§ 80.271 47 CFR Ch. I (10–1–97 Edition)
§ 80.271 Technical requirements for note in the Commission’s Radio Equip- portable survival craft radio- ment List. telephone transceivers. (a) Portable survival craft radio- § 80.273 Technical requirements for telephone transceivers must comply radar equipment. with the following: The technical requirements for radar (1) The transceivers must receive and equipment are contained in § 80.825. transmit either on 457.525 MHz or on 156.800 MHz; Subpart G—Safety Watch (2) The receiver must comply with Requirements and Procedures the requirements in part 15, subpart C of this chapter and must have a sen- COAST STATION SAFETY WATCHES sitivity of not more than 2 microvolts. The sensitivity requirement must be § 80.301 Watch requirements. met using the receiver sensitivity (a) Each public coast station operat- measurement procedure specified in ing on telegraphy frequencies in the the Radio Technical Commission for Marine Services (RTCM) Special Com- band 405–535 kHz must maintain a mittee No. 66 Report MMS–R2; watch for classes A1A, A2B and H2B (3) The effective radiated power of emissions by a licensed radiotelegraph the transmitter must be at least 0.1 operator on the frequency 500 kHz for watt; three minutes twice each hour, begin- (4) The transceivers must be battery ning at x h.15 and x h.45 Coordinated powered and operate for at least four Universal Time (UTC). hours with a transmit to receive ratio (b) Each public coast station licensed of 1:9 with no significant adverse effect to operate in the band 1605–3500 kHz upon the performance of the device; must monitor such frequency(s) as are (5) The transceivers must have a per- used for working or, at the licensee’s manently attached waterproof label discretion, maintain a watch on 2182 with the statement ‘‘Complies with the kHz. FCC requirements for survival craft (c) Except for distress, urgency or two-way radiotelephone equipment’’; safety messages, coast stations must and not transmit on 2182 kHz during the si- (6) The antenna must be permanently lence periods for three minutes twice attached to the device or its removal each hour beginning at x h.00 and x h.30 must require the use of a special tool. Coordinated Universal Time (UTC). (b) Portable radiotelephone (d) Each public coast station must transceivers that are already type ac- provide assistance for distress commu- cepted may be used to satisfy the sur- nications when requested by the Coast vival craft radiotelephone requirement Guard. until October 1, 1993, provided the de- vice meets the technical requirements § 80.302 Notice of discontinuance, re- in paragraphs (a) (1) through (3) of this duction, or impairment of service section. involving a distress watch. (c) Survival craft radiotelephone (a) When changes occur in the oper- equipment installed after October 1, ation of a public coast station which 1988, must be type accepted to meet the include discontinuance, reduction or requirements of this section. suspension of a watch required to be (d) After October 1, 1993, all portable maintained on 500 kHz, 2182 kHz, or radiotelephone transceivers that are used to satisfy the survival craft radio- 156.800 MHz, notification must be made telephone requirement must have been by the licensee to the nearest district type accepted to meet the require- office of the U.S. Coast Guard as soon ments of this section. as practicable. The notification must (e) Portable radiotelephone include the estimated or known re- transceivers which are type accepted to sumption time of the watch. meet the requirements of this section (b) [Reserved] must be identified by an appropriate
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§ 80.303 Watch on 156.800 MHz (Chan- h.00 and x h.30 Coordinated Universal nel 16). Time (UTC) using either a loudspeaker (a) During its hours of operation, or headphone. Expect for distress, ur- each coast station operating in the 156– gency or safety messages, ship stations 162 MHz band and serving rivers, bays must not transmit during the silence and inland lakes except the Great periods on 2182 kHz. Lakes, must maintain a safety watch on the frequency 156.800 MHz except § 80.305 Watch requirements of the when transmitting on 156.800 MHz. Communications Act and the Safety (b) A coast station may be exempted Convention. from compliance with the watch re- (a) Each ship of the United States quirement when Federal, State or which is equipped with a radio- Local Government stations maintain a telegraph station for compliance with watch on 156.800 MHz over 95% of the part II of title III of the Communica- coast station’s service area. Requests tions Act or chapter IV of the Safety for an exemption must include a chart Convention must: showing the receiving service area of (1) Keep a continuous and efficient the inland water public coast station. watch on 500 kHz by means of radio of- The coordinates, to the