marker ICAO MTRY momentary GEN MM millimeter GEN MTU metric units ICAO MMACH maintain Mach ATC MTW mountain wave ICAO MMO main meteorological office NWS MU designate a friction value represent- GEN MNLD mainland NWS ing runway surface conditions MNLY mainly GEN (Greek letter) MNM minimum ICAO MUA maximum usable altitude GEN MNPS minimum navigation performance ATC MUF maximum usable frequency GEN specification MULT multiple GEN MNPSA minimum navigation performance ATC MUNI municipal GEN specification airspace MV millivolt GEN MNT monitor, monitored, or monitoring ICAO MVA minimum vector altitude GEN MNTN maintain ICAO MVDF medium and very high frequency dir- ICAO MNVR maneuver GEN ection-finding station (same location) MOA memorandum of agreement GEN MVFR maintain VFR ATC MOA military operations area ICAO MVFR marginal VFR NWS MOC minimum obstacle clearance ICAO MVSP maintain visual separation ATC (required) MWO Meteorological Watch Office ICAO MOCA minimum obstruction clearance ICAO MWRC maintain well to right of course ATC altitude MWTCS modernized weather teletypewriter GEN MOD moderate GEN communications system MOD modulate or modulation or modulator GEN MXD mixed NWS MOGR moderate or greater NWS MON above mountains ICAO N MON Monday ICAO MONOK monitor resumed normal operation GEN MONOS monitor out of service GEN Contraction Definition Usage MONTR monitor NWS N north or northern latitude ICAO MOPS Minimum operational performance ICAO N/A not applicable GEN standards NA not authorized GEN MOPTAR multi-object phase tracking and GEN NAAS Naval Auxiliary Air Station GEN ranging NAATS National Association of Air Traffic GEN MOREPS monitor station reports GEN Control Specialists MOT Ministry of Transport (Canada) GEN NAB not above GEN MOTNE Meteorological Operational Tele- ICAO NACOS national communications schedule GEN communications Network Europe NADIN National Airspace Data Interchange GEN MOV Move, or moving, or movement ICAO Network

2−1−18 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage NAF Naval Air Facility GEN NICS National Airspace System Interfacil- GEN NAFEC National Aviation Facilities GEN ity Communications System Experimental Center NIL none GEN NANAC National Aircraft Noise Abatement GEN NIL unable to transmit GEN Council NIS not in system GEN NAP not at present GEN NL no layers NWS NAPRS National Airspace Performance ATC NLT not later than GEN Reporting System NM nautical mile ICAO NAR North American Route GEN NMBR number NWS NAR not according to routine GEN NMC National Meteorological Center GEN NAS National Airspace System GEN NML normal GEN NAS Naval Air Station GEN NMN no middle name GEN NASA National Aeronautics and Space GEN NMR nautical mile radius GEN Administration NMRS numerous GEN NASC National AIS system centre ICAO NNE north-north east ICAO NASEO National Airways System GEN NNERN north-northeastern (weather reports NWS Engineering office only) NASP National Airport System Plan GEN NNEWD north-northeastward (weather reports NWS NAT North Atlantic GEN only) NAT not ARTS tracked ATC NNW north-north west ICAO NATCA National Air Traffic Controllers ATC NNWRN north-northwestern (weather reports NWS Association only) NATCAS Navigation, ATC, and Collision GEN NNWWD north-westward (weather reports NWS Avoidance System only) NATCC National Air Transport Coordinating GEN NO No (negative) ICAO Committee NO not available METAR NATCOM National Communications Center GEN NOAA National Oceanic and Atmospheric GEN NATL national GEN Administration NATR no additional traffic reported ATC NOAC no action necessary GEN NATS noise abatement test system GEN NOF NOTAM Office GEN NAV navigation ICAO NOFIN no further information GEN NAVAID navigational aid GEN NOHOL not holding ATC NAVLO Navy Liaison Officer GEN NOIFN no information GEN NAVREP Navy Representative to the FAA GEN NOMAD Naval Oceanographic Meteorological GEN NB New Brunswick NWS Automatic Device NB northbound ICAO NONEG negative replies not required GEN NBCAP national beacon code allocation plan GEN NONRVSM non−RVSM capable flight ICAO NBFR not before ICAO NOPAC North Pacific ATC NBND northbound GEN NOPAR do not pass to Air Defense radar ATC NBRHD neighborhood GEN NOPT no procedure turn required GEN NC no change GEN NORAC no radio contact ATC NCDC National Climatic Data Center GEN NORAD North American Aerospace Defense GEN NCE no change in estimates ATC Command NCS National Communications System GEN NORDO no radio GEN NCWX no change in weather NWS NOREC no record GEN NDB nondirectional radio beacon ICAO NOREP no report GEN NDB/DME NDB and DME (collocated) GEN NORIV no arrival report ATC NDBLO not to descend below ATC NORPI no pilot balloon observation will be NWS NE north-east ICAO filed next collection unless weather NEB north-eastbound ICAO changes significantly NEC necessary GEN NORR no reply received GEN NEF no further clearance required ATC NORST no restrictions GEN NEG negative GEN NOS National Ocean Service GEN NELY northeasterly (weather reports only) NWS NOSI now simultaneous GEN NERN northeastern NWS NOSIG no significant change ICAO NESS national environmental satellite GEN NOSPL no special observations taken (weath- NWS service er reports only) NETR no essential traffic reported ATC NOSUM NOTAM Summary GEN NEW ENG New England NWS NOTAM Notice to Airmen ICAO NFDC National Flight Data Center GEN NOZ normal operating zone GEN NFDD National Flight Data Digest GEN NOZ Normal operating zone ICAO NFLD Newfoundland NWS NPI nonprecision instrument GEN NFQ night frequency GEN NPRL no parallel traffic ATC NFT no filing time GEN NPRM Notice of Proposed Rulemaking ATC NFU not for us GEN NPRS nonpersistent NWS NG National Guard GEN NR near GEN NGT night ICAO NR number GEN NHD not heard ATC NRAB Naval Reserve Air Base GEN

Decode 2−1−19 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage NRD no record of destination GEN OCAS out of controlled airspace ATC NRH no reply heard ICAO OCFNT occluded front NWS NRP North American route program ATC OCH obstacle clearance height ICAO NRV nonrevenue GEN OCL obstacle clearance limit ICAO NRW narrow GEN OCLD occlude NWS NS nimbostratus NWS OCLN occlusion NWS NS Nova Scotia NWS OCNL occasional GEN NSC no significant cloud ICAO OCR occur GEN NSC Nonstandard C/A Code ATC OCS obstacle clearance surface ICAO NSCSWD no small craft or storm warning are NWS OCTLA out of control area ATC being displayed ODALS omnidirectional approach lighting GEN NSP nonstandard holding pattern GEN system NSSFC National Severe Storm Forecast GEN ODAPS Oceanic Display and Planning ATC Center System NSTP nonstop GEN OFAS overseas flight assistance service GEN NSW no significant weather METAR OFC office GEN NTAP National Track Analysis Program ATC OFFL official GEN NTAP Notices To Airmen Publication ATC OFM out for maintenance GEN NTE not to exceed GEN OFP occluded frontal passage NWS NTFND no trouble found GEN OFP original flight plan GEN NTFY notify GEN OFSHR offshore NWS NTL National ICAO OFW off watch GEN NTO name to GEN OFXT outer fix time ATC NTRP no traffic reported ATC OFZ Obstacle free zone ICAO NTSB National Transportation Safety Board GEN OG on ground ATC NTZ no transgression zone ATC OGN Originate ICAO NTZ No transgression zone ICAO OHD overhead ICAO NUDET nuclear detonation GEN OI on instruments ATC NVA negative vorticity advection NWS OINT omni intersection GEN NW north-west ICAO OIS operational information system ATC NWB north-westbound ICAO OJT on-the-job training GEN NWLY northwesterly (weather reports only) NWS OK operating normally GEN NWRN northwestern (weather reports only) NWS OK We agree or it is correct ICAO NWS National Weather Service GEN OLDI On line data interchange ICAO NWSO Naval Weather Service Office GEN OLS optical landing system ATC NXT next GEN OM outer marker ICAO OMSG our message GEN OMTNS over mountains NWS ONER oceanic navigational error report ATC O ONSHR on shore NWS ONT Ontario NWS ONW on watch GEN OOT out of tolerance GEN Contraction Definition Usage OPA opaque, white type of ice formation ICAO O/F on file GEN OPC operational control ICAO O/R on request GEN OPDT opposite direction traffic GEN O/T overtime GEN OPER operate GEN OA overhead approach ATC OPMET operational meteorological ICAO OAC oceanic area control GEN (information) OAG Official Airline Guide GEN OPN open ICAO OANDR operation and regulation GEN OPN operation GEN OAOI on and off instruments ATC OPNML operations normal GEN OARTS oceanic air route tracking system GEN OPR operate, operator, operational ICAO OAS obstacle assessment surface ICAO OPS operations ICAO OAT outside air temperature GEN OPSNET operations network ATC OB on board GEN ORD order, indication of ICAO OBL obliterate GEN ORGPHC orographic NWS OBND outbound ATC ORIG original GEN OBS observe, observed, or observation ICAO ORL overrun lights GEN OBSC obscure, obscured, or obscuring ICAO ORS over range station ATC OBST obstacle ICAO OSV ocean station vessel NWS OBST obstruct GEN OT on time ATC OBSTN obstruction GEN OTAS on top and smooth NWS OC obstruction chart GEN OTFC overflight traffic GEN OC on course ATC OTLK outlook NWS OCA obstacle clearance altitude ICAO OTP on top ATC OCA oceanic control area ICAO OTR other GEN OCAC oceanic ATC GEN OTRW otherwise GEN

2−1−20 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage OTS organized track system GEN PCS permanent change of station GEN OTS out of service GEN PCT percent ICAO OUBD outbound ICAO PD period GEN OV location (PIREP only) ATC PDAR preferential arrival/departure route GEN OVC overcast NWS (Stage A) OVD overdue GEN PDC Pre-departure clearance ICAO OVHD overhead GEN PDDC proceed directly on course ATC OVLA overlay GEN PDMT predominant NWS OVNGT overnight GEN PDMT predominate NWS OVR over GEN PDOP Position Dilution of Precision ATC OVRN overrun GEN PDR preferential departure route (Stage A) GEN OVSEA overseas GEN PDW priority delayed weather NWS OVTK overtake GEN PEN peninsula NWS OW one way GEN PENT penetrate or penetration ATC OWF optimum working frequency GEN PER performance ICAO OXY oxygen GEN PERCOM peripheral communications GEN PERF perforator GEN P PERM permanent ICAO PFSV pilot to forecaster service GEN PGTSND Puget Sound NWS Contraction Definition Usage PHYS physical GEN P in RVR indicates visibility greater METAR PIB Pre-flight information bulletin ICAO than highest reportable sensor value PIBAL pilot balloon observation NWS (e.g. P600FT) PIC pilot in command GEN P Pacific Standard Time (time group NWS PIR precision instrument runway GEN only) PIREP pilot weather report GEN P polar (air mass) NWS PIRFC pilot requests forecast GEN P prohibited area ICAO PISE no pilot balloon observation due to NWS P/CG pilot controller glossary GEN unfavorable sea conditions P6SM visibility greater than 6 SM (TAF METAR PISO no pilot balloon observation due to NWS only) snow PA precision approach GEN PIT pilot instructor training GEN PA pressure altitude GEN PIWI no pilot balloon observation due to NWS PAC Pacific NWS high, or gusty, surface wind PACF parent FSS assumes control of GEN PJE parachute jumping exercise ICAO part-time FSS PK WND peak wind (weather reports only) NWS PADRA pass to air defense radar ATC PL ice pellets METAR PAEW personnel and equipment working GEN PLA practice low approach ICAO PAJA parachute jumping activities GEN PLASI pulsating visual approach slope ATC PALS precision approach lighting system ICAO indicators PALT present altitude ATC PLAT present latitude ATC PANS procedures for air navigation services ICAO PLF private line telephone GEN PAPI precision approach path indicator ICAO PLN flight plan ICAO PAR precision approach radar ICAO PLOB place of birth GEN PARA paragraph GEN PLONG present longitude ATC PAREN parenthesis GEN PLS please GEN PARL parallel ICAO PLT private line teletypewriter GEN PARROT GEN PLVL present level ICAO PARROT Position adjustable range reference ATC PLW plow (snow) NWS orientation transponder PM post meridiem GEN PAT pattern GEN PMSN permission GEN PATC Precision approach terrain chart ICAO PMT permit GEN PATWAS pilots automatic telephone weather GEN PN prior notice required ICAO answering service PNHDL panhandle NWS PAU present address unknown GEN PNR point of no return ATC PAX passenger ICAO PO dust devils METAR PBCT proposed boundary crossing time GEN PO post office GEN PBL probable NWS PO purchase order GEN PBS public buildings service GEN POA privately owned aircraft GEN PCA positive control area GEN POB persons on board ICAO PCD proceed ICAO POC proceed or proceeding on course ATC PCK pilot check ATC POS positive GEN PCL pilot controlled lighting GEN POSS possible ICAO PCL Pilot controlled lighting ICAO POV privately owned vehicle GEN PCN pavement classification number ICAO PP pay period (number) GEN PCPN precipitation NWS PPI plan position indicator ICAO

Decode 2−1−21 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage PPINA radar weather report not available (or NWS PSR packed snow on runway NWS omitted for a reason different than PSR Primary surveillance radar ICAO those otherwise stated) PSRI position subject to return of GEN PPINE radar weather report no echoes NWS incumbent observed PSRS position subject to rotating shifts GEN PPINO radar weather report equipment NWS PST Pacific Standard Time GEN inoperative due to breakdown PT procedure turn GEN PPIOK radar weather report equipment NWS PTC plan to clear ATC operation resumed PTC positive target control ATC PPIOM radar weather report equipment NWS PTCHY patchy NWS inoperative due to maintenance PTCP participate GEN PPR prior permission required ICAO PTLY partly NWS PPS propose GEN PTN portion GEN PPSN present position ATC PTN procedure turn ICAO PR partial METAR PTP point-to-point ATC PR photo reconnaissance GEN PTR printer GEN PRBL probable GEN PTS polar track structure ICAO PRBLTY probability NWS PUB public GEN PRBO position relief briefing observed ATC PUBL publish GEN PRCF parent FSS returns control of GEN PUP pickup GEN part-time FSS PVA positive vorticity advection NWS PRCHT parachute GEN PVASI pulsating/steady visual approach GEN PRCTN precaution GEN slope indicator PRECD precede GEN PVL prevail GEN PREF preferred ATC PVLT prevalent GEN PRES pressure GEN PVT private GEN PRESFR pressure falling rapidly NWS PWB pilot weather briefing GEN PRESRR pressure rising rapidly NWS PWI proximity warning indicator ATC PREV previous GEN PWINO precipitation identifier information NWS PRFG fog partial METAR not available (weather reports only) PRI primary ICAO PWR power GEN PRIM primary GEN PWRNO power failure GEN PRIN principal GEN PWROK power restored GEN PRIND present indications are GEN PY spray METAR PRIRA GEN PRJMP pressure jump (weather reports only) NWS PRKG parking ICAO Q PRN pseudo random noise GEN PROB probability ICAO Contraction Definition Usage PROB30 slight chance METAR PROB40 probability 40 percent METAR QDL Do you intend to ask me for a series ICAO PROC procedure ICAO of bearings? Or I intend to ask you PROCD proceed GEN for a series of bearings PROG prognosis or prognostic NWS QDM magnetic heading ICAO PROG progress GEN QDR magnetic bearing ICAO PROP propeller GEN QFE atmospheric pressure at airport ICAO PROPA propagation GEN elevation PROSIG procedure signal GEN QFLOW quota flow control procedures GEN PROV provisional ICAO QFU magnetic orientation of runway ICAO PRP prepare GEN QGE What is my distance to your station ICAO PRSNT present NWS or Tour distance to my station is PRST persist GEN QJH Shall I run my test tape/a test ICAO PRVD provide GEN sentence PS passenger service GEN QLFY qualify GEN PS plus NWS QLTY quality GEN PSBL possible GEN QN question GEN PSBT pilot self-briefing terminal GEN QNH altimeter sub-scale setting to obtain ICAO PSG passage NWS elevation when on the ground PSG passing NWS QNTY quantity GEN PSGR passenger GEN QSP Will you relay to free of charge or I ICAO PSN position ICAO will relay to free of charge PSNAL personal GEN QSTNRY quasistationary NWS PSNL personnel GEN QTA Shall I cancel telegram number ? ICAO PSNRP position report ATC Or cancel telegram number PSP pierced steel planking ICAO QTE true bearing ICAO

2−1−22 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage QTF Will you give me the position of my ICAO RAJAM radar jamming ATC station according to the bearings RALT regardless of altitude ATC taken by the D/F station which you RAM returned account mechanical GEN control or the position of your station RAOB observation NWS according to the bearings taken by RAPCON radar approach control GEN the D/F stations that I control was RAPI radiosonde report already sent in GEN latiude longitude (or other indica- PIBAL collection tion of position), class ....at....hours RARAD radar advisory GEN QTR quarter GEN RAREP radar weather report NWS QUAD quadrant GEN RASC Regional AIS system centre ICAO QUE Quebec NWS RASH rain showers ICAO QUJ Will you indicate the TRUE track to ICAO RASN rain and snow or showers of rain and METAR reach you or the TRUE track to reach snow me is degrees at hours RATCF radar ATC facility (USN) GEN RAVU radiosonde analysis and verification NWS unit RAWE no RAWIN obs., unfavorable weath- NWS R er RAWI no RAWIN obs., high and gusty NWS winds RAWIN upper winds obs. (by radio methods) NWS Contraction Definition Usage RAWX returned account weather GEN R Acknowledgement of receipt GEN RB rescue boat ICAO (message handling) RB right base ATC R Received (acknowledgement of ICAO RBDE radar bright display equipment GEN receipt) RBN radio beacon GEN R restricted area (followed by ICAO RBOC report back on course ATC identification) RBOF report back on frequency ATC R right (runway identification) ICAO RBS radar bomb scoring GEN R runway (used in RVR measurement) METAR RBS ration by schedule plus compression ATC R/O receive only GEN PP(RBS+++) R/OC receive, only centers GEN RC reverse course ATC RA rain METAR RC road reconnaissance GEN RAA Remote Airport Advisory ATC RCA reach cruising altitude ICAO RAAF Royal Australian Air Force GEN RCADV reverse course and advise ATC RABA no RAWIN obs., no balloons NWS RCAG remote communications air/ground GEN available facility RABAL radiosonde balloon wind data NWS RCALT reach cruising altitude ATC RABAR radiosonde balloon release NWS RCC Rescue Coordination Center GEN RAC request altitude change ATC RCD radar cloud detection report NWS RAC rules of the air and air traffic services ICAO RCDNA radar cloud detection report not NWS RACE request altitude changes en route ATC available RACFI radio and communication facilities GEN RCDNE radar cloud detection report no NWS inoperative echoes observed RACO no RAWIN obs., communications out NWS RCDNO radar cloud detector inoperative due NWS RACON radar responder beacon GEN to breakdown until RADAT radiosonde observation data NWS RCDOM radar cloud detector inoperative due NWS RADEP radar departure ATC to maintenance until RADNO report missing account radio failure NWS RCF radio communication failure ICAO RADON radar beacon GEN RCF radiocommunication failure ICAO RADU weather radar analysis and GEN RCF remain on company frequency ATC development unit RCH reach GEN RAF Royal Air Force GEN RCH reach - call sign for U.S. AirForce, MIL RAFC regional area forecast center ICAO Air Mobility Command RAFI radiosonde observation not filed NWS (USAFAMC) RAFRZ radiosonde observation freezing NWS RCK radio check ATC levels RCKY Rockies (mountains) NWS RAG ragged ICAO RCL runway center line ICAO RAG runway arresting gear ICAO RCLL runway center line lights ICAO RAGF remote air-ground facility GEN RCLM runway centerline marking GEN RAHE no RAWIN obs., no gas available NWS RCLR radio communications link repeater GEN RAI runway alignment indicator ICAO RCLS runway centerline light system GEN RAICG radiosonde observation icing at NWS RCLT radio communications link terminal GEN RAIL runway alignment indicator lights GEN RCMD recommend GEN RAIM Receiver Autonomous Integrity ATC RCN Royal Canadian Navy GEN Monitoring RCO remote communication outlet GEN RAIM Receiver autonomous integrity ICAO RCOM en route communications GEN monitoring RCON reconfiguration ATC

Decode 2−1−23 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage RCPT receipt GEN RFI radio frequency interference GEN RCR runway condition reading GEN RFI ready for issue GEN RCRD record GEN RFL refuel GEN RCS Rehost Computer System ATC RFS refuse GEN RCV receive GEN RFTO ready for take-off ATC RCVNO receiving capability out GEN RG range (lights) ICAO RDARA regional and domestic air route area GEN RG reception good (radio logs only) ATC RDAT radar data (digitized) GEN RGD ragged NWS RDC reduce GEN RGLR regular GEN RDG ridge NWS RGN region GEN RDH reference datum height (ILS) ICAO RH relative humidity NWS RDL radial ICAO RHC Right-hand circuit ICAO RDO radio ICAO RHI range height indicator GEN RDS radius GEN RHINO radar echo height information not NWS RDSP redispatch GEN available RDSPA redispatch accepted GEN RHINO radar range height indicator not NWS RDWND radar dome wind NWS operating on scan RE regard GEN RIF reclearance in flight ICAO REBAT reference BATCS report GEN RIF reduction in force GEN REC receive or receiver ICAO RIMAT must ride company material GEN RECLR recleared ICAO RIOGD Rio Grande NWS RECON reconnaissance GEN RIS reports identification symbol GEN RECON reference conversation GEN RITC Request in Trail Climb ATC REDL runway edge light ICAO RITD Request in Trail Descent ATC REF reference ICAO RITE right (direction of turn) ICAO REFONE reference our telephone conversation GEN RL report immediately upon leaving ATC REFORM reference form GEN RL report leaving ICAO REG registration ICAO RLA relay to ICAO REG regulation GEN RLANO relay equipment out of operation GEN REGAL range and elevation guidance for ATC RLAOK relay equipment resumed operation GEN approach and landing RLBG relative bearing GEN REIB report established in block ATC RLC report landing completed ATC REIL runway end identifier lights GEN RLCE request level change en route ICAO REINV reference invoice GEN RLETFL report leaving each thousand foot ATC RELBL reliable GEN level RELCT relocate GEN RLLS runway lead-in lighting system ICAO RELET reference letter GEN RLNA request level not available ICAO REMES reference message GEN RLS release GEN REMT relief electronic maintenance GEN RLSTN relay station GEN technician RLTK rhumbline track ATC RENL runway end light ICAO RLTV relative GEN RENOT regional office notice GEN RLV relieve GEN REOC report when established on course ATC RLVL report level GEN REP report or reporting point ICAO RM remarks (PIREP only) ATC REP represent or representative GEN RMK remark ICAO REP research project GEN RMLR radar microwave link repeater GEN REPAML reply by airmail GEN RMLT radar microwave link terminal GEN REPBS reference PBS message GEN RMN remain GEN REPERF reperforator GEN RMPCK ramp check ATC REPMES reply by message GEN RMRK remark GEN REPML reply by mail GEN RN reception nil (radio logs only) ATC REPTWX reply by TWX GEN RNAV area navigation ICAO REQ request GEN RNFL rainfall NWS REQID request if desired GEN RNG Army National Guard GEN REQON request consideration GEN RNG radio range ICAO REQRCM request your recommendation GEN RNLS resume normal speed ATC REQSTD requested GEN RNP required navigation performance ICAO RERTE reroute ICAO RO regional office GEN RES reserve GEN RO regulated output GEN RES resident GEN ROBEPS radar operating below prescribed NWS RESA Runway end safety area ICAO standard RESP response GEN ROBEX regional OPMET bulletin exchange ICAO RESTR restrict NWS ROC rate of climb ICAO REWRC report when established well to right ATC ROCC NORAD Region Operations Control GEN of course Center RF radio frequency GEN ROD rate of descent ICAO RF reception fair (radio logs only) ATC RODA regardless of destination airport ATC RFA request further airways ATC ROFOR route forecast ICAO

2−1−24 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage ROLET reference letter from our office GEN RSCU rescue GEN ROMEMO reference our memorandum GEN RSG rising NWS ROMES reference message from our office GEN RSN reason GEN RON remaining overnight GEN RSOPN resumed operation GEN ROPBS reference PBS message from our GEN RSP responder beacon ICAO office RSR en route surveillance radar ICAO RORQN reference requisition from our office GEN RSTR restrict GEN RORU rest of route unchanged ATC RSU runway supervisory unit GEN ROT rotate GEN RSVN reservation GEN ROTEL reference telegram from our office GEN RT right turn after take-off ATC ROTG rotating GEN RT round trip GEN ROTWX reference our TWX GEN RTB return to base ATC ROV report over ATC RTD delayed ICAO RP reception poor (radio logs only) ATC RTE route GEN RP right traffic pattern ATC RTF radiotelephone GEN RPA request present altitude ATC RTG radiotelegraph GEN RPD rapid NWS RTHL runway threshold light ICAO RPFOD reported for duty GEN RTMTR remote transmitter GEN RPI Radar position indicator ICAO RTN return ICAO RPL repetitive flight plan ICAO RTND retained GEN RPLC replace GEN RTNE routine GEN RPM rotation per minute GEN RTO report time over ATC RPOC report proceeding on course ATC RTR remote transmitter/receiver ATC RPR repair GEN RTR returning to ramp ATC RPRT report GEN RTRD retard GEN RPS radar position symbol ICAO RTRN return GEN RPSG report passing ATC RTS return to service ICAO RPT repeat GEN RTT radioteletypewriter GEN RPT Repeat or I repeat ICAO RTX report time crossing ATC RQ Indication of a request ICAO RTZL runway touchdown zone light ICAO RQ request GEN RUF rough NWS RQCL request clearance ATC RUFORM reference your form GEN RQDCZ request clearance to depart VFR and ATC RULET reference letter from your office GEN leave control zone at RUMEMO reference your memorandum GEN RQECZ request clearance to enter control ATC RUMES reference message from your office GEN zone VFR at RURQN reference requisition from your GEN RQMNTS requirements ICAO office RQN requisition GEN RUT standard regional route transmitting ICAO RQOF request on file ATC frequencies RQP request flight plan ICAO RUTEL reference telegram from your office GEN RQP request permission GEN RUTWX reference your TWX GEN RQPP request present position ATC RV radar vector ATC RQR require GEN RV rescue vessel ICAO RQRP request reply GEN RVO runway visibility by observer GEN RQS request supplementary flight plan ICAO RVR runway visual range ICAO RQTAO request time and altitude over ATC RVRA RVR ten minute average GEN RR low or medium frequency radio GEN RVRANO RVR ten minute average not GEN range stations available RR radar range station GEN RVRENO RVR ten minute extremes not GEN RR report immediately upon reaching ATC available RR report reaching ICAO RVRM RVR midpoint GEN RRBN round robin ATC RVRMNO RVR midpoint not available GEN RRCVR remote receiver GEN RVRNO RVR not available GEN RRL runway remaining lights GEN RVRR RVR rollout GEN RRP runway reference point GEN RVRRNO RVR rollout not available GEN RRPD runway reference point downwind GEN RVRT RVR touchdown GEN RRPU runway reference point upwind GEN RVRTNO RVR touchdown not available GEN RRS remainder of same route ATC RVS revise GEN RRTE reroute ATC RVSM Reduced Vertical Separation Minim- ICAO RS receiver station GEN um RS record special observation (weather NWS RVV runway visibility value GEN reports only) RVVNO RVV not available GEN RS right side ATC RWRC remain well to right of course ATC RSC rescue sub-center ICAO RWY runway ICAO RSCD runway surface condition ICAO RY runway GEN

Decode 2−1−25 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

S Contraction Definition Usage SEB south-eastbound ICAO SEC second (time) GEN Contraction Definition Usage SECMR sector manager GEN SECRA secondary radar GEN S South or southern latitude ICAO SECT sector ICAO S/A semi-annual GEN SEL space environment laboratory GEN S/RC send/receive center GEN SELCAL selective calling ATC SA duststorm, sandstorm, rising dust or METAR SELS severe local storms NWS sand SELY southeasterly (weather reports only) NWS SA record observation (weather reports NWS SENS sensitivity GEN only) SEPN separation GEN SA sand, sandstorm, or dusting ICAO SEQ sequence GEN SA surveillance approach GEN SER service ICAO SABH simultaneous automatic broadcast GEN SERN southeastern (weather reports only) NWS homer SES supervisory electronics specialist GEN SADT same direction traffic GEN SESC space environment service center GEN SAFI semi-automatic flight inspection GEN SET stack entry time ATC SAFI semi-automatic flight inspection GEN SEV severe ICAO aircraft SF standard form GEN SALS short approach lighting system GEN SFA single frequency approach GEN SALS simple approach lighting system ICAO SFC surface ICAO SALSF short approach lighting system with GEN SFERICS atmospherics NWS sequenced flashing lights SFL sequence flashing lights GEN SAN sanitary ICAO SFO sector field office GEN SAO surface aviation observation NWS SFO simulated flame out ATC SAP as soon as possible ICAO SFPP stored flight plan program ATC SAPD speed at pilots discretion GEN SFRA special flight rules area GEN SAR search and rescue ICAO SFU sector field unit GEN SARPS standards and recommended ICAO SG snow grains (weather reports only) METAR practices SGD signed GEN SASK Saskatchewan NWS SGD solar-geophysical data NWS SAT Saturday ICAO SGFNT significant GEN SATCOM satellite communication ICAO SGL signal GEN SATFY satisfy or satisfactory GEN SH showers METAR SATR so as to reach ATC SHF super high frequency GEN SATR special air traffic rules GEN SHFT shift (weather reports only) NWS SAVASI simplified abbreviated visual GEN SHGR hail showers METAR approach slope indicator SHGS hail showers (small) METAR SAWRS supplementary aviation weather GEN SHLW shallow NWS reporting station SHORN short range navigation system GEN SAYTA say time able ATC SHP standard holding procedure GEN SB southbound ICAO SHPL ice pellet showers METAR SBAS satellite−based augmentation system ICAO SHRA rain showers METAR SBFC standby for further clearance ATC SHRT short GEN SBND southbound ATC SHRTLY shortly NWS SBSD subside NWS SHRTWV shortwave GEN SC stratocumulus NWS SHSN snow showers METAR SCAN self-correcting automatic navigation GEN SHTDN shutdown GEN SCANO automatic scanning unit out of GEN SHUD should ATC service SHWR shower NWS SCAOK automatic scanning unit returned to GEN SI straight-in approach GEN service SIA standard instrument approach GEN SCAT security control of air traffic GEN SIAP standard instrument approach GEN SCATANA security control of air traffic and air GEN procedure navigation aids SID standard instrument departure ICAO SCC System Command Center GEN SIERNEV Sierra Nevada NWS SCLN semicolon GEN SIF selective identification feature ICAO SCND second (in line) GEN SIG signature GEN SCS single channel simplex GEN SIGMET significant meteorological GEN SCSL standing lenticular stratocumulus NWS information SCT scattered NWS SIGWX significant weather ICAO SCTR sector GEN SIM simulated approach ATC SCTY security GEN SIMUL simultaneous/ly ICAO SDB scheduled data base GEN SIR snow and ice on runway NWS SDBY standby GEN SIWL single isolated wheel load ICAO SDF simplified directional facility GEN SJP standard jet penetration GEN SE south-east ICAO SK sky condition (PIREP only) ATC SE system engineer GEN SKC sky clear METAR SEADRM seadrome GEN SKED schedule ICAO

2−1−26 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage Contraction Definition Usage SL sea level GEN SPL supplementary flight plan ICAO SL sick leave GEN SPLNS south plains NWS SLCT select GEN SPO strategic plan of operation ATC SLD solid NWS SPOT spot wind ICAO SLGT slight GEN SPRD spread NWS SLMM simultaneous compass locator at GEN SPRL spiral GEN middle marker SPS Standard Positioning Service ATC SLO slow GEN SPT strategic planning team ATC SLOM simultaneous compass locator at out- GEN SQ squall METAR er marker SQDN squadron GEN SLP sea level pressure METAR SQK squawk ATC SLP slope GEN SQLN squall line NWS SLP speed limiting point ICAO SR standard range approach GEN SLR slush on runway NWS SR sunrise ICAO SLRAP standard low frequency range GEN SRA surveillance radar approach ICAO approach SRCH search GEN SLS side lobe suppression GEN SRE surveillance radar element of preci- ICAO SLT sleet NWS sion approach radar system SLW slow ICAO SRG short range ICAO SM statute mile GEN SRND surround GEN SMC squawk mode code GEN SRPN special requisition priority number GEN SMC surface movement control ICAO SRR search and rescue region ICAO SMGCS surface movement guidance and con- GEN SRY secondary ICAO trol system SS sandstorm METAR SML small GEN SS sunset ICAO SMR statute mile radius GEN SSALF simplified short approach lighting GEN SMR surface movement radar ICAO system with sequenced flashers SMRY summary GEN SSALR simplified short approach lighting GEN SMS synchronous meteorological satellite GEN system with runway alignment SMS systems maintenance sector GEN indicator lights SMT submit GEN SSALS simplified short approach lighting GEN SMTH smooth NWS system SMTM sometime GEN SSB single sideband ICAO SMWHT somewhat GEN SSE south-south east ICAO SN snow ICAO SSERN south-southeastern (weather reports NWS SN strategic navigation GEN only) SN systems navigation GEN SSEWD south-southeastward (weather reports NWS SNBNK snowbank NWS only) SND sand or sanded or sanding GEN SSNO request no SIDs or STARs ATC SNFLK snowflake NWS SSR secondary surveillance radar ICAO SNGL single GEN SST supersonic transport ICAO SNOINCR snow depth increase in past hour NWS SSW south-south west ICAO SNOWTAM NOTAM reporting the presence or ICAO SSWRN south-southwestern (weather reports NWS removal of hazardous conditions due only) to snow, ice, slush or standing water SSWWD south-southwestward (weather NWS associated with snow, slush or ice on reports only) the movement area ST saint GEN SNSH snow showers ICAO ST stratus NWS SNW snow NWS STA straight in approach ICAO SNWFL snowfall NWS STADMR station administrator GEN SOAP spectrometric oil analysis program ATC STAGN stagnation NWS SOB souls on board ATC STALO stabilized local oscillator GEN SOCC NORAD Sector Operations Control GEN STAR standard instrument arrival ICAO Center STAR standard terminal arrival GEN SOMSG see our message GEN STATE military, customs, or police services ICAO SOP standard operating procedure GEN STBL stable GEN SORAP standard omni range approach GEN STBY standby ICAO SP standard holding pattern GEN STCLB start climb ATC SP station pressure NWS STD standard ICAO SPAN stored program for alpha numerics GEN STDST start descent ATC SPB seaplane base GEN STDY steady GEN SPCLY especially GEN STF stratiform ICAO SPD speed GEN STFRA stratus fractus NWS SPEC specification GEN STFRM stratiform NWS SPECI aviation selected special weather METAR STG strong NWS report STLT satellite GEN SPKL sprinkle NWS STM storm NWS SPL special GEN

Decode 2−1−27 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage STMGR station manager GEN TACLO tactical air command liaison officer GEN STMP special traffic management program ATC TACR tactical air navigation GEN STN station GEN TAD ATC tower, approach and departure ATC STNR stationary ICAO control facility STNRY stationary NWS TAF aerodrome forecast ICAO STOL short take-off and landing GEN TAF terminal forecast METAR STR subject terminal control release ATC TAIL tail wind ICAO STRO stereo routes GEN TAND tandum GEN STS status ICAO TANDA time and attendance report GEN STWL stopway light ICAO TAO TACAN only ATC STWY stopway GEN TAO time and altitude over ATC SUA special use airspace GEN TAPER temporary appointment pending GEN SUB substitute GEN establishment of a register SUBFIX subject to correction GEN TAR terminal area surveillance radar ICAO SUBJ subject to ICAO TARND turn around ATC SUF sufficient GEN TARS terminal automated radar services GEN SUG suggest GEN TARS Tethered Aerostat Radar System GEN SUN Sunday ICAO TAS true air speed GEN SUP supply GEN TASR terminal area surveillance radar GEN SUPCHG supercharge GEN TAWOG travel arrangements without GEN SUPPL supplement GEN government expense SUPPS regional supplementary procedures ICAO TAX taxi or taxiing ICAO SUPR superior GEN TB turbulence (PIREP only) ATC SUPSD supersede GEN TBJT turbojet GEN SUPT superintendent GEN TC time check ATC SUPVR supervisor GEN TC tropical cyclone ICAO SURPIC surface picture ATC TCA terminal control area GEN SUSP suspend GEN TCA tactical customer advocate ATC SVC service GEN TCAS traffic alert and collision avoidance GEN SVCBL serviceable ICAO system SVFR special VFR GEN TCF Traffic Flow Management Convec- ATC SVG serving GEN tive Forecast Product SVN space vehicle number GEN TCH threshold crossing height ICAO SVR severe GEN TCHD threshold crossing height downwind GEN SVRL several GEN TCHU threshold crossing height upwind GEN SW south-west ICAO TCNTL trans-continental GEN SWAP severe weather avoidance plan GEN TCOM terminal communications GEN SWB scheduled weather broadcast GEN TCP transfer of control point ATC SWB south-westbound ICAO TCU towering cumulus NWS SWLG swelling NWS TD Touchdown ATC SWLY southwesterly (weather reports only) NWS TD transmitter distributor GEN SWRN southwestern (weather reports only) NWS TDA Today GEN SWSL supplemental weather service ATC TDEL time delay GEN location TDLS Terminal Data Link System GEN SWY stopway ICAO TDO Tornado ICAO SX stability index NWS TDOP Time Dilution of Precision ATC SXN section NWS TDWR Terminal Doppler Weather Radar ATC SYD release subject your discretion GEN TDY temporary duty GEN SYNOP synoptic NWS TDZ touchdown zone ICAO SYNS synopsis NWS TDZE touchdown zone elevation ATC SYS see your service GEN TDZL touchdown zone light (system) GEN SYS system GEN TEC tower en route control ATC TECA tower en route control area ATC T TECR technical reason ICAO TEL telecommunications GEN TEL Telephone ICAO Contraction Definition Usage TELAU Teleautograph GEN T Temperature ICAO TELCO telephone company GEN T trace (weather reports only) NWS TELCON telephone conference GEN T training GEN TELEX telephone exchange GEN T tropical (air mass) NWS TELRY telegraph reply GEN T true (bearing) GEN TEMP Temperature GEN T/R transportation request GEN TEMPO temporary ICAO TA temperature (PIREP only) ATC TEND Trend ICAO TA total aboard GEN TERPS terminal instrument procedures GEN TA transition altitude ICAO TET Tetrahedron GEN TAC terminal area chart GEN TF terrain following GEN TACAN tactical air navigational aid ICAO TFC traffic ICAO

2−1−28 Decode 8/17/171/5/17 JO 7340.2GJO 7340.2G CHG 2

Contraction Definition Usage Contraction Definition Usage TFMS traffic flow management system ATC TRBL trouble GEN TFR temporary flight restriction GEN TRCV tri-color visual approach slope GEN TFRCD traffic received ATC indicator TFZ traffic zone GEN TRG training ICAO TGL touch and go landing ICAO TRIB tributary NWS TGS taxiing guidance system ICAO TRK track GEN THD Thunderhead NWS TRLVL transition level ICAO THDR Thunder NWS TRML terminal GEN THK Thick NWS TRMT terminate GEN THLD Threshold GEN TRNG Training GEN THN Thin NWS TRNSP Transport GEN THR threshold ICAO TROF Trough NWS THRFTR Thereafter GEN TROP Tropopause NWS THRU through ICAO TRPCD tropical continental (air mass) NWS THRUT Throughout GEN TRPCL Tropical NWS THSD Thousand GEN TRPLYR trapping layer NWS THTN threaten GEN TRRN Terrain GEN THU Thursday ICAO TRSA terminal radar service area GEN TIBA Traffic information broadcast by ICAO TRSN Transition GEN aircraft TRTD Treated GEN TIL until GEN TS team supervisor GEN TINOP transponder inoperative ATC TS Thunderstorm METAR TIP until past ATC TS transmitter station GEN TIPS terminal information processing GEN TSA Transportation Security GEN system Administration TKOF take-off ICAO TSATLC Trans-Atlantic GEN TLM Telemetry ATC TSEC terminal secondary radar beacon GEN TLRNC tolerance GEN TSFR Transfer GEN TLTP too long to print GEN TSGR thunderstorm with hail METAR TLWD tailwind ATC TSGS thunderstorm with small hail METAR TM time (PIREP only) ATC TSMNO transmitting capability out of service GEN TM traffic management ATC TSMOK transmitting capability returned to GEN TMA terminal control area ICAO service TMPA traffic management program alert ATC TSNO thunderstorm information not METAR TMPRY temporary GEN available TMT transmit GEN TSNT Transient GEN TMW tomorrow GEN TSO technical standard order GEN TNA turn altitude ICAO TSPAC Trans-Pacific GEN TNDCY tendency GEN TSPL thunderstorm with ice pellets METAR TNGT tonight GEN TSRA thunderstorm with rain METAR TNH turn height ICAO TSSA thunderstorm with duststorm or sand- METAR TNTV tentative GEN storm TO travel order GEN TSSN thunderstorm with snow METAR TOC to be continued GEN TSTM thunderstorm NWS TOC top of climb ICAO TT teletypewriter GEN TOD time of delivery GEN TTS teletype switching facilities GEN TODA take-off distance available ICAO TTY teletypewriter station GEN TOG take-off gross weight GEN TUE Tuesday ICAO TOP cloud top NWS TURB turbulence ICAO TOR time of receipt GEN TURBC turbulence NWS TOR traffic on request ATC TURBT turbulent NWS TORA take-off run available ICAO T-VASIS T visual approach slope indicator ICAO TOT time of transmission GEN system TOVC top of overcast NWS TVL travel GEN TP turning point ICAO TVOR terminal VOR ICAO TP type aircraft (PIREP only) ATC TWD toward GEN TPA traffic pattern altitude ATC TWEB transcribed weather broadcast GEN TPG topping NWS TWI twilight GEN TR track ICAO TWR aerodrome control tower ICAO TR VFR low altitude training routes GEN TWR tower GEN TRA temporary reserved airspace ICAO TWRG towering NWS TRACAB terminal radar approach control in GEN TWS radar track while scan ATC tower cab TWX teletypewriter exchange service GEN TRACON terminal radar approach control GEN TWY taxiway ICAO facility TWYL taxiway link ICAO TRAD terminal radar GEN TXG taxiing ATC TRAN transient ATC TXL taxilane ICAO TRANS transmit or transmitter ICAO TXT Text ICAO