nearest ficers while being navigated in the minute, and the receiving service area open sea outside a harbor or port. In of the Government stations maintain- lieu thereof, on a cargo ship equipped ing the continuous watch on 156.800 with a radiotelegraph auto alarm in MHz must be indicated on the same proper operating condition, an efficient chart. The service area of these sta- watch on 500 kHz must be maintained tions must be calculated using criteria by means of a radio officer for at least specified in subpart P of this part. 8 hours per day in the aggregate, i.e., (c) If the government station(s) pro- for at least one-third of each day or viding the 156.800 MHz watch over the portion of each day that the vessel is service area of an exempt station tem- navigated in the open sea outside of a porarily discontinues that watch, the harbor or port. exempt coast station upon receiving notice of this condition must maintain (2) Keep a continuous and efficient the watch on 156.800 HMz during the watch on the radiotelephone distress discontinuance. Automated maritime frequency 2182 kHz from the principal communications systems’ compliance radio operating position or the room with this requirement is limited to the from which the vessel is normally use of existing facilities. steered while being navigated in the open sea outside a harbor or port. A ra- [51 FR 31213, Sept. 2, 1986, as amended at 52 diotelephone distress frequency watch FR 35245, Sept. 18, 1987] receiver having a loudspeaker and a ra- SHIP STATION SAFETY WATCHES diotelephone auto alarm facility must be used to keep the continuous watch § 80.304 Watch requirement during si- on 2182 kHz if such watch is kept from lence periods. the room from which the vessel is nor- (a) Each ship station operating on te- mally steered. After a determination legraphy frequencies in the band 405– by the master that conditions are such 535 kHz, must maintain a watch on the that maintenance of the listening frequency 500 kHz of three minutes watch would interfere with the safe twice each hour beginning at x h.15 and navigation of the ship, the watch may x h.45 Coordinated Universal Time be maintained by the use of the radio- (UTC) by a licensed radiotelegraph offi- telephone auto alarm facility alone. cer using either a loudspeaker or head- (3) Keep a continuous and efficient phone. watch on the VHF distress frequency (b) Each ship station operating on te- 156.800 MHz from the room from which lephony on frequencies in the band the vessel is normally steered while in 1605–3500 kHz must maintain a watch the open sea outside a harbor or port. on the frequency 2182 kHz. This watch The watch must be maintained by a must be maintained at least twice each designated member of the crew who hour for 3 minutes commencing at x may perform other duties, relating to
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the operation or navigation of the ves- and participating in a Vessel Traffic sel, provided such other duties do not Services (VTS) system when a watch is interfere with the effectiveness of the maintained on both the bridge-to- watch. Use of a properly adjusted bridge frequency and a VTS frequency. squelch or brief interruptions due to (c) Each vessel of the United States other nearby VHF transmissions are transporting more than six passengers not considered to adversely affect the for hire, which is equipped with a ra- continuity or efficiency of the required diotelephone station for compliance watch on the VHF distress frequency. with part III of title III of the Commu- This watch need not be maintained by nications Act must, while being navi- vessels subject to the Bridge-to-Bridge gated in the open sea or any tidewater Act and participating in a Vessel Traf- within the jurisdiction of the United fic Services (VTS) system as required States adjacent or contiguous to the or recommended by the U.S. Coast open sea, keep a continuous watch on Guard, when an efficient listening 2182 kHz while the vessel is beyond watch is maintained on both the VHF communication range of the near- bridge-to-bridge frequency and a sepa- est VHF coast station, whenever the rate assigned VTS frequency. radiotelephone station is not being (b) Each cargo ship of the United used for authorized traffic. A VHF States which is equipped with a radio- watch must be kept on 156.800 MHz telephone station for compliance with whenever such station is not being part II of title III of the Communica- used for authorized traffic. The VHF tions Act or chapter IV of the Safety watch must be maintained at the ves- Convention must while being navigated sel’s steering station actually in use by outside of a harbor or port: the qualified operator as defined by (1) Keep a continuous watch on 2182 § 80.157 or by a crewmember who may kHz in the room from which the vessel perform other duties relating to the op- is normally steered while at sea, when- eration or