Decode 2−1−29 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage TYP type aircraft ICAO UNRELBL unreliable GEN TYPH typhoon ICAO UNRR unable to approve route requested ATC TYPNO teletypewriter communications out of GEN UNRSTD unrestricted GEN service UNSATFY unsatisfactory GEN TYPOK teletypewriter communications GEN UNSBL unseasonable NWS returned to service UNSKED unscheduled GEN UNSTBL unstable NWS UNSTDY unsteady NWS UNSTL unsettle NWS U UNTC unable to establish contact ATC UNUSBL unusable GEN UP unknown precipitation METAR Contraction Definition Usage UPDFTS up drafts NWS UPDT update NWS U Intensity unknown (weather reports NWS UPR upper NWS only) UPSLP upslope NWS UA routine PIREP ATC UPSTRM upstream NWS UA unable to approve arrival for the time ATC UQOT unquote GEN specified URAUZ you are authorized GEN UAB until advised by ATC URG urgent GEN UAC upper area control center ICAO URIZR your recommendation is requested GEN UAG upper atmosphere geophysics NWS USA U.S. Army GEN UAR upper air route ICAO USAF U.S. Air Force GEN UAS unmanned aircraft system ICAO USAFIB U.S. Army Aviation Flight GEN UAT until advised by the tower ATC Information UCDWN until cleared down ATC USBL usable GEN UCLT until cleared to land by the tower ATC USCG U.S. Coast Guard GEN UD unable to approve departure for the ATC USMC U.S. Marine Corps GEN time specified USN U.S. Navy GEN UDDF up and down drafts NWS USNO United States Naval Observatory ATC UDF ultra high frequency direction finding ICAO USNOF United States NOTAM Office GEN station USNS United States NOTAM System GEN UERE User Equivalent Range Error ATC USP urgent special observation (weather NWS UFA until further advised GEN reports only) UFN until further notice GEN UTA upper control area ICAO UFO unidentified flying object GEN UTC Coordinated Universal Time ICAO UHA unable higher altitude ATC UTCOK Coordinated Universal Time GEN UHDODT unable higher due opposite direction ATC Coordinate Check Completed traffic UUA urgent PIREP ATC UHDSDT unable higher due same direction ATC UVV upward vertical velocity NWS traffic UW upwind ATC UHDT unable higher due traffic ICAO UWNDS upper winds NWS UHDT unable higher due traffic ICAO UHF ultra high frequency ICAO UIC upper information center ICAO V UIR upper flight information region ICAO ULDT unable lower due traffic ATC ULR untra long range ICAO Contraction Definition Usage UM unable to maintain ATC UN Unable GEN V Variable (weather reports only) NWS UNA Unable ICAO VA victor airways ATC UNAP unable to approve ICAO VA volcanic ash METAR UNAPV unable to approve GEN VAC visual approach chart ICAO UNAR unable to approve altitude requested ATC VAC Visual approach chart (followed by ICAO UNATNDD unattended GEN name/title) UNAVBL unavailable GEN VACAPES Virginia Capes ATC UNCC unable to contact company radio ATC VADA VFR arrival delay advisory ATC UNDLD undelivered GEN VAL in valleys ICAO UNEC unnecessary GEN VAN runway control van ICAO UNHRD unheard GEN VAPS V/STOL approach system GEN UNID unidentified GEN VAR magnetic variation ICAO UNKN unknown GEN VAR visual-aural radio range ICAO UNL unlimited ICAO VARN Variation GEN UNLGTD unlighted GEN VASI visual approach slope indicator GEN UNMON unable to monitor GEN VASIS visual approach slope indicator ICAO UNMON unmonitored ATC system UNOFFL unofficial GEN VC Vicinity METAR/ UNRDBL unreadable GEN TAF UNREL unreliable ICAO VC Vicinity METAR

2−1−30 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Contraction Definition Usage W VCFG fog in vicinity METAR VCNTY vicinity GEN Contraction Definition Usage VCOT VFR conditions on top ATC VCTR Vector ATC W warm (air mass) NWS VCY vicinity ICAO W west or western longitude ICAO VDF very high frequency direction- ICAO W White ICAO finding station WA AIRMET NWS VDOP Vertical Dilution of Precision ATC WAAS Wide Area Augmentation System ICAO VDP visual descent point GEN WAC World aeronautical chart - ICAO 1:1 ICAO VER Vertical ICAO 000 000(followed by name/title) VF maintaining visual flight (Special ATC WAFC world area forecast center ICAO VFR) WAIOP will accept, if offered, the position GEN VFLT visual flight GEN WB Westbound ICAO VFPR via flight planned route ATC WBAR wing bar lights ICAO VFR visual flight rules ICAO WBND Westbound ATC VFRSA VFR restrictions still apply ATC WBRBN will be reported by NOTAM GEN VFY Verify GEN WBRH Weather Bureau Regional Headquar− GEN VHF very high frequency ICAO ters VIA by way of GEN WBTS Whereabouts GEN VIP very important person ICAO WCLC Watch check list completed GEN VIP visual integrated presentation GEN WDC-1 World Data Centers in Western NWS VIS visibility ICAO Europe VLCTY Velocity NWS WDC-2 World Data Centers throughout rest NWS VLF very low frequency GEN of world VLFD via low frequency direct ATC WDI wind direction indicator ICAO VLNT Violent NWS WDLY Widely NWS VLR very long range ICAO WDSPR Widespread GEN VLY Valley NWS WDSPRD Widespread NWS VM voice modulation GEN WEA Weather NWS VMC visual meteorological conditions ICAO WED Wednesday ICAO VNAV vertical navigation (from GEN WEF With effect from, or effective from ICAO TERPS-A1) WFO Weather Forecast Office GEN VOD via omni direct ATC WFP Warm front passage NWS VOL Volume GEN WG Working group GEN VOLMET meteorological information for ICAO WGS World Geodetic System ATC aircraft in flight WGS-84 World geodetic system 1984 ICAO VOPR voice operated relay GEN WI within ICAO VOR VHF omni-directional radio range ICAO WIBIS will be issued GEN VOR/DME VOR and DME (collocated) GEN WICA while in control area ATC VORTAC VOR and TACAN (collocated) ICAO WICZ while in control zone ATC VOT VOR airborne equipment test facility ICAO WID width or wide ICAO VOT VOR test signal GEN WIE with immediate effect or effective ICAO VOT vorticity GEN immediately VOU voucher GEN WILCO will comply GEN VR veer NWS WINT winter NWS VR VFR military training routes GEN WINTEM forecast upper wind and temperature ICAO VRB variable ICAO for aviation VRBL variable GEN WIP work in progress ICAO VRG visual reference gate GEN WK weak GEN VRISL Vancouver Island, BC NWS WKDAY weekday GEN VRT MOTN vertical motion NWS WKEND weekend GEN VSA by visual reference to the ground ICAO WKN weaken GEN VSB visible GEN WL will GEN VSBY visibility NWS WLAV will advise GEN VSBYDR visibility decreasing rapidly NWS WMO World Meteorological Organization GEN VSBYIR visibility increasing rapidly NWS WMSC Weather Message Switching Center GEN VSL vessel GEN WND wind NWS VSP vertical speed ICAO WNW west-north west ICAO VSPI visual glide path indicator GEN WNWRN west-northwestern (weather reports NWS VSTOL vertical/short take-off and landing GEN only) VTOL vertical take-off and landing ICAO WNWWD west-northwestward (weather reports NWS VV vertical visibility (indefinite ceiling) METAR only)

Decode 2−1−31 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Contraction Definition Usage Contraction Definition Usage WO Washington Office GEN XBAR Crossbar ICAO WO without GEN XCP Except NWS WP waypoint GEN XFSS Auxiliary Flight Service Station ATC WPLTO western plateau NWS XH special handling service for aircraft GEN WPM words per minute GEN XNG Crossing ICAO WPRT waypoint report ATC XPC expect NWS WPT waypoint ICAO XPLOS explosive GEN WR wet runway NWS XREP auxiliary report GEN WRA Weather Reconnaissance Area GEN XS atmospherics ICAO WRC well to right of course ATC XTAL crystal GEN WRM warm NWS XTLK cross talk ATC WRMFNT warm front NWS XW crosswind ATC WRNG warning NWS XX heavy (to qualify weather phenom- ICAO WRS worse GEN ena, e.g. XXRA - heavy rain) WS SIGMET NWS WS weak signals ATC WS wind shear ICAO WSCMO Weather Service Contract Meteorolo- GEN gical Observatory WSHFT wind shift NWS Y WSO Weather Service Office GEN WSOM weather service operations manual NWS WSP weather system processor GEN (replacement for LLWAS) WSR wet snow on runway NWS WSSF National Weather Service Support GEN Contraction Definition Usage Facility Y Yukon Standard Time (time groups NWS WSSU National Weather Service Support GEN only) Unit YCZ yellow caution zone (runway ICAO WSTCH wasatch range NWS lighting) WSW west-south west ICAO YD Yards ICAO WSWRN west-southwestern (weather reports NWS YDA Yesterday GEN only) YES Yes (affirmative) ICAO WSWWD west-southwestward (weather reports NWS YKN Yukon NWS only) YL approach light lane ATC WT Weight GEN YLSTN Yellowstone NWS WTR Water NWS YMSG your message GEN WTR well to right ATC YMSGD your message date GEN WTSPT waterspout NWS YR Your ICAO WU Western Union Telegraph Company GEN WV Wave NWS WV wind at altitude (PIREP only) ATC WW severe weather forecast NWS WWW World wide web ICAO WX weather ICAO Z WX weather at altitude (PIREP only) ATC WXCON weather reconnaissance flight pilot NWS report WYAIO will you accept, if offered, the GEN position of Contraction Definition Usage Z Greenwich Mean Time GEN X Z jet terminal area ATC ZI zonal index NWS ZI zone of interior NWS ZM Z marker (VHF station location GEN Contraction Definition Usage marker) X Cross ICAO ZRNO freezing rain information not avail- NWS X Obscured sky condition NWS able (weather reports only)

2−1−32 Decode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Section 2. Encode

EXPLANATION OF CODES Definition Contraction Usage active ACTV GEN GEN − Indicates general aeronautical usage. active or activated or activity ACT ICAO actual time of arrival ATA ATC NWS − Indicates National Weather Service and aero- actual time of departure ATD ATC nautical weather usage. actual time of penetration ATP ATC actual time of release ATRLS ATC ATC − Indicates Air Traffic Control usage. actual wind factor ALWF NWS addition ADDN GEN ICAO − Indicates International Civil Aviation additional traffic is ADNL TFC ATC address ADS GEN Organization usage. International messages should adequate ADQT GEN use these. adirondack ADRNDCK NWS adjacent ADJ ICAO METAR/TAF − Indicates ICAO weather usage. administration ADMIN GEN administrative ADMIV GEN administrator ADMIR GEN A advance ADVN GEN Advance boundary information ABI ICAO Advanced Navigation Routes ANR ATC Definition Contraction Usage advection ADVCTN NWS 1 or 2 octas (eighths) cloud coverage FEW METAR advice ADVC GEN abandon ABND GEN advise ADV NWS abbreviate ABBR GEN advise ADZ ICAO Abbreviated precision approach path APAPI ICAO advise arrival ADZAR ATC indicator advise at what time able AAWTA ICAO Abbreviated T visual approach slope AT-VASIS ICAO advise by air mail as soon as possible ADMAP GEN indicator system advise customs ADCUS GEN abeam ABM ICAO advise disposition ADSPN GEN abnormal ABNML GEN advise if able AIA ATC aboard ABD GEN advise if able to proceed AAP ATC about ABT GEN advise if not correct ADNOK ATC above ABV ICAO advise intentions ADZI ATC above aerodrome level AAL ICAO advise or issue instructions to all ADCON GEN above clouds ACLD GEN concerned above ground level AGL ICAO advise present position and altitude APPA ATC above mean sea level AMSL GEN advise reason for delay ADRDE ATC above mountains MON ICAO advise this office ADZOF GEN above sea level ASL GEN advise when able AWA ATC above transmitted as received ATAR GEN advise when established AWE ATC absolute (temperature) A NWS advisory ADVY NWS abundant ABNDT GEN advisory ADZY GEN accelerate ACLT GEN advisory ADZY ATC accelerate-stop distance available ASDA ICAO advisory ADVZY ATC accept ACPT GEN advisory area ADA ATC acceptance (message type ACP ICAO Advisory Circular AC GEN designator) advisory route ADR ATC access ACES GEN aerial ARL ATC accident ACDNT GEN aerodrome AD ICAO accident notice ACNOT GEN aerodrome beacon ABN ICAO accompany ACPY GEN Aerodrome chart ADC ICAO account ACCT GEN aerodrome control tower TWR ICAO account mechanical AMECH GEN aerodrome flight information service AFIS ICAO account traffic ATFC GEN aerodrome forecast TAF ICAO account weather AWX GEN aerodrome obstacle chart (followed AOC ICAO accumulate ACCUM GEN by type & name/title) acknowledge ACK GEN Aerodrome office (specify service) ADO ICAO acknowledgement of receipt R GEN aerodrome reference point ARP ICAO (message handling) aerodrome traffic zone ATZ ICAO acrobatic ACRBT ATC aerodromes, air routes and ground AGA ICAO across ACRS GEN aids acting ACTG GEN aeronautical AERO GEN activate ACTVT GEN Aeronautical chart 1:500 000 ANC ICAO activate IFR flight plan AIFP ATC (followed by name/title) activate VFR flight plan AVFP ATC aeronautical fixed service AFS GEN

Encode 2−2−1 JO 7340.2G 1/5/17

Definition Contraction Usage Definition Contraction Usage Aeronautical Fixed Telecommunica- AFTN GEN air refueling initial point ARIP ATC tions Network air report AIREP GEN Aeronautical Information Circular AIC GEN Air Rescue Service (USAF) ARS GEN Aeronautical Information Publication AIP ATC Air Reserve Base ARB GEN aeronautical information publications AIP GEN air route surveillance radar ARSR GEN (In General) air route traffic control ARTC GEN aeronautical information regulation AIRAC GEN Air Route Traffic Control Center ARTCC GEN and control air to air A/A ATC aeronautical information service AIS GEN air to ground A/G ICAO aeronautical information specialist AIS GEN air traffic control ATC ICAO aeronautical maps and charts MAP ICAO Air Traffic Control Association ATCA GEN aeronautical mobile satellite service AMSS ICAO air traffic flow management ATFM ICAO aeronautical mobile service AMS GEN air traffic management ATM ICAO Aeronautical navigation chart small ANCS ICAO air traffic manager ATM ATC scale (followed by name/title scale) Air Traffic Organization ATO GEN Aeronautical Radio, Incorporated ARINC GEN air traffic procedures ATP GEN Aeronautical Telecommunications ATN ICAO Air Traffic Procedures Advisory ATPAC GEN Network Committee aeronautical telecommunications op- ATO GEN air traffic representative ATREP GEN erator Air Traffic Service Contingency ATSCCP GEN affect AFCT GEN Command Post affirmative AFIRM GEN Air traffic services inter-facility data AIDC ICAO affirmative AFM ICAO communication After AFT GEN air traffic services reporting office ARO GEN after dark AFDK NWS Air Transport Association of ATA GEN after passing APSG ICAO America Afternoon AFTN GEN air transport pulse radar navigation CPN GEN Again AGN GEN aid Aggregate demand list ADL ATC air transport pulse radar search CPS GEN Agree AGR GEN air transport rating ATR GEN agreement AGRMT GEN air weather service (USAF) AWS GEN Ahead AHD GEN airborne AB ATC air carrier ACR GEN airborne collision avoidance system ACAS ICAO Air Carrier District Office ACDO GEN airborne early warning AEW GEN air combat maneuvers ACM ATC airborne launching ABLCHG ATC air combat training ACT ATC airborne pulse search radar APS GEN Air Defense Control Facility ADCF GEN Airborne Radar Unit ARU GEN Air Defense Emergency ADE GEN aircraft ACFT ICAO air defense identification zone ADIZ GEN aircraft and engine mechanic AEM GEN Air Defense Liaison Officer ADLO GEN aircraft classification number ACN ICAO Air Defense Sector ADS GEN Aircraft communication addressing ACARS ICAO air defense warning ADW GEN & reporting system air evacuation AEVAC ATC aircraft control and warning ACW GEN air express AXPS GEN aircraft departing at (number of ADMIS ATC Air Force Base AFB GEN minutes) intervals Air Force Communications Network AIRCOMNET GEN aircraft earth station AES ICAO Air Force Jet AFJ ATC aircraft identification ACID ATC Air Force NOTAM Exchange Area AFNEA GEN aircraft movement information AMIS GEN Air Force NOTAM Exchange Office AFNEO GEN services Air Force overrun 1000-ft standard AFOVRN MIL aircraft out of commission for parts AOCP GEN approach lighting system Aircraft Owners and Pilots AOPA GEN Air Force Representative to the FAA AFREP GEN Association Air Force Rescue Coordination AFRCC GEN Aircraft parking/docking chart APDC ICAO Center (followed by name/title) air freight AFRT GEN aircraft rescue and fire fighting ARFF ATC air ground AG ATC airmail ARML GEN Air Line Dispatchers Association ALDA GEN Airman s Information Manual AIM GEN Air Line Pilots Association ALPA GEN Airmen s Meteorological AIRMET GEN air mass AMS NWS Information Air Mobility Command AMC ATC AIRMET WA NWS Air National Guard ANG GEN airport AP ICAO air navigation facility ANF GEN airport ARPT GEN air navigation radio aids ANRA GEN airport acceptance rate AARTE ATC air operations network AIROPNET GEN airport arrival rate AAR ATC air refueling AIRFL ATC airport departure rate ADR ATC air refueling control point ARCP ATC Airport Development Aid Program ADAP GEN air refueling egress point AREP ATC Airport District Office ADO GEN air refueling exit AREX ATC airport in sight AIS GEN

2−2−2 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage airport information desk AID GEN all offices having send-receive tele- ALCKT GEN airport layout plan ALP GEN typewriter service on circuit airport lights APL GEN all quadrants ALQDS NWS airport manager AMGR GEN all radar ATC facilities in service ALRAFAC GEN airport of entry AOE GEN area airport operating certificate AOC GEN all regional/service area offices ALRGN GEN airport radar service area ARSA ATC all sectors ALSEC NWS airport reference point ARP GEN all technical operations ALAFFO GEN airport rescue and fire fighting alarm ARFFOK ATC all up weight (gross weight) AUW GEN checked all weather landing AWL ATC airport reservation position ARP GEN Allegheny ALGHNY NWS Airport Reservations Office ARO GEN allotment advice ADVALT GEN airport surface detection equipment ASDE GEN allowable take-off gross weight ATOG GEN airport surveillance radar ASR GEN aloft ALF NWS airport system plan ASP GEN along ALG GEN Airport Traffic Control Tower ATCT GEN already had A/H ATC airports program report APR GEN alternate or alternating ALTN ICAO air-report ARP GEN alternate (aerodrome) ALTN ICAO Airspace ASP GEN alternate airport ALTPT GEN airspace docket ASD GEN alternate departure route ADRT ATC airspace flight inspection pilot ASIP GEN altimeter ALTM GEN Airspace Reservation Unit ARU GEN altimeter check location ACL ATC (Canadian) altimeter setting ALSTG GEN airway AWY ICAO altimeter setting indicator ASI GEN airways engineer AENG GEN altimeter sub-scale setting to obtain QNH ICAO Alaskan Air Command AAC GEN elevation when on the ground Alaskan Region, FAA AAL GEN Altimetry system error ASE ICAO Alaskan Standard Time (time groups A NWS altitude ALT ICAO only) altitude radial ARAD ATC Alberta ALTA NWS altitude reservation ALTRV GEN alert notice ALNOT GEN altitude reservation void for aircraft AVANA ATC alert phase code (alerting service) ALERFA ATC not airborne by --- alerting ALR ICAO altocumulus AC NWS Aleutian ALUTN NWS altocumulus castellanus ACC NWS alighting area ALA GEN altostratus AS NWS alignment ALNMT GEN amber A GEN all (when used as prefix) AL GEN ambiguity AMB GEN all accident notice offices ALANO GEN amend / amended forecast AMD GEN/ all air carrier field offices ALACFO GEN amended clearance AMCL ATC all air defense liaison officers in ALADLO GEN amended route of flight AMRF ATC service area amendment AMDT ICAO all air route traffic control centers in ALARTC GEN American Meteorological Society AMS NWS service area American Telephone and Telegraph ATT GEN all air traffic (area) supervisors in ALATAS GEN Company service area amount AMT GEN all air traffic field facilities ALATF GEN amplifier or amplify AMP GEN all air traffic field offices ALATFO GEN amplitude AMPLTD NWS all air traffic service personnel in ser- ALAT GEN analysis ANLYS NWS vice area announce ANNC GEN all technical operations ALAFFO GEN annual leave AL GEN all air traffic combined station/ ALCS/C GEN anomalous propagation AP ATC centers in service area answer ANS GEN all air traffic combined station/towers ALCS/T GEN ante meridiem AM NWS in service area antenna ANT GEN all ATC towers in service area ALTWR GEN anticipate ANCPT GEN all concerned notified ACN GEN anticyclonic ACYC NWS all FAA field offices and personnel ALFAA GEN Appalachian APLCN NWS all FAA offices on NADIN ALFAB GEN apparent APRNT GEN all flight service stations in service ALFSS GEN appear APPR GEN area appoint APNT GEN all flight standards field offices ALFSFO GEN approach APCH ICAO all international aeronautical tele- ALIATSC GEN approach and departure control AADC ATC communication switching centers approach control A/C ATC all international air traffic switching AIATSC GEN approach control or approach control APP ICAO centers office all international field offices ALIFO GEN approach end runway AER GEN all international flight service ALIFSS GEN approach light lane YL ATC stations in service area approach light system ALS ICAO

Encode 2−2−3 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage approach path alignment panel APAP GEN ATC radar beacon system ATCRBS GEN Appropriate APROP GEN ATC requests ATCR ATC Approval APVL GEN ATC specialist ATCS GEN approval request APREQ GEN ATC tower, approach and departure TAD ATC approve APV GEN control facility approximate APRX GEN Atlantic ATLC NWS Apron APN ICAO Atlantic Route AR ATC arctic (air mass) A NWS atmospheric pressure at airport QFE ICAO area airports checked ARAC ATC elevation Area chart ARC ICAO atmospherics SFERICS NWS area command post ACP GEN atmospherics XS ICAO area control center ACC ATC ATS/MET reporting point MRP ICAO area forecast ARFOR GEN Attach ATCH GEN area forecast FA NWS Attempt ATMT GEN area forecast center AFC NWS attempt to contact ATMTC ATC area minimum altitude AMA ICAO attempt to locate ALCT GEN area navigation RNAV ICAO Attend ATND GEN area notice ARNOT GEN Attention ATTN GEN area positive control APC ATC Aurora Borealis AURBO NWS Army Air Field AAF GEN authentication maneuver ATM ATC Army Liaison Officer ARLO GEN Authority AUTH GEN Army National Guard RNG GEN authority granted AUGRA GEN Army radar approach control facility ARAC GEN authority is requested AUREQ GEN around ARND GEN authorization for interceptor AFIO ATC arrange ARNG GEN operations arresting ARST ICAO authorize AUZ GEN arresting gear A-GEAR GEN authorized or authorization AUTH ICAO arrival aircraft interval AAITVL ATC automated flight information service FISA ICAO arrival approved request for IFR AI ATC Automated Flight Service Station AFSS GEN flight Automated Mutual-Assistance Vessel AMVER ATC arrival delay ADLY ATC Rescue System arrival or arrive ARR ICAO Automated Radar Terminal Systems ARTS GEN arrival report will be filed with FIRIV ATC automated surface observing system ASOS NWS arrival unknown ARUNK ATC automatic AUTO ICAO artic control area ACA ATC automatic broadcast ABCST GEN as soon as possible ASAP GEN automatic carrier landing system ACLS GEN as soon as possible SAP ICAO automatic data processing ADP GEN ascend ASND GEN automatic data processing equipment ADPE GEN ascent to ASC GEN automatic data processing systems ADPS GEN ASOS automated observation with AO2 NWS automatic dependent surveillance ADS ICAO precipitation discriminator (rain/ Automatic Dependent Surveillance− ADS−B ICAO snow) Broadcast ASOS automated observation without AO1 METAR automatic dependent surveillance ADSU ICAO precipitation discriminator (rain/ unit snow) automatic direction finder ADF GEN asphalt ASPH ICAO automatic direction finder approach ADFAP ATC assign ASGN GEN automatic error correction equipment ARQ GEN Assigned altitude deviation AAD ICAO automatic ground air/ground AGACS GEN assistant ASST GEN communication system assistant chief AC GEN automatic instrument landing system AILS GEN associate ASSOC GEN Automatic Meteorological Observing AMOS GEN assumed ASMD ATC System at all times AATM GEN Automatic Network Management ANMS GEN at and maintain ATAM ATC System at least (altitude) AL/(---) ATC automatic scanning control unit ASCU GEN at or above AOA ATC automatic scanning unit out of SCANO GEN at or after AOAF ATC service at or before AOBF ATC automatic scanning unit returned to SCAOK GEN at or below AOB ATC service at sea MAR ICAO automatic send/receive AS/R GEN at the coast COT ICAO automatic terminal information ATIS ICAO at this time ATTM GEN service ATC advises ATCA ATC automatic weather broadcast AWBE GEN ATC assigned airspace ATCAA ATC equipment ATC beacon interrogator ATCBI GEN automatic weather observing/ AWOS GEN ATC clears ATCC ATC reporting system ATC facility ATCF GEN automatic weather reporting system AUTOB GEN ATC operations representative ATCOR GEN

2−2−4 Encode 1/5/17 JO 7340.2G

Definition Contraction Usage Definition Contraction Usage auxiliary AUX GEN beneath BNTH GEN Auxiliary Aviation Weather Facility AAWF NWS Bering Standard Time (time groups B NWS Auxiliary Flight Service Station XFSS ATC only) auxiliary report XREP GEN Berkshire BRKSHR NWS available or availability AVBL ICAO Bermuda BDA NWS average AVG GEN better BTR GEN aviation AVN GEN between BTN ICAO Aviation Area Forecast Center FA CENTER GEN between BTWN NWS aviation gasoline AVGAS ICAO between layers BTL ICAO aviation routine weather report METAR ICAO Beyond BYD GEN aviation selected special weather SPECI METAR bids accepted for the following BAFVC GEN report vacancies Aviation Weather and NOTAM Sys- AWANS GEN bids solicited BDSLD GEN tem bids solicited as follows BSAF GEN aviation weather processors AWP NWS bird sweep completed BSC ATC await or awaiting AWT GEN Black Hills BLKHLS NWS azimuth AZM ICAO Blanket BLKT NWS azimuth and range data AZRAN ATC Blizzard BLZD NWS Block BLX ATC Blowing BL METAR B blowing dust BLDU METAR blowing sand BLSA METAR blowing snow BLSN METAR Definition Contraction Usage blowing spray (weather reports only) BY METAR Blue B GEN back course BC GEN Bomber BMBR GEN back course marker BCM GEN Bombing BOMB GEN back taxiing BT ATC Border BDR GEN backing BCKG NWS Bound BND GEN backup emergency communication BUEC GEN boundary BDRY ICAO backup interceptor control BUIC ATC boundary BNDRY NWS Bahama Route BR ATC braking BRKG ICAO balance BAL GEN braking action BA ICAO balloon BLN GEN braking action fair BRAF GEN baroclinic or baroclinic prognosis BACLIN NWS braking action good BRAG GEN barometer BRM NWS braking action nil BRAN GEN barotropic or barotropic prognosis BATROP NWS braking action poor BRAP GEN base leg B ATC branch BR GEN base of overcast BOVC NWS break BRK NWS Base Operations Office BASOPS GEN breaks in higher overcast BRKHIC NWS basic meteorological services BMS NWS breaks in overcast BINOVC NWS beach BCH NWS brief BRF NWS beacon BCN ICAO bright BRGT GEN beacon data (digitized) BDAT ATC bright radar indicator tower BRITE GEN bearing BRG GEN equipment become BCM GEN British Columbia BC NWS becoming (expected between 2 digit BECMG TAF broadcast BCST ICAO beginning hour and 2 digit ending broadcast requested BCREQ ATC hour) broadcast station BCSTN GEN Before BFR GEN broken BKN METAR before dark BFDK NWS build BLD NWS before encountering IFR conditions BIFR ATC building BLDG ICAO before proceeding on course BPOC ATC buildup BLDUP NWS began or begin BGN GEN bulletin BUL GEN begin or beginning descent BGND ATC bureau BUR GEN begin standard refuel orbit BSRO ATC business BUS GEN beginning climb BC ATC buzzer (radar) BZR GEN beginning of precipitation (time in B NWS by visual reference to the ground VSA ICAO minutes) (weather reports only) by way of VIA GEN beginning procedure turn BPT ATC bytes per second BPS GEN beginning standard holding BSHP ATC procedure beginning standard range approach BSRAP ATC C beginning straight-in approach BSIAP ATC Behind BHND GEN Below BLO GEN Definition Contraction Usage Below BLW ICAO calibration CLBR ICAO below all clouds BAC ATC calibration performance monitoring CPME ATC below clouds BLO ICAO equipment

Encode 2−2−5 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage Call sign CS ICAO changeover point COP GEN Calling CLG ICAO changing over CHGO ATC Canada CAN NWS channel CH ICAO Canadian CNDN NWS channel CHNL GEN Canadian Airspace Reservation Unit CARU GEN chapter CHAP GEN Canadian Armed Force CANFORCE GEN characteristic CHARC GEN Canadian Armed Forces Transport CAM GEN charge CHRG GEN Command charter CHTR GEN Canadian Forces Air Defense CFADC GEN check CK ICAO Command check area airports CARA GEN Canadian NORAD Region CANR GEN check okay CHOK GEN Canadian NOTAM CANOT GEN chemicals CHM GEN cancel CNCL NWS Chesapeake CHSPK NWS cancel CNL GEN chief controller CCTLR GEN cancel approved arrival CXA ATC Chief, Airport District Office CADO GEN cancel approved departure CXD ATC circle CRC GEN cancel flight plan CNLFP ATC circling (approach and landing C ATC cancel IFR clearance previously CIFR ATC charts) given circling guidance light CGL ICAO cancel IFR flight plan CIFP ATC circuit CKT GEN cancel VFR flight plan CVFP ATC circuit line up CLU GEN candela CD ICAO circuit notice CIRNOT GEN capable CPBL GEN circular polarization CP GEN capacity CPTY GEN circulate CRLC GEN captain CAPT GEN circumnavigate CIRNAV ATC carbon copy CC GEN cirrocumulus CC NWS Caribbean CARIB NWS cirrostratus CS NWS carryover from previous log CFPL ATC cirrus CI NWS cascades CASCDS NWS City (or County) Civil Defense CCD GEN catalogue number CANO GEN Director at____ category CAT ICAO civil CIV ICAO category CTGY NWS civil air carrier turbojet CACT GEN cathode ray tube CRT GEN Civil Air Patrol CAP GEN Catskills CTSKLS NWS civil defense CD GEN caution CTN GEN civil engineer CENGR GEN caution advised until further notice CAUFN GEN civil reserve air fleet CRAF GEN ceiling CIG NWS clarify CFY GEN celestial CLST ATC Class A Airspace CAAS ATC celestial navigation CELNAV GEN Class B airspace CBAS ATC celsius C GEN Class B surface area CBSA ATC center CNTR GEN Class C airspace CCAS ATC center clearance delivered B ATC Class C surface area CCSA ATC centerline CNTRLN GEN Class D airspace CDAS ATC centimeter CM ICAO Class D surface area CDSA ATC central CNTRL GEN Class E airspace CEAS ATC central altitude reservation function CARF GEN Class E surface area CESA ATC Central Computer Complex CCC GEN Class G airspace CGAS ATC central flow weather service unit CFWSU GEN clears, or cleared to, or clearance CLR ICAO Central North Pacific CENPAC ATC clear above (PIREP only) CA ATC Central Region, FAA ACE GEN clear air turbulence CAT GEN Central Standard Time (time groups C NWS clear and smooth CLRS NWS only) clear of clouds CCLDS ATC center weather service unit CWSU GEN clear or scattered clouds and visibil- CAVU NWS centre (runway ID) C ICAO ity greater than ten miles centre line CL ICAO clear or scattered clouds and DCAVU NWS certificate CERT GEN visibility greater than ten, remainder certification CERTIF GEN of report missing (weather reports certify CRTFY GEN only) chance CHC NWS clear type of ice formation CLA ICAO change CHG GEN clearance CLNC GEN change frequency to CF ICAO clearance delivery CD GEN change of appointing office CAO GEN clearance void if not off CVINO ATC change to approach control or chan- CAC ATC cleared as planned CLRAP ATC ging to approach control cleared Customs CCUS GEN change to center control or changing CTCC ATC cleared for approach CFAP ATC to center control cleared to fix F ATC change weight manifest CWM GEN clearway CWY ICAO changeover CHOV ATC climb CLB ATC

2−2−6 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage climb and cross CATX ATC compact CMPCT GEN climb and cruise CCRZ ATC company CO GEN climb at pilot s discretion CAPD ATC compare COMPR GEN climb en route CER ATC compartment COMPRT GEN climb immediately CLBI ATC compass locator COMLO GEN climb on course COC ATC compass locator at ILS middle mark- LMM GEN climb so as to cross CSATX ATC er climb so as to reach CSATR ATC compass locator at ILS outer marker LOM GEN climb to and cross CTAX ATC complete CMPLT GEN climb to and maintain CTAM ATC complete crew CCRU GEN climb to or climbing to CMB ICAO complete or completed or completion CMPL ICAO climb well to right CWTR ATC complete power failure CPF GEN climb well to right of course CWRC ATC completed procedure turn COPT ATC clockwise CLKWS GEN complex CMPLX GEN clockwise orbit CLKOB ATC component CMPT GEN close of business COB GEN composite flight data processing CFAD GEN close this office CLOTO GEN composite radar data processing CRAD GEN closed CLSD ICAO composition CMPSN GEN closing date CLODA GEN computer display channel CDC GEN closing station CL GEN computerized voice reservation CVRS ATC cloud CLD NWS system cloud and visibility OK CAVOK NWS concrete CONC ICAO cloud base BASE GEN concurrently CNCNT GEN cloud top TOP NWS condensation trails CONTRAILS NWS Coarse/Acquisition C/A ATC condition COND ICAO coast CST NWS confidence CONFDC NWS Coast Guard CG GEN confidential CONF GEN Coast Guard Air Station CGAS GEN configuration CONFIGN GEN Coast Guard LORAN Station CGLS GEN configuration CONFIG ATC coastal zone management CZM GEN Cockpit voice recorder CVR ICAO confine CFN GEN Code of Federal Regulations CFR GEN confirm CFM GEN cold (air mass) K NWS Confirm or I confirm CFM ICAO cold front CDFNT NWS confirming requisition follows COREQ GEN cold front passage CFP NWS congestion CGSTN GEN collaborative convective forecast CCFP ATC connect CNCT GEN product consider CSDR GEN collaborative decision making CDM ATC considerable CSDRBL GEN collect COLL GEN consistent CNSTNT GEN collision avoidance system CAS GEN consol beacon CONSOL GEN colon CLN GEN CONSOLAN Facility CONSO GEN combine COMB GEN consolidate CSLDT GEN combined approach control/ CAP/IS GEN Consolidated NOTAM System CNS ATC international station construction CONST ICAO combined center/RAPCON CERAP GEN construction maintenance supervisor CMS GEN combined station/center CS/C GEN contact CTC ICAO combined station/tower CS/T GEN contact approach control CAC ATC comma CMA GEN contact center CTCEN ATC Commander in Chief, North Americ- CINCNORAD GEN contact center control CTCC ATC an Aerospace Defense Command continental (air mass) C NWS commence CMNC GEN continental control area CCA GEN commercial COML GEN Continental Divide CONTDVD NWS commercial broadcasting station BS ICAO Continental NORAD Region CONR GEN commission CMSN GEN continue calling until CONCA ATC common aviation weather subsystem CAWS NWS continue(s) or continued CONT ICAO common ICAO data interchange net- CIDIN ICAO continue to hold CONTH ATC work continuous CONS ICAO Common IFR Room CIFRR GEN continuous 24-hour service H24 ICAO common terminal radar approach CTRAC GEN continuous wave CW ICAO control contract CONTR GEN common traffic advisory frequency CTAF ATC control CTL ICAO communication COM ICAO control area CTA ICAO communications duty officer CDO GEN control area CTLA GEN communications equipment CE GEN control boundary CTLB GEN communications instructions for re- CIRVIS ATC control zone CTLZ GEN porting vital intelligence sightings control zone CTR ICAO communications, navigation and sur- CNS ICAO controlled airspace CTAS ATC veillance controlled firing area CFA ATC

Encode 2−2−7 JO 7340.2G 1/5/17

Definition Contraction Usage Definition Contraction Usage controller CTLR GEN data link DOLLY GEN controller in charge CIC GEN Data link Automatic Terminal D-ATIS ICAO Controller-pilot data link CPDLC ICAO Information Service communications Data link initiation capability DLIC ICAO Controllers Operations and COPCOM GEN Data link VOLMET D-VOLMET ICAO Procedures Committee data terminal equipment DTE GEN convective CNVTV NWS data transmission feature DTF GEN convene CVN GEN data transmission request DTR GEN converge CNVG GEN date of birth DOB GEN conversion CNVSN GEN date time group DTG GEN convert CNVRT GEN Davide J. Hurley ATC Systems Com- ATCSCC GEN coordinate COORD GEN mand Center Coordinated Universal Time UTC ICAO daybreak DABRK NWS Coordinated Universal Time UTCOK GEN daylight DALGT GEN Coordinate Check Completed dead reckoning DR ATC Coordinates COORD ICAO decelerate DCLRT ATC coordination CDN ICAO decibel DB GEN correct or corrected or correction COR GEN decision altitude DA ICAO corridor assignment CORAS ATC decision height DH ICAO counterclockwise CCLKWS NWS decommission DCMSN GEN counterclockwise orbit CCLKOB ATC decrease DCR GEN county CO GEN deep DP NWS coupled CPD GEN deepening DPNG NWS course CRS GEN defense DEF GEN course line CL ATC defense combat maneuvers DCM ATC cover COV ICAO Defense Commercial DECCO GEN cover CVR GEN Communications Office crash locator beacon CLBN GEN Defense Communications Agency DCA GEN crash phone activated CPA GEN defense communications system DCS GEN crew chief CRCHF GEN Defense Mapping Agency Aerospace DMAAC GEN cross X ICAO Center cross talk XTLK ATC Defense Mapping Agency DMAHC GEN crossbar XBAR ICAO Hydrographic Center crossing XNG ICAO Defense Nuclear Agency DNA GEN crosswind XW ATC Defense Readiness Conditions DEFCON GEN cruise CRZ ICAO Defense Switching Network DSN GEN cruise and maintain CRZAM ATC defense VFR DVFR GEN cruise well to right CRZWTR ATC definite DFNT GEN Cryptographic CRYPTO GEN degree DEG ICAO Crystal XTAL GEN delay or delayed DLA ICAO Cumuliform CUF ICAO delay account of DLAC ATC Cumulonimbus CB NWS delay clearance or delayed clearance DLC ATC cumulonimbus mamma CBMAM NWS delay indefinite DI ATC Cumulus CU NWS delay time DLAT ATC cumulus fractus CUFRA NWS delayed RTD ICAO current flight plan CPL ICAO delete DLT GEN Customs CUST ICAO deliver DLVR GEN customs has been notified CUSNO GEN deliver by telephone DELPHO GEN Cyclic redundancy check CRC ICAO delivery DLVY GEN Cyclogenesis CYCLGN NWS demolition DEMOL GEN Cyclonic CYC NWS demonstration DMSTN GEN Cylinder CYL GEN dense DNS NWS dense upper cloud DUC ICAO depart DEP ATC D department DEPT GEN Department of Commerce DOC GEN Department of Defense DOD GEN Department of Energy DOE GEN Definition Contraction Usage Department of Transportation DOT GEN Daily DLY GEN departure DEP ICAO Daily DLY ICAO departure approval request for IFR DI ATC daily flight log DFL GEN flight Dakotas DKTS NWS departure approved DA ATC damage DMG GEN departure end of runway DER ICAO danger DGR GEN departure procedure DPCR ATC danger DNG ICAO Deployment Readiness Review DRR ATC danger area D ICAO depth DPT ICAO dangerous cargo DGCGO GEN depth DPTH NWS

2−2−8 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage deputy chief DCF GEN disregard DSRGD GEN Deputy Commander for Operations DO GEN disseminate DISEM GEN descend DSND ATC dissipate DSIPT NWS descend at pilot s discretion DAPD ATC distance DIST ICAO descend immediately DSNDI ATC distance DSTC GEN descend so as to cross DSATX ATC distance from touchdown indicator DFTI GEN descend so as to reach DSATR ATC distance measuring equipment DME ICAO descend to and cross DTAX ATC Distance Root Mean Square DRMS ATC descend to and cruise DCRZ ATC distant DSNT GEN descend to and maintain DTAM ATC distant early warning DEW GEN descend to or descending to DES ICAO distant early warning identification DEWIZ GEN descend well to right DWTR ATC zone descend well to right of course DWRC ATC distinguished visitors DV GEN descent DSCNT ATC distort DST GEN describe DB GEN Distress Phase Code (Alerting DETRESFA ATC designate a friction value MU GEN Service) representing runway surface distribute DISTR GEN conditions (Greek letter) district DIST GEN designated DSGND GEN district airport engineer DAE GEN desire DSR GEN ditto DO GEN destination DESTN GEN diverge DVRG GEN destined DSTND ATC diversion DVRSN GEN detail DTL GEN divert DIV ICAO deteriorate DTRT NWS division DIV GEN determine DTRM GEN DME-collocated with glide slope DMEG GEN develop DVLP GEN DME-collocated with localizer DMEL GEN deviation DEV ATC DME-collocated with VOR DMEV GEN deviation approved as requested DAAR ATC DME-tactical air navigation with DMER GEN dew point DWPNT NWS DME only commissioned dew point temperature DP ICAO do all possible DAP GEN diagonal DGNL GEN do not pass to Air Defense radar NOPAR ATC diameter DIAM GEN Do you intend to ask me for a series QDL ICAO difference in depth of modulation DDM GEN of bearings? Or I intend to ask you differs DFRS GEN for a series of bearings difficult DFCLT GEN docking DCKG ICAO diffuse DFUS GEN document DCMT GEN diffuse DIF ICAO doing business as DBA GEN digital altimeter setting indicator DASI GEN domestic DOM ICAO Digital−Automatic Terminal Infor- D−ATIS ATC domestic services (island operations) DS GEN mation Service dominant DMNT GEN digital barometer altimeter setting in- DBASI GEN doppler VHF omni-directional radio DVOR ICAO dicator range Digital flight data recorder DFDR ICAO double DBL GEN diminish DMSH NWS double channel duplex DCD ICAO Diplomatic Telecommunications Ser- DTS GEN double channel simplex DCS GEN vice double sideband DSB ICAO direct DCT ICAO doubtful DBTF GEN direct DRCT GEN downdrafts DWNDFTS NWS direct altitude and identification DAIRE GEN downslope DNSLP NWS readout equipment downstream DNSTRM NWS Direct controller-pilot communica- DCPC ICAO downward vertical velocity DVV NWS tions downwind DNWND ATC direct current DC GEN drawing DWG GEN direct readout infrared DRIR GEN drift DRFT NWS direct route DR GEN drizzle DRZL NWS direct user access terminal system DUATS GEN drizzle DZ ICAO direction DRCTN GEN dual tandem wheels DTW ICAO Directives Management Officer, FAA DMO GEN dual wheels DW ICAO director DIR GEN duplex DX GEN disabled DISABLD GEN duplicate DUPE GEN discontinue DISC GEN duration DUR ICAO dispersal DSPRL GEN duration DURN GEN displace DSPLC GEN during DRG ICAO Displaced runway threshold DTHR ICAO during DURG GEN display DSPL GEN during climb DURC ATC disposition DSPN GEN during descent DURD ATC