navigation of the vessel, pro- ever such station is not being used for vided such other duties do not interfere authorized traffic. Such watch must be with the watch. The use of a properly maintained by at least one officer or adjusted squelch is not considered to crewmember who may perform other adversely affect the watch. The VHF duties relating to the operation or watch need not be maintained by ves- navigation of the vessel, provided such sels subject to the Bridge-to-Bridge Act other duties do not interfere with the and participating in a Vessel Traffic watch. A radiotelephone watch receiver Services (VTS) system when an effi- having a loudspeaker and a radio- cient listening watch is maintained on telephone auto alarm must be used to both the bridge-to-bridge frequency keep the continuous watch on 2182 kHz. and a VTS frequency. After a determination by the master that maintenance of the watch would § 80.306 Provisions governing the ra- interfere with the safe navigation of diotelegraph watch. the ship, the watch may be maintained (a) The radio officer must use the by use of the radiotelephone auto main or reserve receiver, and either alarm facility alone. headphones or a loudspeaker to keep (2) Keep a continuous watch on the watch on 500 kHz. 156.800 MHz from the room from which (b) During the watch, the radio offi- the vessel is normally steered. The cer may temporarily interrupt the re- watch must be maintained by a crew- quired watch on 500 kHz while trans- member who may perform other duties, mitting or receiving signals or mes- relating to the operation or navigation sages to or from a station but only if it of the vessel, provided such other du- is not feasible to simultaneously han- ties do not interfere with the watch. dle such traffic and listen on 500 kHz Use of properly adjusted squelch of by split headphones or a loudspeaker. brief interruptions due to other nearby The watch on 500 kHz must, however, VHF transmissions are not considered without exception be maintained dur- to adversely affect the watch. This ing the silence periods. watch need not be maintained by ves- (c) During this watch, on vessels sub- sels subject to the Bridge-to-Bridge Act ject to the Communications Act and
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the Safety Convention on international sel maintaining a watch on the bridge- voyages, the radio officer may dis- to-bridge frequency 156.650 MHz and continue listening when handling traf- participating in a Vessel Traffic Serv- fic on other frequencies or performing ices (VTS) system and maintaining a other essential radio duties, but only if watch on the specified VTS frequency. it is impracticable to listen by split (2) 156.650 MHz on board a vessel 38 headphones or loudspeaker. The watch meters (124 feet) and over in length, a must always be maintained by a radio vessel engaged in towing (See officer using headphones or loud- § 80.951(b)), or a vessel carrying more speaker during the silence periods. The than six passengers for hire. This term ‘‘essential radio duties’’ in this watch must be maintained continu- rule includes urgent repairs of radio- ously and effectively. Sequential mon- communication equipment used for itoring is not sufficient. Portable VHF safety or radio navigational equipment equipment may be used to meet this re- by order of the master. quirement. Vessels are exempted from (d) When authorized by the master, this requirement while transiting the the radio officer may perform mainte- St. Lawrence Seaway and complying nance repair of communications, navi- with the Joint Regulations of the St. gation or other electronic equipment Lawrence Seaway Authority and St. outside of the radiotelegraph room, Lawrence Seaway Development Cor- provided that the listening watch on poration between the lower exit of St. 500 kHz can be maintained by head- Lambert Lock at Montreal and Cross- phones, loudspeakers, portable receiv- over Island, New York and in the Wel- ers, or other suitable means. The watch land Canal and approaches between on 500 kHz must be maintained in the Calling in Point No. 15 and No. 16. radiotelegraph room during the silence (b) The watch must be maintained by period. the master, or person designated by the § 80.307 Compulsory use of radio- master, who may perform other duties telegraph auto alarm. provided they do not interfere with the effectiveness of the watch. The radiotelegraph auto alarm re- quired on a cargo ship subject to the [53 FR 17052, May 13, 1988] radiotelegraph provisions of part II of title III of the Communications Act or § 80.309 Watch required by the Bridge- the Safety Convention must be in oper- to-Bridge Act. ation, connected to the main antenna In addition to the watch requirement and adjusted for optimum efficiency at contained in § 80.148, all vessels subject all times while the ship is being navi- to the Bridge-to-Bridge Act must keep gated in the open sea when