Encode 2−2−9 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage duststorm, sandstorm, rising dust or SA METAR en route penetration EP ATC sand en route metering ERMG ATC dust devils PO METAR en route radar (broadband) ERAD GEN en route secondary radar beacon ESEC GEN (broadband) E en route sequencing program ESP ATC en route spacing program ERSP ATC en route surveillance radar RSR ICAO en route tracking automatic radar ser- ETARS ATC Definition Contraction Usage vice each thousand foot level ETFL ATC encounter ENCTR GEN Early ERY GEN encrypt for transmission only EFTO GEN early departure authorized EDA GEN end exercise point EEP GEN east or eastern longitude E ICAO ending ENDG GEN eastbound EB ICAO ending of precipitation (time in E NWS eastbound EBND GEN minutes) (weather reports only) Eastern Region, FAA AEA GEN endurance ENDCE GEN Eastern Standard Time (time groups E NWS engine ENG ICAO only) engineer ENGR GEN eastern test range ETR ATC Engineering and Manufacturing EMDO GEN east-north east ENE ICAO District Office east-northeastern (weather reports ENERN NWS engine-generator E/G GEN only) enhanced ENHNCD GEN east-northeastward (weather reports ENEWD NWS enhancement ENHNCMNT GEN only) en-route ENR ICAO east-south east ESE ICAO En-route chart (followed by name/ ENRC ICAO east-southeastern (weather reports ESERN NWS title) only) enter control area ECA ATC east-southeastward (weather reports ESEWD NWS enter controlled airspace ECAS ATC only) entered on duty EOD GEN effect EFCT GEN entering air defense identification EADIZ ATC effective EFF GEN zone elapsed time ETIM ATC entire ENTR GEN electric ELEC GEN entire field available EFA GEN electrical engineer EENGR GEN environment meteorological support EMSU NWS electrician ELECN GEN unit electronic counter measure mission ECMSN ATC equatorial (air mass) E NWS electronic counter measures ECM GEN equipment EQPT ICAO electronic equipment modification EEM GEN equipment EQUIP GEN electronic geographic coordinator EGECON GEN equipment certified EQCRT GEN navigation system equivalent airspeed EAS ATC electronic installation technician EIT GEN Error (to be used in AFS as a EEE ICAO electronic maintenance inspector EMI GEN procedure signal) electronic maintenance technician EMT GEN especially SPCLY GEN electronic mechanic technician ELMT GEN essential ESNTL GEN electronic specialist ECSP GEN establish ESTAB GEN electronic technician ET GEN estimate or estimation EST ICAO electronic unit EU GEN estimated departure clearance (time) EDCT ATC electronic voice switching system EVS GEN estimated elapsed time EET ICAO elevate or elevation ELEV ICAO estimated information ETI ATC elliptical ELIP GEN estimated latitude ELAT GEN elongate ELNGT NWS estimated longitude ELONG GEN elsewhere ELSW GEN estimated off-block time EOBT ICAO embedded EMBDD NWS estimated time en route ETE GEN embedded (in cloud layer) EMBD ICAO estimated time of arrival ETA GEN emergency EMERG ICAO estimated time of departure ETD GEN emergency gear EG GEN estimated time of penetration ETP ATC emergency location beacon - aircraft ELBA ICAO estimated time over ETOV ATC emergency locator transmitter ELT GEN estimated time over significant point ETO ICAO emergency security control of air ESCAT GEN et cetera ETC GEN traffic Europe, Africa, and Middle East AEU GEN emergency use only EUO GEN Office, FAA emission EM ICAO Evacuation EVAC GEN en route ENRT GEN evaluate or evaluation EVAL GEN en route automated radar tracking EARTS GEN Evening EVE GEN system Every EV ICAO en route communications ECOM GEN examination EXAM GEN en route communications RCOM GEN Except EXC ICAO

2−2−10 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage Except EXCP GEN fan marker approach FMAP ATC Except XCP NWS fan marker located with radio beacon FMH GEN except change departure to read ECD ATC farther or further FTHR GEN except change route to read ECR ATC Fault Detection and Isolation FDI ATC Exchange EXCH GEN feathered FTHRD ATC exchange and repair E/R GEN federal aid to airports program FAAP GEN Exclude EXCLD GEN Federal Aviation Administration FAA GEN Exclusive EXCLV GEN Federal Aviation Regulations FAR GEN Execute EXCT GEN Federal Communications FCC GEN Executive EXEC GEN Commission Exercise EXER ICAO Federal Telecommunications System FTS GEN expanded position indicator EPI ATC feet FT ICAO expanded quota flow EXQF ATC feet per minute FPM GEN expanded service volume ESV GEN field FLD ICAO Expect EXP ICAO field condition FICON GEN Expect EXPC GEN field condition report FCRP ATC Expect XPC NWS figure FIG GEN expect approach clearance EACLN ATC filament FIL GEN expect approach clearance not later EACNL ATC filed but impracticable to transmit FIBI NWS than filed flight plan FPL ICAO expect departure clearance at EDC ATC filed flight plan in the air AFIL GEN expect departure release at EDR ATC filed IFR flight plan FIFP ATC expect further clearance at EFC ATC filed VFR flight plan FVFP ATC expect further routing EFR ATC filing time FT GEN expect higher altitude EHA ATC filling FILG NWS expect vector to EVT ATC final approach FA ATC expected approach time EAT ATC final approach FNA ICAO expected operations forecast EOF NWS final approach fix FAF ICAO expedite EXPED GEN final approach point FAP ICAO expedite delivery EXDLVY GEN fire warning FWRNG GEN expedite delivery by telephone EXPHO GEN firing FIRG GEN expedite mail reply EXREP GEN firing FRNG ICAO expedite shipment EXSHI GEN first FST ICAO explosive XPLOS GEN first available FIRAV GEN express EXPS GEN fixed federal monitoring network FFMN GEN extend EXTD GEN fixed pulse radar navigation aid FPN GEN extension EXTN GEN fixed wing special IFR FW/SIFR GEN extensive EXTSV GEN fixed wing special VFR FW/SVFR GEN extra long range ELR ICAO fixed-base operator FBO GEN extra section EXSEC GEN fix-radial-distance FRD ATC extrapolate EXTRAP NWS flares FLR ICAO extreme EXTRM NWS flash advisory FL NWS extremely high frequency (30000 to EHF ICAO flashing FLG ICAO 300000 MHz) Fleet Area Controlled and FACSFAC ATC Surveillance Facility Fleet Weather Central FWC NWS F flight FLT ICAO flight check FLTCK ICAO flight data FDAT GEN Flight Data Center FDC GEN Definition Contraction Usage flight data entry and printout FDEP ATC FAA Contract Flight Service Station FCFSS GEN flight data input/output FDIO ATC FAA Contract Weather Observing FCWOS GEN flight data input/output repeater FDIOR ATC Station flight data position FLIDAP GEN FAA requirements FAAR GEN Flight data processing system FDPS ICAO facilitation of international air FAL ICAO flight engineer FE GEN transport flight information (permanent) FI/P GEN facilities FAC ICAO flight information (temporary) FI/T GEN facility FAC GEN Flight Information Center FIC GEN facility chief FACF GEN flight information publication FLIP GEN facility coordination officer FCO GEN Flight Information Region FIR GEN facsimile FAX GEN Flight Information Region Boundary FIRB GEN fahrenheit F GEN flight information service FIS GEN fahrenheit FAH NWS flight inspection F GEN falling FLG NWS Flight Inspection District Office FIDO GEN familiar or familiarization FAM GEN Flight Inspection Field Office FIFO GEN familiarization flight FFLT GEN Flight Inspection Field Office - High FIFO-H GEN fan marker FM GEN Altitude

Encode 2−2−11 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage flight inspection group FIG GEN freezing level FRZLVL NWS flight level FL GEN freezing rain FZRA METAR Flight management system FMS ICAO freezing rain information not avail- ZRNO NWS flight orders FLTO GEN able (weather reports only) flight path deviation indicator FPDI GEN freezing rain sensor not available FZRANO METAR flight plan FP GEN frequency FREQ ICAO flight plan PLN ICAO frequency change approved FCA ATC flight plan area FPA ATC frequency division data link FDDL GEN flight plan not received FPNO GEN frequency management officer FMO GEN flight plan route FPR GEN frequent FQT GEN flight progress board FPB ATC frequent FRQ ICAO flight schedule monitor FSM ATC Friday FRI ICAO Flight Service Station FSS ICAO from FM ICAO Flight Standards District Office FSDO GEN From (used to precede the call sign DE ICAO Flight Standards National Field FSNFO GEN of the calling station) Office from present position FPP ATC flight strip printer FSP GEN front FNT NWS flight watch area FWA GEN frontal passage FROPA NWS flight watch control station FWCS GEN frontal surface FROSFC NWS flight watch outlet FLTWO GEN frontogenesis FNTGNS NWS flight watch point FWP GEN frontolysis FNTLYS NWS flight watch specialist FWS GEN frost FRST NWS flight watch unit FWU GEN frozen FRZN NWS flood stage FLDST NWS FSS assumes control of tower FATFL GEN flood warning issued FLWIS NWS frequencies and lights florescan instrument landing system FILS GEN FSS assumes flight-plan area and FAFAB GEN flow control time of arrival FCTA ATC Service B flow management unit FMU ICAO FSS guarding Service B FGSB GEN fluctuating FLUC ICAO FSS returns control of tower FRTFL GEN fluctuation FLCTN GEN frequencies and lights fluorescent runway lighting (flood- FLORL GEN FSS returns flight-plan area and FRFAB GEN light system) Service B flurry FLRY NWS FSS returns Service B FRSB GEN fly runway heading FRH ATC fuel advisory FA ATC fog FG METAR fuel advisory departure FAD GEN fog dispersal operations DENEB ICAO fuel on board FOB GEN fog in vicinity VCFG METAR fuel remaining FR GEN fog partial PRFG METAR fuel supply exhausted FEXHA ATC fog patches BCFG NWS fuel supply unknown FENKN ATC follow FLW GEN fuel supply until FENTL ATC following amendment authorized FAMAE GEN full performance level FPL ATC effective full route clearance FRC GEN following transmitted as received FTAR GEN full stop landing FSL ICAO (message handling) function FNCTN GEN foot FT GEN funnel cloud FC METAR for an approach to FAA ATC furnish FURN GEN for further clearance FFC ATC further particulars when available FPWA ATC for possible reclearance FPRC ATC for your information FYI GEN G forecast upper wind and temperature WINTEM ICAO for aviation forecast FCST GEN Definition Contraction Usage forecast upper wind and temperature ARMET GEN gain time control GTC ATC at specified points gallons GALS ATC forecast wind factor FRWF NWS garble GRBL GEN foreign object debris FOD GEN GBAS Landing System GLS ICAO forenoon FORNN NWS general GEN GEN form FRM GEN general aviation GA ICAO format FMT GEN General Aviation District Office GADO GEN formation FRMN GEN general notice GENOT GEN forming FRMG NWS General Safety District Office GSDO GEN forward FWD GEN general safety inspector GSI GEN forward collect FWDC GEN General Services Administration GSA GEN forward visibility (miles) FV ATC generator GNTR GEN forward visibility more than (miles) MFV ATC geographic GEO GEN freeze FRZ NWS geographical reference GEOREF GEN freezing drizzle FZDZ METAR Geoid undulation GUND ICAO freezing fog FZFG METAR get quick answer GQA GEN

2−2−12 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage H gigahertz GHZ GEN give better address GBA GEN give better reference GBR GEN Definition Contraction Usage giving GVG GEN hail (greater than 3/4”) GR METAR glaze icing GICG NWS hail showers SHGR METAR glide angle GA GEN hail showers (small) SHGS METAR glide path GP ICAO hailstones HLSTO NWS glide path angle GPA ICAO half HLF GEN glide slope GS GEN handoff point HOP ATC glider GLD ICAO handover word HOW ATC glider GLDR GEN hangar HNGR GEN global navigation satellite system GLONASS ICAO hard freeze HDFRZ NWS global navigation satellite system (in GNSS ICAO Hawaiian Air Defense Division HADD GEN general) Hawaiian Air Defense Identification HADIZ GEN Global orbiting navigation satellite GLONASS ICAO Zone system Hawaiian Air National Guard HANG GEN global positioning system GPS ICAO Hawaiian Defense Area HADA GEN Go ahead, resume sending (to be GA ICAO hazard HAZ GEN used in AFS as a procedure signal) hazard beacon HBN ICAO government GOVT GEN hazardous area reporting service HARS ATC government bill of lading GBL GEN hazardous inflight weather advisory HIWAS GEN government vehicle GVH GEN service Governor GOV GEN hazardous material HAZMAT ICAO GPS Integrity Channel GIC ATC haze HZ METAR gradient GRAD NWS Head of State status HEAD ICAO gradual GRADU ICAO heading HDG ICAO gradual GRDL NWS headquarters HQ GEN Grand Banks GRBNKS NWS headwind HDWND ATC grass landing area GRASS ICAO heater HTR GEN gravel GRVL ICAO heavy HVY ICAO Great Circle GTCL GEN heavy (to qualify weather phenom- XX ICAO Great Lakes GRTLKS NWS ena, e.g. XXRA - heavy rain) Great Lakes Region, FAA AGL GEN hectopascal HPA ICAO greater GTR GEN height HGT ICAO green G ICAO height above airport HAA GEN Greenwich Mean Time GMT GEN height above landing HAL GEN Greenwich Mean Time Z GEN height above touchdown HAT GEN grid point values of processed met- GRID ICAO helicopter HEL ICAO eorological data helicopter operations HOP GEN gross weight GWT GEN heliport HELI GEN ground GND ICAO heliport HLP ICAO ground−based augmentation system GBAS ICAO here ER ICAO ground check GNDCK ICAO here HR GEN ground communication outlet GCO ATC hertz Hz GEN ground control GC GEN heterodyne HTN GEN ground control approach GCA ICAO high HI NWS ground control intercept GCI GEN high altitude balloon HIBAL GEN ground delay program GDPGM ATC high and very high frequency HVDF ICAO ground delay program GDP ATC direction finding stations ground earth station GES ICAO high clouds visible HCVIS NWS ground fog GNDFG NWS high density traffic airport HDTA GEN ground movement chart (followed by GMC ICAO high density traffic zones HDATZ ATC name/title) high frequency HF GEN ground point of intercept GPI ATC high frequency direction finding HDF ICAO ground speed GS ATC station ground stop GS ATC high index HX NWS ground to air G/A ICAO high intensity approach light system HIALS GEN ground to air and air to ground G/A/G ICAO high intensity runway lights HIRL GEN ground visibility GV NWS high level forecast HIFOR NWS Gulf of Alaska GLFALSK NWS high voltage HV GEN Gulf of California GLFCAL NWS higher HYR ICAO Gulf of Mexico GLFMEX NWS highest temperature HITMP NWS Gulf of St. Lawrence GLFSTLAWR NWS highest temperature equaled for all HIEAT NWS gusts GSTS NWS time gusts reaching (knots) (weather re- G NWS highest temperature equaled for the HIEFM NWS ports only) month gusty GSTY NWS highest temperature equaled so early HIESE NWS

Encode 2−2−13 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage highest temperature equaled so late HIESL NWS immediately after passing IMAP ATC highest temperature exceeded for all HIXAT NWS immigration IMG ICAO time important IMPT GEN highest temperature exceeded for the HIXFM NWS impracticable IMP GEN month improve IMPR ICAO highest temperature exceeded so HIXSE NWS improve IPV GEN early impulse IMPL GEN highest temperature exceeded so late HIXSL NWS in accordance with IAW GEN highway HWY GEN in and out of clouds IAO ICAO hilltop HLTP NWS in clouds INC ICAO hold for release HFR ATC in overcast IOVC NWS holding HLDG ICAO in progress INPR ICAO holding as previously instructed HAPI ATC in RVR indicates visibility greater P METAR holding pattern HP GEN than highest reportable sensor value holiday HOL GEN (e.g. P600FT) homing beacon HB ATC in RVR indicates visibility less than M METAR horizon HRZN GEN lowest reportable sensor value (e.g. Horizontal Dilution of Precision HDOP ATC M600) hospital aircraft HOSP ICAO in temperature field means “minus” M METAR hour HR ICAO or below zero household effects HHE GEN in the vicinity of INVOF ATC how will arrival report be filed con- HIRIV ATC in valleys VAL ICAO cerning in VFR conditions IVFRC ATC however HWVR GEN inadequate INADQT GEN Hudson Valley HDSVLY NWS inbound IBND ATC humanitarian mission HUM ICAO inbound INBD ICAO hundred HND GEN inbound radial IRAD ATC hurricane HURCN ICAO inch IN ICAO hurricane report HUREP NWS include INCL GEN hydraulic HYD GEN inclusive INCLV GEN hydrographic HYDRO GEN incomplete INCOMP GEN incorporated INC GEN incorrect INCOR GEN I increase INCR GEN indefinite INDEF GEN independent sideband ISB ICAO indicate INDC GEN Definition Contraction Usage indicated air speed IAS ATC ICAO Middle East/Asia Region MID/ASIA ATC Indication of a request RQ ICAO ice crystals (weather reports only) IC METAR individual development plan IDP GEN ice on runway IR NWS individual flight plans from this point IFPFP ATC ice pellet showers SHPL METAR industrial INDUS GEN ice pellets PL METAR inertial navigation system INS ICAO icing ICG NWS information INFO ICAO icing (PIREP only) IC ATC information request INREQ GEN icing in clouds ICGIC NWS initial approach INA ICAO icing in clouds and precipitation ICGICIP NWS initial approach fix IAF ICAO icing in precipitation ICGIP NWS initial point IP ATC identification IDENT ICAO initial point/H-hour control line IP/HHCL ATC identification beacon IBN ICAO initial training INIT GEN identification friend/foe IFF ICAO inland INLD NWS identify or identifier ID ICAO inland LAN ICAO if approach missed proceed IFAMP ATC inland navigation facility INF GEN if authorized by ATC, DME may be IAATCD ATC inner marker IM ICAO used inoperative INOP ICAO if flight visibility becomes less than IFVLS ATC inspect INSP GEN if holding IFHOL ATC instability INSTBY NWS if incorrect advise IIA GEN install INSTL GEN if incorrect service direct IISD GEN instruct INSTR GEN if instrument conditions encountered IFINS ATC instructor pilot IP GEN if not off INOF GEN instrument INST GEN if not possible INP GEN instrument INSTR ICAO if unable IFUN GEN instrument approach chart (followed IAC ICAO if visibility remains IFVR ATC by name/title) IFR military training route IR GEN instrument approach procedure IAP ICAO ILS-partial ILSP GEN instrument flight rules IFR ICAO immediate IMDT NWS instrument landing system ILS ICAO immediate or immediately IMT GEN instrument low approach ILAS ATC