a radio offi- a watch on the designated navigational cer is not listening on the frequency frequency. The watch must be main- 500 kHz, except under the cir- tained by the master or person in cumstances as set forth in § 80.306(b). charge of the vessel or the person des- ignated by the master or person in § 80.308 Watch required by the Great Lakes Radio Agreement. charge to pilot or direct the movement of the vessel. The person standing (a) Each ship of the United States watch may perform other duties pro- that is equipped with a radiotelephone vided such other duties do not interfere station for compliance with the Great with the watch. Lakes Radio Agreement must when un- derway keep a watch on: [51 FR 31213, Sept. 2, 1986, as amended at 57 (1) 156.800 MHz on board a vessel 20 FR 61012, Dec. 23, 1992] meters (65 feet) and over in length, a vessel engaged in towing (See § 80.310 Watch required by voluntary § 80.951(b)), or a vessel carrying more vessels. than 6 passengers for hire. This watch Voluntary vessels not equipped with must be maintained whenever the sta- DSC must maintain a watch on 156.800 tion is not being used for authorized MHz (channel 16) whenever the radio is traffic. However, a watch on 156.800 operating and is not being used to com- MHz need not be maintained by a ves- municate. Noncommercial vessels,
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such as recreational boats, may alter- Frequency band Emission Carrier frequency natively maintain a watch on 156.450 156±162 MHz ...... F3E, PON 156.800 MHz 156.750 MHz (channel 9) for call and reply pur- MHz. poses. 243 MHz ...... A3N ...... 243.000 MHz. [57 FR 19552, May 7, 1992] The maximum transmitter power ob- DISTRESS, ALARM, URGENCY AND tainable may be used. SAFETY PROCEDURES [51 FR 31213, Sept. 2, 1986; 51 FR 34984, Oct. 1, 1986] § 80.311 Authority for distress trans- mission. § 80.314 Distress signals. A mobile station in distress may use (a) The international radiotelegraphy any means at its disposal to attract at- distress signal consists of the group tention, make known its position, and ‘‘three dots, three dashes, three dots’’ obtain help. A distress call and mes- (... ---...), symbolized herein by SOS, sage, however, must be transmitted transmitted as a single signal in which only on the authority of the master or the dashes are slightly prolonged so as person responsible for the mobile sta- to be distinguished clearly from the tion. No person shall knowingly trans- dots. mit, or cause to be transmitted, any (b) The international radiotelephone false or fraudulent signal of distress or distress signal consists of the word related communication. MAYDAY, pronounced as the French expression ‘‘m’aider’’. § 80.312 Priority of distress trans- (c) These distress signals indicate missions. that a mobile station is threatened by The distress call has absolute prior- grave and imminent danger and re- ity over all other transmissions. All quests immediate assistance. stations which hear it must imme- diately cease any transmission capable § 80.315 Distress calls. of interfering with the distress traffic (a) The radiotelegraph distress call and must continue to listen on the fre- consists of: quency used for the emission of the dis- (1) The distress signal SOS, sent tress call. This call must not be ad- three times; dressed to a particular station. Ac- (2) The word DE; knowledgement of receipt must not be (3) The call sign of the mobile station given before the distress message in distress, sent three times. which follows it is sent. (b) The radiotelephone distress call consists of: § 80.313 Frequencies for use in dis- (1) The distress signal MAYDAY spo- tress. ken three times; The frequencies specified in the (2) The words THIS IS; bands below are for use by mobile sta- (3) The call sign (or name, if no call tions in distress. The conventional sign assigned) of the mobile station in emission is shown. When a ship station distress, spoken three times. cannot transmit on the designated fre- § 80.316 Distress messages. quency or the conventional emission, it may use any available frequency or (a) The radiotelegraph distress mes- emission. Frequencies for distress and sage consists of: safety calling using digital selective (1) The distress signal SOS; calling techniques are listed in (2) The name of the mobile station in § 80.359(b). Distress and safety NB-DP distress; frequencies are indicated by footnote 2 (3) Particulars of its position; in § 80.361(b). (4) The nature of the distress; (5) The kind of assistance desired; Frequency band Emission Carrier frequency (6) Any other information which might facilitate rescue. 405±535 kHz ...... A2B ...... 500 kHz. (b) The radiotelephone distress mes- 1605±3500 kHz ...... J3E ...... 2182 kHz. 4000±27, 5000 kHz .... A2B ...... 8364 kHz. sage consists of: 118±136 MHz ...... A3E ...... 121.500 MHz. (1) The distress signal MAYDAY;