2−2−14 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage instrument meteorological conditions IMC GEN investigate and report INVSTAR GEN instruments authorized INSTA ATC irregular IREG GEN insufficient scheduled time available INSUF GEN island IS GEN intend INTD GEN Island Manager ISMGR GEN intense INTS NWS isolate ISOL GEN intensify INTSFY NWS issue time check ITCK ATC intensify or intensifying INTSF ICAO itinerant ITNRNT GEN intensity INTST ICAO itinerary ITRY GEN Intensity unknown (weather reports IMI ICAO only) intensity unknown (weather reports U NWS only) intentions INTNS GEN J Interagency Group on International IGIA GEN Aviation intercept INTCP GEN intercontinental INTCNTL GEN Definition Contraction Usage Interdepartmental Radio Advisory IRAC GEN Committee jet approach landing charts JAL GEN Interface Control Document ICD ATC jet assisted take-off JATO ATC Interface Revision Notices IRN ATC jet penetration JP ATC interfacility data IDAT GEN jet penetration approach JPAP ATC interference INTFC GEN jet runway barrier J-BAR ATC interim standard microwave landing ISMLS GEN jet stream JTST ICAO system jet stream JTSTR NWS interior INTR NWS jet terminal area Z ATC intermediate INTMD GEN join airways JAWYS ATC intermediate approach fix IF ICAO journeyman JOUR GEN intermediate fix IF GEN junction JCTN GEN intermittent INTER ICAO intermittent INTMT GEN intermittent instruments I/IFR ATC Inter-Mountain Region INTRMTRGN NWS K international INTL ICAO International Administrative Aero- IAARC GEN nautical Radio Conference International Aeronautical Telecom- IATSC GEN munications Switching Center Definition Contraction Usage International Air Transport IATA GEN keep this office advised KEPOA GEN Association killing frost KFRST NWS International Civil Aviation ICAO GEN kilocycles KC GEN Organization kilogram KG GEN international dateline DTLN NWS kilohertz KHZ GEN International Field Office IFO GEN kilometers KM GEN International Flight Information IFIM GEN kilometers per hour KMH ICAO Manual kilopascal KPA ICAO International Flight Service Station IFSS GEN kilowatt KW GEN international general aviation IGA ICAO knots KT GEN international standard atmosphere ISA ICAO knots indicated airspeed KIAS GEN International Telecommunications ITU GEN Union interphone IFO GEN interphone (service F) not operative IFONO GEN interphone (service F) resumed IFORO GEN L operation interrogation sign IMF GEN interrogator INTRG ICAO interrupt INTRP GEN interruption of air traffic services INATS GEN Definition Contraction Usage intersection INT ICAO Laboratory LAB GEN intersection INTXN GEN labrador LABRDR NWS intersection of air routes IAR ICAO lake LK NWS interstate INSTA GEN lake reporting service LRS GEN interval INTVL GEN laminar flow control LFC GEN intervals between aircraft in stream IBASF ATC land LND GEN type formation land lines communications facilities LICOF GEN inversion INVRN NWS landing LDG ICAO investigate INVES GEN landing LNDG GEN

Encode 2−2−15 JO 7340.2G 1/5/17

Definition Contraction Usage Definition Contraction Usage landing direction indicator LDI ICAO Local Mean Time LMT ICAO landing distance available LDA ICAO local or locally LCL GEN landing rights airport LRA GEN local standard time LST GEN landing traffic LTFC ATC local training flight LTF ATC landline LL GEN localizer LOC ICAO landline teletypewriter LTT ICAO localizer (not associated with ILS) LLZ ICAO large LRG GEN Localizer performance without LP GEN last radio contact LARCT ATC vertical guidance later LTR GEN Localizer performance with vertical LPV ICAO lateral navigation (from TERPS-A1) LNAV GEN guidance latitude LAT ICAO localizer type directional aid LDA ATC latter LTTR GEN locally LCA ICAO layer or layered or layers LYR NWS locate LCT GEN lead in lighting system LDIN GEN location (PIREP only) OV ATC leased Service A/B system LABS ATC locator L ICAO leave or leaving LVE ICAO locator middle LM ICAO leaving LV GEN logical acknowledgement LAM ICAO leaving LVG ATC logistics L GEN left L ICAO long distance LD GEN left base LB ATC long distance navigation LODISNAV GEN left side LS ATC long range LGRNG NWS left traffic pattern LP ATC long range LRG GEN length LEN ICAO long range accuracy LORAC GEN letter LTR GEN long range air navigation system LORAN GEN letter follows LETFO GEN long range VHF/UHF LRCOM GEN letter of agreement LOA GEN communications level LVL ATC long wave LGWV GEN level off LVLOF ATC longitude LONG ICAO liaison officer LO GEN longitudinal LONGL GEN lift LFT NWS loose snow on runway LSR NWS light or lighting LGT ICAO low altitude arrival/departure routing LAADR ATC light and variable LTAV GEN low altitude bombing system LABS GEN light and variable LV ICAO low approach LA ATC light intensity high LIH ICAO low drifting DR METAR light intensity low LIL ICAO low drifting dust DRDU METAR light intensity medium LIM ICAO low drifting sand DRSA METAR lighted LGTD ICAO low drifting snow DRSN METAR lightning LTNG NWS low frequency LF GEN lightning cloud-to-air LTGCA NWS low frequency intersection LFNT GEN lightning cloud-to-cloud LTGCC NWS low frequency radio range LFR GEN lightning cloud-to-cloud, cloud to LTGCCCG NWS low IFR (weather reports only) LIFR NWS ground low index LX NWS lightning cloud-to-ground LTGCG NWS low intensity runway edge lights LIRL GEN lightning cloud-to-water LTGCW NWS low level wind shear LLWS GEN lightning in clouds LTGIC NWS low level wind shear alert system LLWAS GEN like type LKTYP ATC low or medium frequency long range CONSOLAN GEN likely LKLY GEN navigational aid limit LMT GEN low or medium frequency radio RR GEN limited LTD ICAO range stations Limited Aviation Weather Reporting LAWRS GEN low/medium frequency L/MF GEN Station low visibility operations LVO GEN line LN GEN lower LWR GEN line of position LOP GEN lowest temperature LOTMP NWS line squall LSQ ICAO lowest temperature equaled for all LOEAT NWS linear polarization LP ATC time linearity LIN GEN lowest temperature equaled for the LOEFM NWS liquid propane LP GEN month little LTL GEN lowest temperature equaled so early LOESE NWS little change LTLCG NWS lowest temperature equaled so late LOESL NWS little change in temperature LCTMP NWS lowest temperature exceeded for all LOXAT NWS local airport advisory LAA GEN time local airport deicing plan LADP ATC Local Area Augmentation System LAAS ATC lowest temperature exceeded for the LOXFM NWS local control LC GEN month local coordinator LOCOR GEN lowest temperature exceeded so early LOXSE NWS lowest temperature exceeded so late LOXSL NWS

2−2−16 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

M Definition Contraction Usage mean sea level MSL ICAO mechanic MECH GEN Definition Contraction Usage mechanical reliability report MRR GEN Mach number M GEN medical MED GEN MACH Number (speed ratio to speed MACH ATC medical emergency evacuation MEDEVAC ICAO of sound) medium MED GEN medium and high frequency MHDF ICAO Mackay Radio and Telegraph MACKAY GEN direction-finding station (same Company location) magnetic MAG GEN magnetic bearing QDR ICAO medium and very high frequency dir- MVDF ICAO magnetic heading MHDG GEN ection-finding station (same location) magnetic heading QDM ICAO medium frequency MF GEN magnetic orientation of runway QFU ICAO medium frequency direction finding MDF ICAO magnetic variation VAR ICAO station main meteorological office MMO NWS medium high and very high MHVDF ICAO mainland MNLD NWS frequency direction-finding station mainly MNLY GEN (same location) maintain MNTN ICAO medium intensity approach lighting MALS GEN maintain a position VFR and advise MPVA ATC system maintain at least (altitude) MAL ATC medium intensity approach lighting MALSR GEN maintain flight level MFL ATC system with runway alignment maintain Mach MMACH ATC indicator lights maintain VFR MVFR ATC medium intensity approach lighting MALSF GEN maintain visual separation MVSP ATC system with sequenced flashers maintain well to right of course MWRC ATC medium intensity runway edge lights MIRL GEN maintaining visual flight (Special VF ATC medium range MRG GEN VFR) megahertz MHZ ICAO maintenance MAINT ICAO melting level MLTLVL NWS maintenance assumes monitor MAM GEN memorandum of agreement MOA GEN maintenance check MCK GEN memorial MEML GEN maintenance returns monitor MRM GEN merging MEGG NWS make altitude changes VFR MACVFR ATC Merit Promotion Program MPP GEN make check turn MKCT ATC message MSG ICAO make descent from MDFR ATC Message (transmission identifica- MSR ICAO make good a magnetic track of MGMT ATC tion) has been misrouted (degrees) message center MSGCTR GEN make good a track of (degrees) MGAT ATC meteorological MET GEN management MGMT GEN Meteorological Aeronautical Present- MAPS GEN manager MGR GEN ation System maneuver MNVR GEN meteorological information for VOLMET ICAO Manitoba MAN NWS aircraft in flight manual MAN GEN meteorological officer METOF GEN manual A1 simplex MAS ICAO Meteorological Operational Tele- MOTNE ICAO manual amendment MANAM GEN communications Network Europe manual of operations MANOP GEN Meteorological Watch Office MWO ICAO manufacturing inspector MI GEN meter fix time MFXT ATC map analysis MA NWS meters per second MPS ICAO marginal MRGL NWS metres (preceded by figures) M ICAO marginal VFR MVFR NWS metric units MTU ICAO Marine Corps Air Station MCAS GEN metropolitan METRO GEN Marine Corps Air Station MCAS(H) GEN Mexico MEX NWS (Helicopter) microburst MBST ICAO maritime MRTM NWS microwave landing system MLS GEN maritime (air mass) M NWS Mid-Canada Identification Zone MIDIZ GEN marked MKD GEN middle MID GEN marker MKR GEN middle marker MM ICAO marker beacon MB GEN midnight MIDN NWS marker radio beacon MKR ICAO midpoint MIDPT GEN Master Control Station MCS ATC mid-point (related to RVR) MID ICAO master flight plan on file MFPOF ATC Mike Monroney Aeronautical Center, AAC GEN material MTRL GEN FAA maximum MAX GEN mile MI GEN maximum authorized (IFR) altitude MAA GEN miles in trail MIT ATC maximum usable altitude MUA GEN miles per hour MPH GEN maximum usable frequency MUF GEN military MIL ICAO meaconing, intrusion, jamming, MIJI ATC Military Airlift Command MAC GEN interference military alert system MAS GEN

Encode 2−2−17 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage military assumes responsibility for MARSA GEN moisture MSTR NWS separation of aircraft momentary MTRY GEN military, customs, or police services STATE ICAO Monday MON ICAO military flight service MFS GEN monitor, monitored, or monitoring MNT ICAO military height finder radar MHFR GEN monitor MONTR NWS military operations area MOA ICAO monitor out of service MONOS GEN Military Radar Unit MRU GEN monitor resumed normal operation MONOK GEN military training route MTR GEN monitor station reports MOREPS GEN millibars MB GEN Monopulse secondary surveillance MSSR ICAO millimeter MM GEN radar millivolt MV GEN morning MRNG NWS mimeographic notice MIMNO GEN mostly MSTLY NWS minimum MNM ICAO mountain MT ICAO minimum altitude at glide slope MAGSI GEN mountain MTN NWS intersection inbound Mountain Standard Time (time M NWS minimum altitude over facility on MAFAP ATC groups only) final approach course mountain wave MTW ICAO minimum crossing altitude MCA ICAO move, or moving, or movement MOV ICAO minimum descent altitude MDA ICAO moving target indicator MTI ATC minimum descent height MDH ICAO multi-object phase tracking and ran- MOPTAR GEN minimum en route altitude MEA ICAO ging minimum eye height over threshold MEHT ICAO multiple MULT GEN minimum fuel on board MFOB ATC municipal MUNI GEN minimum holding altitude MHA GEN municipal airport MARPT GEN minimum interval take-off MITO ATC must ride company material RIMAT GEN minimum navigation performance MNPS ATC specification minimum navigation performance MNPSA ATC N specification airspace minimum obstacle clearance MOC ICAO (required) Definition Contraction Usage minimum obstruction clearance MOCA ICAO altitude name to NTO GEN Minimum operational performance MOPS ICAO Narrow NRW GEN standards National NATL GEN minimum reception altitude MRA GEN National NTL ICAO minimum requirements specified MIREQ GEN National Aeronautics and Space NASA GEN minimum safe altitude warning MSAW GEN Administration minimum safe/sector altitude MSA GEN National Air Traffic Controllers NATCA ATC minimum terrain clearance altitude MTCA GEN Association minimum vector altitude MVA GEN National Air Transport Coordinating NATCC GEN minimum when control zone MCZNE GEN Committee effective National Aircraft Noise Abatement NANAC GEN Ministry of Transport (Canada) MOT GEN Council minus MS NWS National Airport System Plan NASP GEN minute MIN ICAO National Airspace Data Interchange NADIN GEN minutes in trail MINIT ATC Network miscellaneous MISC GEN National Airspace Performance NAPRS ATC missed approach point MAP GEN Reporting System missed approach point MAPT ICAO National Airspace System NAS GEN missile MISL GEN National Airspace System NICS GEN missing MISG GEN Interfacility Communications System missing (weather reports only) M NWS National Airways System NASEO GEN Missing (transmission MIS ICAO Engineering office identification) National AIS system centre NASC ICAO mist BR METAR National Association of Air Traffic NAATS GEN mixed MXD NWS Control Specialists moderate MDT GEN National Aviation Facilities NAFEC GEN moderate MOD GEN Experimental Center moderate or greater MOGR NWS national beacon code allocation plan NBCAP GEN modernization MDZN GEN National Climatic Data Center NCDC GEN modernize MDZ GEN National Communications Center NATCOM GEN modernized weather teletypewriter MWTCS GEN national communications schedule NACOS GEN communications system National Communications System NCS GEN modify MDFY GEN national environmental satellite NESS GEN modulate or modulation or modulator MOD GEN service modulated continuous wave MCW ICAO National Flight Data Center NFDC GEN Mohawk Valley MHKVLY NWS National Flight Data Digest NFDD GEN

2−2−18 Encode 1/5/17 JO 7340.2G

Definition Contraction Usage Definition Contraction Usage National Guard NG GEN no pilot balloon observation will be NORPI NWS National Meteorological Center NMC GEN filed next collection unless weather National Ocean Service NOS GEN changes significantly National Oceanic and Atmospheric NOAA GEN no procedure turn required NOPT GEN Administration no radio NORDO GEN National Severe Storm Forecast NSSFC GEN no radio contact NORAC ATC Center no RAWIN obs., communications out RACO NWS National Track Analysis Program NTAP ATC no RAWIN obs., high and gusty RAWI NWS National Transportation Safety Board NTSB GEN winds National Weather Service NWS GEN no RAWIN obs., no balloons RABA NWS National Weather Service Support WSSF GEN available Facility no RAWIN obs., no gas available RAHE NWS National Weather Service Support WSSU GEN no RAWIN obs., unfavorable weath- RAWE NWS Unit er nautical mile NM ICAO no record NOREC GEN nautical mile radius NMR GEN no record of destination NRD GEN Naval Air Facility NAF GEN no reply heard NRH ICAO Naval Air Station NAS GEN no reply received NORR GEN Naval Auxiliary Air Station NAAS GEN no report NOREP GEN Naval Oceanographic Meteorological NOMAD GEN no restrictions NORST GEN Automatic Device no significant change NOSIG ICAO Naval Reserve Air Base NRAB GEN no significant cloud NSC ICAO Naval Weather Service Office NWSO GEN no significant weather NSW METAR navigation NAV ICAO no small craft or storm warning are NSCSWD NWS Navigation, ATC, and Collision NATCAS GEN being displayed Avoidance System no special observations taken (weath- NOSPL NWS navigational aid NAVAID GEN er reports only) Navy Liaison Officer NAVLO GEN no specific working hours HX ICAO Navy Representative to the FAA NAVREP GEN no traffic reported NTRP ATC NDB and DME (collocated) NDB/DME GEN no transgression zone NTZ ATC near NR GEN No transgression zone NTZ ICAO near or over large towns CIT ICAO no trouble found NTFND GEN necessary NEC GEN noise abatement test system NATS GEN negative NEG GEN nondirectional radio beacon NDB ICAO negative replies not required NONEG GEN none NIL GEN negative vorticity advection NVA NWS nonpersistent NPRS NWS neighborhood NBRHD GEN nonprecision instrument NPI GEN New Brunswick NB NWS nonrevenue NRV GEN New England NEW ENG NWS non−RVSM capable flight NONRVSM ICAO New England Region, FAA ANE GEN Nonstandard C/A Code NSC ATC Newfoundland NFLD NWS nonstandard holding pattern NSP GEN next NXT GEN nonstop NSTP GEN night NGT ICAO NORAD Region Operations Control ROCC GEN night frequency NFQ GEN Center nimbostratus NS NWS NORAD Sector Operations Control SOCC GEN No (negative) NO ICAO Center no action necessary NOAC GEN normal NML GEN no additional traffic reported NATR ATC normal operating zone NOZ GEN no arrival report NORIV ATC Normal operating zone NOZ ICAO no change NC GEN North American Aerospace Defense NORAD GEN no change in estimates NCE ATC Command no change in weather NCWX NWS North American Route NAR GEN no delay expected NDE ATC North American route program NRP ATC no essential traffic reported NETR ATC North Atlantic NAT GEN no filing time NFT GEN north or northern latitude N ICAO no further clearance required NEF ATC North Pacific NOPAC ATC no further information NOFIN GEN northbound NB ICAO no information NOIFN GEN northbound NBND GEN no layers NL NWS north-east NE ICAO no middle name NMN GEN north-eastbound NEB ICAO no parallel traffic NPRL ATC northeasterly (weather reports only) NELY NWS no pilot balloon observation due to PIWI NWS northeastern NERN NWS high, or gusty, surface wind north-north east NNE ICAO no pilot balloon observation due to PISO NWS north-north west NNW ICAO snow north-northeastern (weather reports NNERN NWS no pilot balloon observation due to PISE NWS only) unfavorable sea conditions

Encode 2−2−19 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 1 4/27/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage north-northeastward (weather reports NNEWD NWS Occlusion OCLN NWS only) occluded front OCFNT NWS north-northwestern (weather reports NNWRN NWS Occur OCR GEN only) ocean station vessel OSV NWS north-west NW ICAO oceanic air route tracking system OARTS GEN Northwest Mountain Region, FAA ANM GEN oceanic area control OAC GEN north-westbound NWB ICAO oceanic ATC OCAC GEN northwesterly (weather reports only) NWLY NWS oceanic control area OCA ICAO northwestern (weather reports only) NWRN NWS Oceanic Display and Planning ODAPS ATC north-westward (weather reports NNWWD NWS System only) oceanic navigational error report ONER ATC not above NAB GEN off watch OFW GEN not according to routine NAR GEN Office OFC GEN not applicable N/A GEN Official OFFL GEN not ARTS tracked NAT ATC Official Airline Guide OAG GEN not at present NAP GEN Offshore OFSHR NWS not authorized NA GEN omni intersection OINT GEN not available NO METAR omnidirectional approach lighting ODALS GEN not before NBFR ICAO system not for us NFU GEN on and off instruments OAOI ATC not heard NHD ATC on board OB GEN not holding NOHOL ATC on course OC ATC not in system NIS GEN on file O/F GEN not later than NLT GEN on ground OG ATC not to descend below NDBLO ATC on instruments OI ATC not to exceed NTE GEN On line data interchange OLDI ICAO NOTAM Office NOF GEN on request O/R GEN NOTAM reporting the presence or SNOWTAM ICAO on shore ONSHR NWS removal of hazardous conditions due on time OT ATC to snow, ice, slush or standing water on top OTP ATC associated with snow, slush or ice on on top and smooth OTAS NWS the movement area on watch ONW GEN NOTAM Summary NOSUM GEN one way OW GEN Notice of Proposed Rulemaking NPRM ATC Ontario ONT NWS Notice to Airmen NOTAM ICAO on-the-job training OJT GEN Notices To Airmen Publication NTAP ATC opaque, white type of ice formation OPA ICAO notification of aircraft accident ACCID ATC open OPN ICAO Notify NTFY GEN operate OPER GEN Nova Scotia NS NWS operate, operator, operational OPR ICAO now simultaneous NOSI GEN operating normally OK GEN nuclear detonation NUDET GEN operation OPN GEN Number NMBR NWS operation and regulation OANDR GEN Number NR GEN operational control OPC ICAO Numerous NMRS GEN operational information system OIS ATC operational meteorological OPMET ICAO (information) O operations OPS ICAO operations network OPSNET ATC operations normal OPNML GEN opposite direction traffic OPDT GEN Definition Contraction Usage optical landing system OLS ATC obliterate OBL GEN optimum working frequency OWF GEN obscure, obscured, or obscuring OBSC ICAO order, indication of ORD ICAO obscured sky condition X NWS organized track system OTS GEN observe, observed, or observation OBS ICAO original ORIG GEN obstacle OBST ICAO original flight plan OFP GEN obstacle assessment surface OAS ICAO Originate OGN ICAO obstacle clearance altitude OCA ICAO orographic ORGPHC NWS obstacle clearance height OCH ICAO other OTR GEN obstacle clearance limit OCL ICAO otherwise OTRW GEN obstacle clearance surface OCS ICAO our message OMSG GEN Obstacle free zone OFZ ICAO out for maintenance OFM GEN Obstruct OBST GEN out of control area OCTLA ATC Obstruction OBSTN GEN out of controlled airspace OCAS ATC obstruction chart OC GEN out of service OTS GEN Occasional OCNL GEN out of tolerance OOT GEN Occlude OCLD NWS outbound OBND ATC occluded frontal passage OFP NWS outbound OUBD ICAO