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(2) The name of the mobile station in § 80.318 Use of alarm signals. distress; (a) The radiotelegraph or radio- (3) Particulars of its position; telephone alarm signal, as appropriate, (4) The nature of the distress; must only be used to announce: (5) The kind of assistance desired; (1) That a distress call or message is (6) Any other information which about to follow; might facilitate rescue, for example, (2) The transmission of an urgent cy- the length, color, and type of vessel, clone warning. In this case the alarm number of persons on board. signal may only be used by coast sta- (c) As a general rule, a ship must sig- tions authorized by the Commission to nal its position in latitude and lon- do so; or gitude, using figures for the degrees (3) The loss of a person or persons and minutes, together with one of the overboard. In this case the alarm sig- words NORTH or SOUTH and one of the nal may only be used when the assist- words EAST or WEST. In radio- ance of other ships is required and can- telegraphy, the signal .-.-.- must be not be satisfactorily obtained by the used to separate the degrees from the use of the urgency signal only, but the minutes. When practicable, the true alarm signal must not be repeated by bearing and distance in nautical miles other stations. The message must be preceded by the urgency signal. from a known geographical position (b) In cases described in paragraphs may be given. (a)(2) and (3) of this section, the trans- § 80.317 Radiotelegraph and radio- mission of the warning or message by telephone alarm signals. radiotelegraphy must not begin until two minutes after the end of the radio- (a) The international radiotelegraph telegraph alarm signal. alarm signal consists of a series of twelve dashes sent in one minute, the § 80.319 Radiotelegraph distress call duration of each dash being four sec- and message transmission proce- onds and the duration of the interval dure. between consecutive dashes one second. (a) The radiotelegraph distress proce- The purpose of this special signal is the dure consists of the following six steps: actuation of automatic devices giving however, when time is vital, the first the alarm to attract the attention of and second steps may be omitted. the operator when there is no listening These two steps of the distress proce- watch on the distress frequency. dure may also be omitted in cir- (b) The international radiotelephone cumstances when transmission of the alarm signal consists of two substan- alarm signal is considered unnecessary: tially sinusoidal audio frequency tones (1) The radiotelegraph alarm signal; transmitted alternately. One tone (2) The distress call and an interval of two minutes; must have a frequency of 2200 Hertz (3) The distress call; and the other a frequency of 1300 Hertz, (4) The distress message; the duration of each tone being 250 mil- (5) Two dashes of ten to fifteen sec- liseconds. When generated by auto- onds each; matic means, the radiotelephone alarm (6) The call sign of the mobile station signal must be transmitted continu- in distress. ously for a period of at least 30 seconds, (b) The radiotelegraph distress trans- but not exceeding one minute; when missions must be sent by means of the generated by other means, the signal international Morse code at a speed not must be transmitted as continuously exceeding 16 words per minute nor less as practicable over a period of approxi- than 8 words per minute. mately one minute. The purpose of this (c) The distress message, preceded by special signal is to attract the atten- the distress call, must be repeated at tion of the person on watch or to actu- intervals, especially during the 500 kHz ate automatic devices giving the international silence periods, until an alarm. answer is received. The radiotelegraph
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alarm signal may also be repeated, if communication with one or more coast necessary. stations is practicable, ship stations (d) The transmissions under para- may defer this acknowledgement for a graphs (a) (5) and (6) of this section, short interval so that a coast station which are to permit direction finding may acknowledge receipt. stations to determine the position of (b) Stations of the maritime mobile the station in distress, may be repeated service which receive a distress mes- at frequent intervals if necessary. sage from a mobile station which be- (e) When the mobile station in dis- yond any possible doubt is not in their tress receives no answer to a distress vicinity, must allow a short interval of message transmitted on the distress time to elapse before acknowledging frequency, the message may be re- receipt of the message in order to per- peated on any other available fre- mit stations nearer to the mobile sta- quency on which attention might be tion in distress to acknowledge receipt attracted. without interference.