2−2−20 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage outer fix time OFXT ATC performance PER ICAO outer locator LO ICAO period PD GEN outer marker OM ICAO peripheral communications PERCOM GEN outlook OTLK NWS permanent PERM ICAO outside air temperature OAT GEN permanent change of station PCS GEN over OVR GEN permission PMSN GEN over mountains OMTNS NWS permit PMT GEN over range station ORS ATC persist PRST GEN overcast OVC NWS personal PSNAL GEN overdue OVD GEN personnel PSNL GEN overflight traffic OTFC GEN personnel and equipment working PAEW GEN overhead OHD ICAO persons on board POB ICAO overhead OVHD GEN photo reconnaissance PR GEN overhead approach OA ATC physical PHYS GEN overlay OVLA GEN Pickup PUP GEN overnight OVNGT GEN pierced steel planking PSP ICAO overrun OVRN GEN pilot balloon observation PIBAL NWS overrun lights ORL GEN pilot check PCK ATC overseas OVSEA GEN pilot controlled lighting PCL GEN overseas flight assistance service OFAS GEN Pilot controlled lighting PCL ICAO overtake OVTK GEN pilot controller glossary P/CG GEN overtime O/T GEN pilot failed to activate VFR/DVFR AVFPNO ATC oxygen OXY GEN flight plan pilot in command PIC GEN pilot instructor training PIT GEN P pilot requests forecast PIRFC GEN pilot self-briefing terminal PSBT GEN pilot to forecaster service PFSV GEN pilot weather briefing PWB GEN Definition Contraction Usage pilot weather report PIREP GEN Pacific PAC NWS pilots automatic telephone weather PATWAS GEN Pacific Standard Time PST GEN answering service Pacific Standard Time (time group P NWS place of birth PLOB GEN only) plan position indicator PPI ICAO packed snow on runway PSR NWS plan to clear PTC ATC panhandle PNHDL NWS please PLS GEN parachute PRCHT GEN plow (snow) PLW NWS parachute jumping activities PAJA GEN plus PS NWS parachute jumping exercise PJE ICAO point of no return PNR ATC paragraph PARA GEN point-to-point PTP ATC parallel PARL ICAO polar (air mass) P NWS parent FSS assumes control of PACF GEN polar track structure PTS ICAO part-time FSS portion PTN GEN parent FSS returns control of PRCF GEN position PSN ICAO part-time FSS Position adjustable range reference PARROT ATC parenthesis PAREN GEN orientation transponder parking PRKG ICAO Position Dilution of Precision PDOP ATC partial PR METAR position relief briefing observed PRBO ATC participate PTCP GEN position report PSNRP ATC partly PTLY NWS position subject to return of PSRI GEN Pass to air defense radar PADRA ATC incumbent passage PSG NWS position subject to rotating shifts PSRS GEN passenger PAX ICAO positive POS GEN passenger PSGR GEN positive control area PCA GEN passenger service PS GEN positive target control PTC ATC passing PSG NWS positive vorticity advection PVA NWS patches BC METAR possible POSS ICAO patches of shallow fog not deeper MIFG NWS possible PSBL GEN than two meters post meridiem PM GEN patchy PTCHY NWS post office PO GEN pattern PAT GEN pounds (weight) LB GEN pavement classification number PCN ICAO power PWR GEN pay period (number) PP GEN power failure PWRNO GEN Peak wind (weather reports only) PK WND NWS power restored PWROK GEN penetrate or penetration PENT ATC practice low approach PLA ICAO peninsula PEN NWS precaution PRCTN GEN percent PCT ICAO precede PRECD GEN perforator PERF GEN precipitation PCPN NWS

Encode 2−2−21 JO 7340.2G 1/5/17

Definition Contraction Usage Definition Contraction Usage precipitation identifier information PWINO NWS propose PPS GEN not available (weather reports only) proposed boundary crossing time PBCT GEN precision approach PA GEN provide PRVD GEN precision approach lighting system PALS ICAO provisional PROV ICAO precision approach path indicator PAPI ICAO proximity warning indicator PWI ATC precision approach radar PAR ICAO pseudo random noise PRN GEN Precision approach terrain chart PATC ICAO public PUB GEN precision instrument runway PIR GEN public buildings service PBS GEN Pre-departure clearance PDC ICAO publish PUBL GEN predominant PDMT NWS Puget Sound PGTSND NWS predominate PDMT NWS pulsating visual approach slope PLASI ATC preferential arrival/departure route PDAR GEN indicators (Stage A) pulsating/steady visual approach PVASI GEN preferential departure route (Stage A) PDR GEN slope indicator preferred PREF ATC purchase order PO GEN Pre-flight information bulletin PIB ICAO prepare PRP GEN present PRSNT NWS Q present address unknown PAU GEN present altitude PALT ATC present indications are PRIND GEN Definition Contraction Usage present latitude PLAT ATC present level PLVL ICAO Quadrant QUAD GEN present longitude PLONG ATC qualify QLFY GEN present position PPSN ATC quality QLTY GEN President on board civil aircraft EXEC-1 GEN quantity QNTY GEN President s family is aboard aircraft EXEC-1F GEN quarter QTR GEN pressure PRES GEN quasistationary QSTNRY NWS pressure altitude PA GEN Quebec QUE NWS pressure falling rapidly PRESFR NWS question QN GEN pressure jump (weather reports only) PRJMP NWS quota flow control procedures QFLOW GEN pressure rising rapidly PRESRR NWS prevail PVL GEN prevalent PVLT GEN R previous PREV GEN primary PRI ICAO primary PRIM GEN Definition Contraction Usage primary radar PRIRA GEN Primary surveillance radar PSR ICAO radar advisory RARAD GEN principal PRIN GEN radar approach control RAPCON GEN printer PTR GEN radar ATC facility (USN) RATCF GEN prior notice required PN ICAO radar beacon RADON GEN prior permission required PPR ICAO radar bomb scoring RBS GEN priority delayed weather PDW NWS radar bright display equipment RBDE GEN private PVT GEN radar cloud detection report RCD NWS private line telephone PLF GEN radar cloud detection report no RCDNE NWS private line teletypewriter PLT GEN echoes observed privately owned aircraft POA GEN radar cloud detection report not RCDNA NWS privately owned vehicle POV GEN available probability PRBLTY NWS radar cloud detector inoperative due RCDNO NWS probability PROB ICAO to breakdown until probability 40 percent PROB40 METAR radar cloud detector inoperative due RCDOM NWS probable PBL NWS to maintenance until probable PRBL GEN radar data (digitized) RDAT GEN procedure PROC ICAO radar departure RADEP ATC procedure signal PROSIG GEN radar dome wind RDWND NWS procedure turn PT GEN radar echo height information not RHINO NWS procedure turn PTN ICAO available procedures for air navigation services PANS ICAO radar jamming RAJAM ATC proceed PCD ICAO radar microwave link repeater RMLR GEN proceed PROCD GEN radar microwave link terminal RMLT GEN proceed directly on course PDDC ATC radar operating below prescribed ROBEPS NWS proceed or proceeding on course POC ATC standard prognosis or prognostic PROG NWS Radar position indicator RPI ICAO progress PROG GEN radar position symbol RPS ICAO prohibited area P ICAO radar range height indicator not oper- RHINO NWS propagation PROPA GEN ating on scan propeller PROP GEN radar range station RR GEN

2−2−22 Encode 1/5/17 JO 7340.2G

Definition Contraction Usage Definition Contraction Usage radar responder beacon RACON GEN reach cruising altitude RCALT ATC radar track while scan TWS ATC ready for issue RFI GEN radar vector RV ATC ready for take-off RFTO ATC radar weather report RAREP NWS reason RSN GEN radar weather report equipment PPINO NWS receipt RCPT GEN inoperative due to breakdown receive RCV GEN radar weather report equipment PPIOM NWS receive or receiver REC ICAO inoperative due to maintenance receive only R/O GEN radar weather report equipment PPIOK NWS receive, only centers R/OC GEN operation resumed Received (acknowledgement of R ICAO radar weather report no echoes PPINE NWS receipt) observed Receiver Autonomous Integrity RAIM ATC radar weather report not available (or PPINA NWS Monitoring omitted for a reason different than Receiver autonomous integrity RAIM ICAO those otherwise stated) monitoring radial RDL ICAO receiver station RS GEN radio RDO ICAO receiving capability out RCVNO GEN radio and communication facilities RACFI GEN reception fair (radio logs only) RF ATC inoperative reception good (radio logs only) RG ATC radio beacon RBN GEN reception nil (radio logs only) RN ATC radio check RCK ATC reception poor (radio logs only) RP ATC radio communication failure RCF ICAO reclearance in flight RIF ICAO radio communications link repeater RCLR GEN recleared RECLR ICAO radio communications link terminal RCLT GEN recommend RCMD GEN radio frequency RF GEN reconfiguration RCON ATC radio frequency interference RFI GEN reconnaissance RECON GEN radio range RNG ICAO record RCRD GEN radiocommunication failure RCF ICAO record observation (weather reports SA NWS radiosonde analysis and verification RAVU NWS only) unit record special observation (weather RS NWS radiosonde balloon release RABAR NWS reports only) radiosonde balloon wind data RABAL NWS redispatch RDSP GEN radiosonde observation RAOB NWS redispatch accepted RDSPA GEN radiosonde observation data RADAT NWS reduce RDC GEN radiosonde observation freezing RAFRZ NWS Reduced Vertical Separation Minim- RVSM ICAO levels um radiosonde observation icing at RAICG NWS reduction in force RIF GEN radiosonde observation not filed RAFI NWS reference REF ICAO radiosonde report already sent in RAPI GEN reference BATCS report REBAT GEN PIBAL collection reference conversation RECON GEN radiotelegraph RTG GEN reference datum height (ILS) RDH ICAO radiotelephone RTF GEN reference form REFORM GEN radioteletypewriter RTT GEN reference invoice REINV GEN radius RDS GEN reference letter RELET GEN ragged RAG ICAO reference letter from our office ROLET GEN ragged RGD NWS reference letter from your office RULET GEN rain RA METAR reference message REMES GEN rain and snow or showers of rain and RASN METAR reference message from our office ROMES GEN snow reference message from your office RUMES GEN rain showers RASH ICAO reference our memorandum ROMEMO GEN rain showers SHRA METAR reference our telephone conversation REFONE GEN rainfall RNFL NWS reference our TWX ROTWX GEN ramp check RMPCK ATC reference PBS message REPBS GEN range (lights) RG ICAO reference PBS message from our ROPBS GEN range and elevation guidance for REGAL ATC office approach and landing reference requisition from our office RORQN GEN range height indicator RHI GEN reference requisition from your RURQN GEN rapid RPD NWS office rate of climb ROC ICAO reference telegram from our office ROTEL GEN rate of descent ROD ICAO reference telegram from your office RUTEL GEN ration by schedule plus compression RBS PP ATC reference your form RUFORM GEN (RBS++) reference your memorandum RUMEMO GEN reach RCH GEN reference your TWX RUTWX GEN reach - call sign for U.S. AirForce, RCH MIL refuel RFL GEN Air Mobility Command refuse RFS GEN (USAFAMC) regard RE GEN reach cruising altitude RCA ICAO regardless of altitude RALT ATC regardless of destination airport RODA ATC

Encode 2−2−23 JO 7340.2G 1/5/17

Definition Contraction Usage Definition Contraction Usage region RGN GEN report over ROV ATC Regional AIS system centre RASC ICAO report passing RPSG ATC regional and domestic air route area RDARA GEN report proceeding on course RPOC ATC regional area forecast center RAFC ICAO report reaching RR ICAO Regional Communications Control CCC GEN report time crossing RTX ATC Center report time over RTO ATC regional office RO GEN report when established on course REOC ATC regional office notice RENOT GEN report when established well to right REWRC ATC regional OPMET bulletin exchange ROBEX ICAO of course regional supplementary procedures SUPPS ICAO reported for duty RPFOD GEN registration REG ICAO reports identification symbol RIS GEN regular RGLR GEN represent or representative REP GEN regulated output RO GEN request REQ GEN regulation REG GEN request RQ GEN Rehost Computer System RCS ATC request altitude change RAC ATC relative RLTV GEN request altitude changes en route RACE ATC relative bearing RLBG GEN request clearance RQCL ATC relative humidity RH NWS request clearance to depart VFR and RQDCZ ATC relay equipment out of operation RLANO GEN leave control zone at relay equipment resumed operation RLAOK GEN request clearance to enter control RQECZ ATC relay station RLSTN GEN zone VFR at relay to RLA ICAO request consideration REQON GEN release RLS GEN request flight plan RQP ICAO release subject your discretion SYD GEN request further airways RFA ATC reliable RELBL GEN request if desired REQID GEN relief electronic maintenance REMT GEN Request in Trail Climb RITC ATC technician Request in Trail Descent RITD ATC relieve RLV GEN request level change en route RLCE ICAO relocate RELCT GEN request level not available RLNA ICAO remain RMN GEN request no SIDs or STARs SSNO ATC remain on company frequency RCF ATC request on file RQOF ATC remain well to right of course RWRC ATC request permission RQP GEN remainder of same route RRS ATC request present altitude RPA ATC remaining overnight RON GEN request present position RQPP ATC remark RMK ICAO request reply RQRP GEN remark RMRK GEN request supplementary flight plan RQS ICAO remarks (PIREP only) RM ATC request time and altitude over RQTAO ATC Remote Airport Advisory RAA ATC request your recommendation REQRCM GEN remote air-ground facility RAGF GEN requested REQSTD GEN remote communication outlet RCO GEN require RQR GEN remote communications air/ground RCAG GEN required navigation performance RNP ICAO facility requirements RQMNTS ICAO remote receiver RRCVR GEN requisition RQN GEN remote transmitter RTMTR GEN reroute RERTE ICAO remote transmitter/receiver RTR ATC reroute RRTE ATC repair RPR GEN rescue RSCU GEN repeat RPT GEN rescue boat RB ICAO Repeat or I repeat RPT ICAO Rescue Coordination Center RCC GEN reperforator REPERF GEN rescue sub-center RSC ICAO repetitive flight plan RPL ICAO rescue vessel RV ICAO replace RPLC GEN research project REP GEN reply by airmail REPAML GEN reservation RSVN GEN reply by mail REPML GEN reserve RES GEN reply by message REPMES GEN resident RES GEN reply by TWX REPTWX GEN responder beacon RSP ICAO report RPRT GEN response RESP GEN report back on course RBOC ATC rest of route unchanged RORU ATC report back on frequency RBOF ATC restrict RESTR NWS report established in block REIB ATC restrict RSTR GEN report immediately upon leaving RL ATC restricted area (followed by R ICAO report immediately upon reaching RR ATC identification) report landing completed RLC ATC resume normal speed RNLS ATC report leaving RL ICAO resumed operation RSOPN GEN report leaving each thousand foot RLETFL ATC retained RTND GEN level retard RTRD GEN report level RLVL GEN return RTN ICAO report missing account radio failure RADNO NWS return RTRN GEN report or reporting point REP ICAO return to base RTB ATC

2−2−24 Encode 4/27/171/5/17 JO 7340.2GJO 7340.2G CHG 1

Definition Contraction Usage Definition Contraction Usage return to service RTS ICAO RVR ten minute extremes not RVRENO GEN returned account mechanical RAM GEN available returned account weather RAWX GEN RVR touchdown RVRT GEN returning to ramp RTR ATC RVR touchdown not available RVRTNO GEN reverse course RC ATC RVV not available RVVNO GEN reverse course and advise RCADV ATC revise RVS GEN rhumbline track RLTK ATC S ridge RDG NWS right (direction of turn) RITE ICAO right (runway identification) R ICAO Definition Contraction Usage right base RB ATC right side RS ATC SafeAir One-Federal Aviation FAA-1 ATC right traffic pattern RP ATC Administration Administrator right turn after take-off RT ATC SafeAir Two-Federal Aviation Ad- FAA-2 ATC Right-hand circuit RHC ICAO ministration Deputy Administrator Rio Grande RIOGD NWS saint ST GEN rising RSG NWS same direction traffic SADT GEN road reconnaissance RC GEN sand or sanded or sanding SND GEN Rockies (mountains) RCKY NWS sandstorm SS METAR rotate ROT GEN sand, sandstorm or dusting SA ICAO rotating ROTG GEN sanitary SAN ICAO rotation per minute RPM GEN Saskatchewan SASK NWS rough RUF NWS satellite STLT GEN round robin RRBN ATC satellite communication SATCOM ICAO round trip RT GEN satellite−based augmentation system SBAS ICAO route RTE GEN satisfy or satisfactory SATFY GEN route forecast ROFOR ICAO Saturday SAT ICAO routine RTNE GEN say time able SAYTA ATC routine PIREP UA ATC scattered SCT NWS Royal Australian Air Force RAAF GEN schedule SKED ICAO Royal Canadian Navy RCN GEN scheduled data base SDB GEN rules of the air and air traffic services RAC ICAO scheduled weather broadcast SWB GEN runway RWY ICAO sea level SL GEN runway RY GEN sea level pressure SLP METAR runway (used in RVR measurement) R METAR seadrome SEADRM GEN runway alignment indicator RAI ICAO seaplane base SPB GEN runway alignment indicator lights RAIL GEN search SRCH GEN runway arresting gear RAG ICAO search and rescue SAR ICAO runway center line RCL ICAO search and rescue region SRR ICAO runway center line lights RCLL ICAO second (in line) SCND GEN runway centerline light system RCLS GEN second (time) SEC GEN runway centerline marking RCLM GEN secondary SRY ICAO runway condition reading RCR GEN secondary radar SECRA GEN runway control van VAN ICAO secondary surveillance radar SSR ICAO runway edge light REDL ICAO section SXN NWS runway end identifier lights REIL GEN sector SCTR GEN runway end light RENL ICAO sector SECT ICAO Runway end safety area RESA ICAO sector field office SFO GEN runway lead-in lighting system RLLS ICAO sector field unit SFU GEN runway reference point RRP GEN sector manager SECMR GEN runway reference point downwind RRPD GEN security SCTY GEN runway reference point upwind RRPU GEN security control of air traffic SCAT GEN runway remaining lights RRL GEN security control of air traffic and air SCATANA GEN runway supervisory unit RSU GEN navigation aids runway surface condition RSCD ICAO see our message SOMSG GEN runway threshold light RTHL ICAO see your service SYS GEN runway touchdown zone light RTZL ICAO select SLCT GEN runway visibility by observer RVO GEN selective calling SELCAL ATC runway visibility value RVV GEN selective identification feature SIF ICAO runway visual range RVR ICAO self-correcting automatic navigation SCAN GEN RVR midpoint RVRM GEN semi-annual S/A GEN RVR midpoint not available RVRMNO GEN semi-automatic flight inspection SAFI GEN RVR not available RVRNO GEN semi-automatic flight inspection air- SAFI GEN RVR rollout RVRR GEN craft RVR rollout not available RVRRNO GEN semicolon SCLN GEN RVR ten minute average RVRA GEN send/receive center S/RC GEN RVR ten minute average not RVRANO GEN sensitivity SENS GEN available separation SEPN GEN

Encode 2−2−25 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage sequence SEQ GEN single SNGL GEN sequence flashing lights SFL GEN single channel simplex SCS GEN service SER ICAO single frequency approach SFA GEN service SVC GEN single isolated wheel load SIWL ICAO service available during scheduled HS ICAO single sideband SSB ICAO operations sky clear SKC METAR service available to meet operational HO ICAO sky condition (PIREP only) SK ATC requirements sleet SLT NWS serviceable SVCBL ICAO slight SLGT GEN serving SVG GEN slight chance PROB30 METAR several SVRL GEN slope SLP GEN severe SEV ICAO slow SLO GEN severe SVR GEN slow SLW ICAO severe local storms SELS NWS slush on runway SLR NWS severe weather avoidance plan SWAP GEN small SML GEN severe weather forecast WW NWS smoke FU METAR Shall I cancel telegram number ? QTA ICAO smooth SMTH NWS Or cancel telegram number snow SN ICAO Shall I run my test tape/a test QJH ICAO snow SNW NWS sentence snow and ice on runway SIR NWS shallow MI METAR snow depth increase in past hour SNOINCR NWS shallow SHLW NWS snow grains (weather reports only) SG METAR shallow fog MIFG METAR snow pellets/small hail (less than GS METAR shift (weather reports only) SHFT NWS 1/4”) short SHRT GEN snow showers SHSN METAR short approach lighting system SALS GEN snow showers SNSH ICAO short approach lighting system with SALSF GEN snowbank SNBNK NWS sequenced flashing lights snowfall SNWFL NWS short range SRG ICAO snowflake SNFLK NWS short range navigation system SHORN GEN so as to reach SATR ATC short take-off and landing STOL GEN solar-geophysical data SGD NWS shortly SHRTLY NWS solid SLD NWS shortwave SHRTWV GEN sometime SMTM GEN should SHUD ATC somewhat SMWHT GEN shower SHWR NWS souls on board SOB ATC showers SH METAR south or southern latitude S ICAO shutdown SHTDN GEN south plains SPLNS NWS Sick leave SL GEN southbound SB ICAO Side lobe suppression SLS GEN southbound SBND ATC Sierra Nevada SIERNEV NWS south-east SE ICAO SIGMET WS NWS south-eastbound SEB ICAO signal SGL GEN southeasterly (weather reports only) SELY NWS signature SIG GEN southeastern (weather reports only) SERN NWS signed SGD GEN Southern Region, FAA ASO GEN significant SGFNT GEN south-south east SSE ICAO significant meteorological SIGMET GEN south-south west SSW ICAO information south-southeastern (weather reports SSERN NWS significant weather SIGWX ICAO only) simple approach lighting system SALS ICAO south-southeastward (weather reports SSEWD NWS simplified abbreviated visual SAVASI GEN only) approach slope indicator south-southwestern (weather reports SSWRN NWS simplified directional facility SDF GEN only) simplified short approach lighting SSALS GEN south-southwestward (weather SSWWD NWS system reports only) simplified short approach lighting SSALR GEN south-west SW ICAO system with runway alignment Southwest Region, FAA ASW GEN indicator lights south-westbound SWB ICAO simplified short approach lighting SSALF GEN southwesterly (weather reports only) SWLY NWS system with sequenced flashers southwestern (weather reports only) SWRN NWS simulated approach SIM ATC space environment laboratory SEL GEN simulated flame out SFO ATC space environment service center SESC GEN simultaneous/ly SIMUL ICAO space vehicle number SVN GEN simultaneous automatic broadcast SABH GEN special SPL GEN homer special air-report ARS GEN simultaneous compass locator at SLMM GEN special air traffic rules SATR GEN middle marker special flight rules area SFRA GEN simultaneous compass locator at out- SLOM GEN special handling service for aircraft XH GEN er marker special requisition priority number SRPN GEN