§ 80.320 Radiotelephone distress call § 80.322 Form of acknowledgement. and message transmission proce- (a) The acknowledgement of receipt dure. of a radiotelegraph distress message is (a) The radiotelephone distress proce- transmitted in the following form: dure consists of: (1) The distress signal SOS; (1) The radiotelephone alarm signal (2) The call sign of the station send- (whenever possible); ing the distress message, sent three (2) The distress call; times; (3) The distress message. (3) The word DE; (b) Radiotelephone distress trans- (4) The call sign of the station ac- missions must be made slowly and dis- knowledging receipt, sent three times; tinctly, each word being clearly pro- (5) The group RRR; nounced to facilitate transcription. (6) The message signal SOS. (c) After the transmission by (b) The acknowledgement of receipt radiotelephony of its distress message, of a radiotelephone distress message is the mobile station may be requested to transmitted in the following form: transmit suitable signals followed by (1) The distress signal MAYDAY; its call sign or name, to permit direc- (2) The call sign or other identifica- tion-finding stations to determine its tion of the station sending the distress position. This request may be repeated message, spoken three times; at frequent intervals if necessary. (3) The words THIS IS; (d) The distress message, preceded by (4) The call sign or other identifica- the distress call, must be repeated at tion of the station acknowledging re- intervals until an answer is received. ceipt, spoken three times; This repetition must be preceded by (5) The word RECEIVED; the radiotelephone alarm signal when- (6) The distress signal MAYDAY. ever possible. (e) When the mobile station in dis- § 80.323 Information furnished by an tress receives no answer to a distress acknowledging station. message transmitted on the distress (a) Every mobile station which ac- frequency, the message may be re- knowledges receipt of a distress mes- peated on any other available fre- sage must on the order of the master or quency on which attention might be person responsible for the ship, air- attracted. craft, or other vehicle carrying such mobile station, transmit as soon as § 80.321 Acknowledgement of receipt possible the following information in of distress message. the order shown: (a) Stations of the maritime mobile (1) Its identifier; service which receive a distress mes- (2) Its position; sage from a mobile station which is be- (3) The speed at which it is proceed- yond any possible doubt in their vicin- ing towards, and the approximate time ity must immediately acknowledge re- it will take to reach the mobile station ceipt. However, in areas where reliable in distress.
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(b) Before sending this message, the sistance required by the mobile station station must ensure that it will not in distress. In distress traffic, the dis- interfere with the emissions of other tress signal must be sent before the stations better situated to render im- call and at the beginning of the pre- mediate assistance to the station in amble of any radiotelegram. distress. (b) The control of distress traffic is the responsibility of the mobile station § 80.324 Transmission of distress mes- in distress or of the station which has sage by station not itself in distress. sent the distress message. These sta- (a) A mobile station or a land station tions may delegate the control of the which learns that a mobile station is in distress traffic to another station. distress must transmit a distress mes- (c) The station in distress or the sta- sage in any of the following cases: tion in control of distress traffic may (1) When the station in distress can- impose silence either on all stations of not transmit the distress message. the mobile service in the area or on (2) When the master or person re- any station which interferes with the sponsible for the ship, aircraft, or other distress traffic. It must address these vehicle not in distress, or for the land instructions ‘‘to all stations’’ or to one station, believes that further help is station only, according to cir- necessary. cumstances. In either case, it must use (3) When, although not in a position one of the following signals which are to assist, it has heard a distress mes- reserved for use by the mobile station sage which has not been acknowledged. in distress and for the station control- When a mobile station transmits such ling distress traffic: a distress message, it must notify the (1) In radiotelegraphy, the abbrevia- authorities who may be able to assist. tion QRT, followed by the distress sig- (b) Transmission must be made on nal SOS. the international distress frequencies (2) In radiotelephony, the signal or on any other available frequency on SEELONCE MAYDAY. which attention might be attracted. (d) If essential, any station of the (c) Transmission of the distress mes- mobile service near the ship, aircraft, sage must always be preceded by the or other vehicle in distress may also call indicated below, which must itself impose silence. It must use for this be preceded whenever possible by the purpose: radiotelegraph or radiotelephone alarm (1) In radiotelegraphy, the abbrevia- signal. This call consists of: tion QRT, followed by the word DIS- (1) When radiotelegraphy is used: TRESS and its own call sign; (i) The signal DDD SOS SOS SOS (2) In radiotelephony, the word DDD: SEELONCE, followed by the word DIS- (ii) The word DE; TRESS and its own call sign or other (iii) The call sign of the transmitting identification. station, sent three times. (2) When radiotelephony is used: § 80.326 Notification of resumption of (i) The signal MAYDAY RELAY, spo- normal working. ken three times; (a) When distress traffic has ceased, (ii) The words THIS IS; or when complete silence is no longer (iii) The call sign or other identifica- necessary on a frequency which has tion of the transmitting station, spo- been used for distress traffic, the sta- ken three times. tion which has controlled this traffic (d) When the radiotelegraph alarm must transmit on that frequency a signal is used, an interval of two min- message addressed ‘‘to all stations’’ in- utes must be allowed, whenever this is dicating that normal working may be considered necessary, before the trans- resumed. mission of the call mentioned in para- (1) In radiotelegraphy, this message graph (c)(1) of this section. consists of: (i) The distress signal SOS; § 80.325 Control of distress traffic. (ii) The call ‘‘to all stations’’ (CQ), (a) Distress traffic consists of all sent three times; messages relating to the immediate as- (iii) The word DE;
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(iv) The call sign of the station send- § 80.328 Urgency message. ing the message; (v) The time of handing in the mes- (a) The urgency signal and call, and sage; the message following it, must be sent (vi) The name and call sign of the on one of the international distress fre- mobile station which was in distress; quencies. Stations which cannot trans- (vii) The service abbreviation QUM. mit on a distress frequency may use (2) In radiotelephony, this message any other available frequency on which consists of: attention might be attracted. (i) The distress signal MAYDAY; (b) Mobile stations which hear the (ii) The call ‘‘Hello all stations’’, spo- urgency signal must continue to listen ken three times; for at least three minutes. At the end (iii) The words THIS IS; of this period, if no urgency message (iv) The call sign or other identifica- has been heard, they may resume their tion of the station sending the mes- normal service. However, land and mo- sage; bile stations which are in communica- (v) The time of handing in of the tion on frequencies other than those message; used for the transmission of the ur- (vi) The name and call sign of the gency signal and of the call which fol- mobile station which was in distress; (vii) The words SEELONCE FEENEE lows it may continue their normal OR PRU-DONCE. work without interruption provided (b) Until they receive the foregoing the urgency message is not addressed message indicating that normal or lim- ‘‘to all stations’’. ited working may be resumed, all sta- (c) When the urgency signal has been tions which are aware of the distress sent before transmitting a message ‘‘to traffic, and which are not taking part all stations’’ which calls for action by in it, are forbidden to transmit on the the stations receiving the message, the frequencies on which the distress traf- station responsible for its transmission fic is taking place. must cancel it as soon as it knows that action is no longer necessary. This § 80.327 Urgency signals. message of cancellation must likewise (a) The urgency signal indicates that be addressed ‘‘to all stations’’. the calling station has a very urgent message to transmit concerning the § 80.329 Safety signals. safety of a ship, aircraft, or other vehi- (a) The safety signal indicates that cle, or the safety of a person. The ur- the station is about to transmit a mes- gency signal must be sent only on the sage concerning the safety of naviga- authority of the master or person re- tion or giving important meteorologi- sponsible for the mobile station. cal warnings. (b) In radiotelegraphy, the urgency signal consists of three repetitions of (b) In radiotelegraphy, the safety sig- the group XXX, sent with the individ- nal consists of three repetitions of the ual letters of each group, and the suc- group TTT, sent with the individual cessive groups clearly separated from letters of each group, and the succes- each other. It must be transmitted be- sive groups clearly separated from each fore the call. other. It must be sent before the call. (c) In radiotelephony, the urgency (c) In radiotelephony, the safety sig- signal consists of three oral repetitions nal consists of the word SECURITE, of the group of words PAN PAN trans- pronounced as in French, spoken three mitted before the call. times and transmitted before the call. (d) The urgency signal has priority (d) The safety signal and call must be over all other communications except sent on one of the international dis- distress. All mobile and land stations tress frequencies (500 kHz or 8364 kHz which hear it must not interfere with radiotelegraph; 2182 kHz or 156.8 MHz the transmission of the message which radiotelephone). Stations which cannot follows the urgency signal. transmit on a distress frequency may [51 FR 31213, Sept. 2, 1986, as amended at 52 use any other available frequency on FR 35245, Sept. 18, 1987] which attention might be attracted.