2−2−26 Encode 8/17/171/5/17 JO 7340.2GJO 7340.2G CHG 2

Definition Contraction Usage Definition Contraction Usage special traffic management program STMP ATC statute mile radius SMR GEN special use airspace SUA GEN steady STDY GEN special VFR SVFR GEN stereo routes STRO GEN specification SPEC GEN stop-end (related to RVR) END ICAO spectrometric oil analysis program SOAP ATC stopway STWY GEN speed SPD GEN stopway SWY ICAO speed at pilots discretion SAPD GEN stopway light STWL ICAO speed limiting point SLP ICAO stored flight plan program SFPP ATC spiral SPRL GEN stored program for alpha numerics SPAN GEN spot wind SPOT ICAO storm STM NWS spray PY METAR straight in approach STA ICAO spread SPRD NWS straight-in approach SI GEN sprinkle SPKL NWS strategic plan of operation SPO ATC squadron SQDN GEN strategic planning team SPT ATC squall SQ METAR strategic navigation SN GEN squall line SQLN NWS stratiform STF ICAO squawk SQK ATC stratiform STFRM NWS squawk mode code SMC GEN stratocumulus SC NWS stability index SX NWS stratus ST NWS stabilized local oscillator STALO GEN stratus fractus STFRA NWS stable STBL GEN strong STG NWS stack entry time SET ATC subject terminal control release STR ATC stagnation STAGN NWS subject to SUBJ ICAO standard STD ICAO subject to correction SUBFIX GEN standard 2400 high-intensity ALSF-1 GEN submit SMT GEN approach lighting system with subside SBSD NWS sequenced flashers (Category I substitute SUB GEN configuration) sufficient SUF GEN standard 2400 high-intensity ALSF-2 GEN suggest SUG GEN approach lighting system with summary SMRY GEN sequenced flashers (Category II Sunday SUN ICAO configuration) sunrise SR ICAO standard form SF GEN sunrise to sunset HJ ICAO standard holding pattern SP GEN sunset SS ICAO standard holding procedure SHP GEN sunset to sunrise HN ICAO standard instrument approach SIA GEN super high frequency SHF GEN standard instrument approach SIAP GEN supercharge SUPCHG GEN procedure supercooled/freezing FZ METAR standard instrument arrival STAR ICAO superintendent SUPT GEN standard instrument departure SID ICAO superior SUPR GEN standard jet penetration SJP GEN supersede SUPSD GEN standard low frequency range SLRAP GEN supersonic transport SST ICAO approach supervisor SUPVR GEN standard omni range approach SORAP GEN supervisory electronics specialist SES GEN standard operating procedure SOP GEN supplement SUPPL GEN Standard Positioning Service SPS ATC supplemental weather service SWSL ATC standard range approach SR GEN location standard regional route transmitting RUT ICAO supplementary aviation weather SAWRS GEN frequencies reporting station standard terminal arrival STAR GEN supplementary flight plan SPL ICAO standards and recommended SARPS ICAO supply SUP GEN practices surface SFC ICAO standby SDBY GEN surface aviation observation SAO NWS standby STBY ICAO surface movement control SMC ICAO standby for further clearance SBFC ATC surface movement guidance and con- SMGCS GEN standing lenticular altocumulus ACSL NWS trol system standing lenticular cirrocumulus CCSL NWS surface movement radar SMR ICAO standing lenticular stratocumulus SCSL NWS surface picture SURPIC ATC start climb STCLB ATC surround SRND GEN start descent STDST ATC surveillance approach SA GEN station STN GEN surveillance radar approach SRA ICAO station administrator STADMR GEN surveillance radar element of preci- SRE ICAO station manager STMGR GEN sion approach radar system station pressure SP NWS suspend SUSP GEN stationary STNR ICAO swelling SWLG NWS stationary STNRY NWS synchronous meteorological satellite SMS GEN status STS ICAO synopsis SYNS NWS statute mile SM GEN synoptic SYNOP NWS

Encode 2−2−27 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage system SYS GEN terminal communications TCOM GEN System Command Center SCC GEN terminal control area TCA GEN system engineer SE GEN terminal control area TMA ICAO systems maintenance sector SMS GEN Terminal Data Link System TDLS GEN systems navigation SN GEN Terminal Doppler Weather Radar TDWR ATC terminal forecast TAF METAR T terminal information processing TIPS GEN system terminal instrument procedures TERPS GEN Definition Contraction Usage terminal radar TRAD GEN T visual approach slope indicator T-VASIS ICAO terminal radar approach control TRACON GEN system facility TACAN only TAO ATC terminal radar approach control in TRACAB GEN tactical air command liaison officer TACLO GEN tower cab tactical air navigation TACR GEN terminal radar service area TRSA GEN tactical air navigational aid TACAN ICAO terminal secondary radar beacon TSEC GEN tactical customer advocate TCA ATC terminal VOR TVOR ICAO tail wind TAIL ICAO terminate TRMT GEN tailwind TLWD ATC terrain TRRN GEN take-off TKOF ICAO terrain following TF GEN take-off distance available TODA ICAO Tethered Aerostat Radar System TARS GEN take-off gross weight TOG GEN tetrahedron TET GEN take-off run available TORA ICAO Text TXT ICAO tandum TAND GEN The last message received by me was LR ICAO taxi or taxiing TAX ICAO . taxiing TXG ATC The last message sent by me was or LS ICAO taxiing guidance system TGS ICAO last message was taxilane TXL ICAO thereafter THRFTR GEN taxiway TWY ICAO thick THK NWS taxiway link TWYL ICAO thin THN NWS team supervisor TS GEN This is a channel-continuity-check of CH ICAO Technical Center, FAA ACT GEN transmission to permit comparison of technical reason TECR ICAO your record of channel-sequence technical standard order TSO GEN numbers of messages received on the teleautograph TELAU GEN channel telecommunications TEL GEN This is a duplicate message (to be DUPE ICAO telegraph reply TELRY GEN used in AFS as a procedure signal) Telemetry TLM ATC thousand THSD GEN telephone FONE GEN threaten THTN GEN telephone TEL ICAO threshold THLD GEN telephone company TELCO GEN threshold THR ICAO telephone conference TELCON GEN threshold crossing height TCH ICAO telephone exchange TELEX GEN threshold crossing height downwind TCHD GEN teletype switching facilities TTS GEN threshold crossing height upwind TCHU GEN teletypewriter TT GEN through THRU ICAO teletypewriter communications out of TYPNO GEN throughout THRUT GEN service thunder THDR NWS teletypewriter communications TYPOK GEN thunderhead THD NWS returned to service thunderstorm TS METAR teletypewriter exchange service TWX GEN thunderstorm TSTM NWS teletypewriter station TTY GEN thunderstorm information not TSNO METAR temperature T ICAO available temperature TEMP GEN thunderstorm with duststorm or sand- TSSA METAR temperature (PIREP only) TA ATC storm temporary TEMPO ICAO thunderstorm with hail TSGR METAR temporary TMPRY GEN thunderstorm with ice pellets TSPL METAR temporary appointment pending TAPER GEN thunderstorm with rain TSRA METAR establishment of a register thunderstorm with small hail TSGS METAR temporary duty TDY GEN thunderstorm with snow TSSN METAR temporary flight restriction TFR GEN Thursday THU ICAO temporary reserved airspace TRA ICAO time (PIREP only) TM ATC tendency TNDCY GEN time and altitude over TAO ATC tentative TNTV GEN time and attendance report TANDA GEN terminal TRML GEN time check TC ATC terminal area chart TAC GEN time delay TDEL GEN terminal area surveillance radar TAR ICAO Time Dilution of Precision TDOP ATC terminal area surveillance radar TASR GEN time of delivery TOD GEN terminal automated radar services TARS GEN time of receipt TOR GEN

2−2−28 Encode 8/17/171/5/17 JO 7340.2GJO 7340.2G CHG 2

Definition Contraction Usage Transport Two-Deputy Secretary of DOT-2 ATC Transportation time of transmission TOT GEN to be continued TOC GEN transportation request T/R GEN today TDA GEN Transportation Security TSA GEN tolerance TLRNC GEN Administration tomorrow TMW GEN trapping layer TRPLYR NWS tonight TNGT GEN travel TVL GEN too long to print TLTP GEN travel arrangements without TAWOG GEN top of climb TOC ICAO government expense top of overcast TOVC NWS travel order TO GEN topping TPG NWS treated TRTD GEN tornado TDO ICAO trend TEND ICAO tornado/water spout +FC METAR tributary TRIB NWS total aboard TA GEN tri-color visual approach slope TRCV GEN touch and go landing TGL ICAO indicator touchdown TD ATC tropical TRPCL NWS touchdown zone TDZ ICAO tropical (air mass) T NWS touchdown zone elevation TDZE ATC tropical continental (air mass) TRPCD NWS touchdown zone light (system) TDZL GEN tropical cyclone TC ICAO toward TWD GEN tropopause TROP NWS tower TWR GEN trouble TRBL GEN tower en route control TEC ATC trough TROF NWS tower en route control area TECA ATC true (bearing) T GEN towering TWRG NWS true air speed TAS GEN towering cumulus TCU NWS true bearing QTE ICAO trace (weather reports only) T NWS Tuesday TUE ICAO track TR ICAO turbojet TBJT GEN track TRK GEN turbulence TURB ICAO traffic TFC ICAO turbulence TURBC NWS traffic alert and collision avoidance TCAS GEN turbulence (PIREP only) TB ATC system turbulent TURBT NWS Traffic Flow Management Convec- TCF ATC turn altitude TNA ICAO tive Forecast Product turn around TARND ATC traffic flow management system TFMS ATC turn height TNH ICAO Traffic information broadcast by TIBA ICAO turn left after take-off LT ATC aircraft Turning point TP ICAO traffic management TM ATC Twilight TWI GEN traffic management program alert TMPA ATC type aircraft TYP ICAO traffic on request TOR ATC type aircraft (PIREP only) TP ATC traffic pattern altitude TPA ATC Typhoon TYPH ICAO traffic received TFRCD ATC traffic zone TFZ GEN training T GEN U training TRG ICAO training TRNG GEN Trans-Atlantic TSATLC GEN trans-continental TCNTL GEN Definition Contraction Usage transcribed weather broadcast TWEB GEN transfer TSFR GEN U.S. Air Force USAF GEN transfer of control point TCP ATC U.S. Army USA GEN transient TRAN ATC U.S. Army Aviation Flight USAFIB GEN transient TSNT GEN Information transition TRSN GEN U.S. Coast Guard USCG GEN transition altitude TA ICAO U.S. Marine Corps USMC GEN transition level TRLVL ICAO U.S. Navy USN GEN transmit TMT GEN ultra high frequency UHF ICAO transmit or transmitter TRANS ICAO ultra high frequency direction finding UDF ICAO transmitter distributor TD GEN station transmitter station TS GEN Unable UN GEN transmitting capability out of service TSMNO GEN Unable UNA ICAO transmitting capability returned to TSMOK GEN unable higher altitude UHA ATC service unable higher due opposite direction UHDODT ATC Trans-Pacific TSPAC GEN traffic transponder PARROT GEN unable higher due same direction UHDSDT ATC transponder inoperative TINOP ATC traffic transport TRNSP GEN unable higher due traffic UHDT ICAO Transport One-Secretary of DOT-1 ATC unable higher due traffic UHDT ICAO Transportation unable lower due traffic ULDT ATC

Encode 2−2−29 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Definition Contraction Usage Definition Contraction Usage unable to approve UNAP ICAO upstream UPSTRM NWS unable to approve UNAPV GEN upward vertical velocity UVV NWS unable to approve altitude requested UNAR ATC upwind UW ATC unable to approve arrival for the time UA ATC urgent URG GEN specified urgent PIREP UUA ATC unable to approve departure for the UD ATC urgent special observation (weather USP NWS time specified reports only) unable to approve route requested UNRR ATC usable USBL GEN unable to contact company radio UNCC ATC User Equivalent Range Error UERE ATC unable to establish contact UNTC ATC unable to finish INSUF GEN unable to maintain UM ATC V unable to monitor UNMON GEN unable to transmit NIL GEN Definition Contraction Usage unattended UNATNDD GEN unavailable UNAVBL GEN V/STOL approach system VAPS GEN uncertainty phase code (alerting INCERFA ATC Valley VLY NWS service) Vancouver Island, BC VRISL NWS undelivered UNDLD GEN Variable VRB ICAO unheard UNHRD GEN variable VRBL GEN unidentified UNID GEN variable (weather reports only) V NWS unidentified flying object UFO GEN variation VARN GEN United States Naval Observatory USNO ATC vector VCTR ATC United States NOTAM Office USNOF GEN veer VR NWS United States NOTAM System USNS GEN velocity VLCTY NWS unknown UNKN GEN verify VFY GEN unknown precipitation UP METAR vertical VER ICAO unlighted UNLGTD GEN Vertical Dilution of Precision VDOP ATC unlimited UNL ICAO vertical motion VRT MOTN NWS unmanned aircraft system UAS ICAO vertical navigation (from TERPS− VNAV GEN unmonitored UNMON ATC A1) unnecessary UNEC GEN vertical speed VSP ICAO unofficial UNOFFL GEN vertical take-off and landing VTOL ICAO unquote UQOT GEN vertical visibility (indefinite ceiling) VV METAR unreadable UNRDBL GEN vertical/short take-off and landing VSTOL GEN unreliable UNREL ICAO very high frequency VHF ICAO unreliable UNRELBL GEN very high frequency direction- VDF ICAO unrestricted UNRSTD GEN finding station unsatisfactory UNSATFY GEN very important person VIP ICAO unscheduled UNSKED GEN very long range VLR ICAO unseasonable UNSBL NWS very low frequency VLF GEN unserviceable U/S ICAO vessel VSL GEN unsettle UNSTL NWS VFR arrival delay advisory VADA ATC unstable UNSTBL NWS VFR conditions on top VCOT ATC unsteady UNSTDY NWS VFR low altitude training routes TR GEN until TIL GEN VFR military training routes VR GEN until advised by UAB ATC VFR restrictions still apply VFRSA ATC until advised by the tower UAT ATC VHF omni-directional radio range VOR ICAO until cleared down UCDWN ATC via flight planned route VFPR ATC until cleared to land by the tower UCLT ATC via low frequency direct VLFD ATC until further advised UFA GEN via omni direct VOD ATC until further notice UFN GEN Vice President is aboard civil aircraft EXEC-2 GEN until past TIP ATC Vice President s family is aboard EXEC-2F GEN untra long range ULR ICAO aircraft unusable UNUSBL GEN vicinity VC METAR/ up and down drafts UDDF NWS TAF up drafts UPDFTS NWS vicinity VC METAR update UPDT NWS vicinity VCNTY GEN upper UPR NWS vicinity VCY ICAO upper air route UAR ICAO victor airways VA ATC upper area control center UAC ICAO violent VLNT NWS upper atmosphere geophysics UAG NWS Virginia Capes VACAPES ATC upper control area UTA ICAO visibility VIS ICAO upper flight information region UIR ICAO visibility VSBY NWS upper information center UIC ICAO visibility decreasing rapidly VSBYDR NWS upper winds UWNDS NWS visibility greater than 6 SM (TAF P6SM METAR upper winds obs. (by radio methods) RAWIN NWS only) upslope UPSLP NWS visibility increasing rapidly VSBYIR NWS

2−2−30 Encode 8/17/171/5/17 JO 7340.2GJO 7340.2G CHG 2

Definition Contraction Usage Definition Contraction Usage visible VSB GEN weather system processor WSP GEN visual approach chart VAC ICAO (replacement for LLWAS) Visual approach chart (followed by VAC ICAO Wednesday WED ICAO name/title) weekday WKDAY GEN visual approach slope indicator VASI GEN weekend WKEND GEN visual approach slope indicator VASIS ICAO weight WT GEN system well to right WTR ATC visual descent point VDP GEN well to right of course WRC ATC visual flight VFLT GEN west or western longitude W ICAO visual flight rules VFR ICAO westbound WB ICAO visual glide path indicator VSPI GEN westbound WBND ATC visual integrated presentation VIP GEN western plateau WPLTO NWS visual meteorological conditions VMC ICAO Western Union Telegraph Company WU GEN visual reference gate VRG GEN Western-Pacific Region, FAA AWP GEN visual-aural radio range VAR ICAO west-north west WNW ICAO voice modulation VM GEN west-northwestern (weather reports WNWRN NWS voice operated relay VOPR GEN only) volcanic ash VA METAR west-northwestward (weather reports WNWWD NWS volcanic ash advisory ASHTAM ICAO only) volume VOL GEN west-south west WSW ICAO VOR and DME (collocated) VOR/DME GEN west-southwestern (weather reports WSWRN NWS VOR and TACAN (collocated) VORTAC ICAO only) VOR airborne equipment test facility VOT ICAO west-southwestward (weather reports WSWWD NWS VOR test signal VOT GEN only) vorticity VOT GEN wet runway WR NWS voucher VOU GEN wet snow on runway WSR NWS What is my distance to your station QGE ICAO W or Tour distance to my station is whereabouts WBTS GEN while in control area WICA ATC Definition Contraction Usage while in control zone WICZ ATC Warm WRM NWS white W ICAO warm (air mass) W NWS Wide Area Augmentation System WAAS ICAO warm front WRMFNT NWS widely WDLY NWS warm front passage WFP NWS widespread WDSPR GEN Warning WRNG NWS widespread WDSPRD NWS wasatch range WSTCH NWS widespread dust DU METAR Washington Office WO GEN width or wide WID ICAO watch check list completed WCLC GEN will WL GEN Water WTR NWS will accept, if offered, the position WAIOP GEN Waterspout WTSPT NWS will advise WLAV GEN Wave WV NWS will be issued WIBIS GEN Waypoint WP GEN will be reported by NOTAM WBRBN GEN Waypoint WPT ICAO will comply WILCO GEN waypoint report WPRT ATC will you accept, if offered, the WYAIO GEN We agree or it is correct OK ICAO position of weak WK GEN Will you give me the position of my QTF ICAO weak signals WS ATC station according to the bearings weaken WKN GEN taken by the D/F station which you weather WEA NWS control or the position of your station weather WX ICAO according to the bearings taken by weather at altitude (PIREP only) WX ATC the D/F stations that I control was Weather Bureau Regional Headquar- WBRH GEN latitude longitude (or other indica- ters tion of position), class ....at....hours Weather Forecast Office WFO GEN Will you indicate the TRUE track to QUJ ICAO Weather Message Switching Center WMSC GEN reach you or the TRUE track to reach weather radar analysis and RADU GEN me is degrees at hours development unit Will you relay to free of charge or I QSP ICAO Weather Reconnaissance Area WRA GEN will relay to free of charge weather reconnaissance flight pilot WXCON NWS wind WND NWS report wind at altitude (PIREP only) WV ATC weather report will not be filed for FINO NWS wind direction indicator WDI ICAO transmission wind shear WS ICAO Weather Service Contract Meteorolo- WSCMO GEN wind shift WSHFT NWS gical Observatory wing bar lights WBAR ICAO Weather Service Office WSO GEN winter WINT NWS weather service operations manual WSOM NWS with effect from, or effective from WEF ICAO

Encode 2−2−31 JO7110.65RJO 7340.2G7340.2G CHG CHG 2 2 8/17/173/15/071/5/17

Definition Contraction Usage Y with immediate effect or effective WIE ICAO immediately within WI ICAO Definition Contraction Usage without WO GEN words per minute WPM GEN Yards YD ICAO work in progress WIP ICAO yellow caution zone (runway YCZ ICAO working group WG GEN lighting) World aeronautical chart - ICAO 1:1 WAC ICAO Yellowstone YLSTN NWS 000 000(followed by name/title) Yes (affirmative) YES ICAO world area forecast center WAFC ICAO yesterday YDA GEN World Data Centers in Western WDC-1 NWS you are authorized URAUZ GEN Europe your YR ICAO World Data Centers throughout rest WDC-2 NWS your message YMSG GEN of world your message date YMSGD GEN World Geodetic System WGS ATC your recommendation is requested URIZR GEN World geodetic system 1984 WGS-84 ICAO Yukon YKN NWS World Meteorological Organization WMO GEN Yukon Standard Time (time groups Y NWS World wide web WWW ICAO only) worse WRS GEN Z

X Definition Contraction Usage Z marker (VHF station location ZM GEN marker) zonal index ZI NWS Definition Contraction Usage zone of interior ZI NWS

2−2−32 Encode