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§ 80.330 Safety message. (2) Failure of the vessel being called to respond to a second call at low (a) The safety signal and call must be power. followed by the safety message. Where practicable, the safety message should (3) A broadcast call as in paragraph be sent on a working frequency, and a (a)(1) of this section in a blind situa- suitable announcement to this effect tion, e.g., rounding a bend in a river. must be made at the end of the call. § 80.332 Equipment to aid search and (b) Except for the cases mentioned in rescue operations. paragraph (c) of this section, the safety signal when sent on the frequency 500 (a) Survival craft stations may trans- kHz must be transmitted toward the mit distress, urgency and safety sig- end of the first available silence period; nals, calls and messages. the safety message must be transmit- (b) EPIRB’s may transmit only in ac- ted immediately after the silence pe- cordance with the requirements of sub- riod. parts V and X of this part. (c) Messages about meteorological warnings, of cyclones, dangerous ice, § 80.333 Stations in the maritime mo- dangerous wrecks, or any other immi- bile-satellite service. nent danger to marine navigation must The provisions of §§ 80.311 and 80.324 be preceded by the safety signal. apply to the operations of ship earth (d) Stations hearing the safety signal stations in the maritime mobile-sat- must not make any transmission likely ellite service. to interfere with the message. Subpart H—Frequencies § 80.331 Bridge-to-bridge communica- tion procedure. RADIOTELEGRAPHY (a) Vessels subject to the Bridge-to- Bridge Act transmitting on the des- § 80.351 Scope. ignated navigational frequency must The following sections describe the conduct communications in a format carrier frequencies and general uses of similar to those given below: radiotelegraphy with respect to the fol- (1) This is the (name of vessel). My lowing: position is (give readily identifiable po- sition, course and speed) about to (de- —Distress, urgency, safety, call and reply. scribe contemplated action). Out. —Working. (2) Vessel off (give a readily identifi- —Digital selective calling (DSC). able position). This is (name of vessel) —Narrow-band direct-printing (NB–DP). off (give a readily identifiable posi- —Facsimile. tion). I plan to (give proposed course of action). Over. § 80.353 General uses—radio- telegraphy. (3) (Coast station), this is (vessel’s name) off (give readily identifiable po- (a) Unless otherwise indicated radio- sition). I plan to (give proposed course telegraphy may be used by ship and of action). Over. public coast stations only. (b) Vessels acknowledging receipt (b) The signal code for Morse teleg- must answer ‘‘(Name of vessel calling). raphy must be the international Morse This is (Name of vessel answering). Re- code signals specified in the Telegraph ceived your call,’’ and follow with an Regulations annexed to the Inter- indication of their intentions. Commu- national Telecommunication Conven- nications must terminate when each tion. ship is satisfied that the other no (c) To facilitate communications, longer poses a threat to its safety and ship stations transmitting by means of is ended with ‘‘Out’’. radiotelegraphy must use the service (c) Use of power greater than 1 watt abbreviations (‘‘Q’’ signals) listed in in a bridge-to-bridge station shall be Appendix 14 to the ITU Radio Regula- limited to the following three situa- tions whenever practicable. tions: (d) In order to reduce interference (1) Emergency. stations must attempt to select calling
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