Review of ANP/FASID Procedures

IAVWOPSG/4-WP/3 International Civil Aviation Organization 30/7/08

WORKING PAPER

INTERNATIONAL AIRWAYS VOLCANO WATCH OPERATIONS GROUP (IAVWOPSG)

FOURTH MEETING

Paris, France, 15 to 19 September 2008

Agenda Item 4: Review of ICAO provisions related to IAVW 4.1: Review of ANP/FASID procedures

REVIEW OF ANP/FASID PROCEDURES

(Presented by the Secretary)

SUMMARY This paper reviews the current ICAO IAVW-related provisions and proposes updates thereto, as necessary.

1. REVIEW OF ANP/FASID PROCEDURES

1.1 The group will recall that it is tasked to review the IAVW-related procedures contained in the ANP/FASID at every meeting. The group is invited to review these procedures and propose any additional amendments, as necessary. In this regard the group may wish to formulate the following conclusion:

Conclusion 4/... — Amendment to the IAVW-related regional procedures in the ANP/FASID

That the Secretariat forward the IAVW-related regional procedures as shown in Appendix1 to this report to the ICAO Regional Offices for processing and onward transmission to States for comments, as necessary in view of their early inclusion in the ANP/FASID.

1 The procedures are at Appendix A to this paper.

(24 pages) 0e31a047dca07f341e921105776699e9.doc 2 IAVWOPSG/4-WP/3

2. REVIEW OF GUIDANCE MATERIAL

2.1 The group may wish to recall that with its assistance and as a follow-up of IAVWOPSG Conclusion 3/3, the Manual on Volcanic Ash, Radioactive Material and Toxic Chemical Clouds (Doc 9691) and the Handbook on the International Airways Volcano Watch (IAVW) — Operational Procedures and Contact List (Doc 9766) were reviewed and aligned with Amendment 74 to Annex 3 by the Secretariat. The said amendment included, inter alia, the elimination of the “outlook” in SIGMET for volcanic ash, a reference to the volcano observatory notice for aviation (VONA), the new format for the volcanic activity reporting (VAR) format, a reference to Selected State Volcano Observatories and the introduction of an example of notification from IAEA regarding the release of radioactive material in the atmosphere. The English version of the amendment to the manual was issued in December 2007 and the respective language versions will be incorporated in the respective second edition of the manual currently under preparation.

2.2 As a follow-up of various IAVWOPSG/3 conclusions, the amendment to the handbook included the following developments:

a) a reference to the specific EUR requirements for transmission to the EUR Region of volcanic ash advisories and SIGMET information for volcanic ash, issued outside the EUR Region, as specified in the EUR FASID Table MET 2B (IAVWOPSG Conclusion 3/5 refers)

b) guidance regarding the reporting of volcanic ash to appropriate VAACs and WMOs by the airline operation centres and flight crews (IAVWOPSG Conclusion 3/8 refers)

c) inclusion of the template for the provision of information from the volcano observatories to ACCs, MWOs and VAACs (IAVWOPSG Conclusion 3/9 refers)

2.3 Finally the group may wish to note that as a follow-up of IAVWOPSG Conclusion 3/4, the ICAO Secretary General approved the publication of the Handbook on the International Airways Volcano Watch (IAVW) — Operational Procedures and Contact List (Doc 9766) as an online publication only.

2.4 The group is invited to review Doc 9766 and propose additional changes as necessary. It should be noted that additional amendments to Doc 9766 are being proposed under IAVWOPSG-WPs/9, 15, 17, 20, 21, 23, 26, 27, 29, 32, 35 and 38. Part of the referred proposals, once endorsed by the group, will be processed in the time frame between IAVWOPSG meetings and part of them have to be presented at the IAVWOPSG/5 meeting for consideration by the group.

3. REVIEW OF DRAFT AMENDMENT 75 TO ANNEX 3

3.1 The group will recall that, in view of the three-year amendment cycle of Annex 3, it is expected to review IAVW-related amendments thereto at every second IAVWOPSG meeting. The Secretariat has prepared a draft amendment to Annex 3 and Annex 15 based on the progress made by the group (Appendices B and C to this working paper refer). The proposed amendment relates to the following areas: 3 IAVWOPSG/4-WP/3

d) the use of the PNG chart form in addition to the BUFR code form for graphical volcanic ash advisories [IAVWOPSG Conclusion 3/12];

e) the reporting of light and variable winds, direction of movement and the addition of terms for “not available” or “not produced” forecast in Table A2-1 Template for advisory message for volcanic ash [IAVWOPSG Conclusion 3/15];

f) the reporting of volcanic ash deposition at aerodromes as one of the conditions prompting the issuance of an aerodrome warning and a NOTAM respectively [IAVWOPSG Conclusion 3/26]; and

g) the focal point for the notification to ACCs regarding the release of the radioactive material [IAVWOPSG Conclusion 3/28].

3.2 The group will note that items a) and b) will be addressed under Agenda Item 5.2, c) under Agenda Item 6.4 and d) under Agenda Item 7.1 respectively and that any changes stemming from the discussions under these agenda items would have to be reflected in the final version of the draft amendment.

3.3 The group is invited to review the draft amendment in Appendix B and formulate the following conclusion:

RSPP Conclusion 4/... — Amendment to Annex 3

That, the proposal to amend Annex 3 — Meteorological Service for International Air Navigation given in Appendix2.... to this report be included as part of Amendment 75 to Annex 3.

RSPP Conclusion 4/... — Amendment to Annex 15

That, the proposal to amend Annex 15 — Aeronautical Information Services given in Appendix3.... to this report be included as part of Amendment 36 to Annex 15.

4. ACTION BY THE IAVWOPSG

4.1 The IAVWOPSG is invited to:

a) note the information in this paper: and

h) decide on the draft conclusions proposed for the group’s consideration.

2 The draft amendment is at Appendix B to this working paper.

3 The draft amendment is at Appendix C to this working paper. 4 IAVWOPSG/4-WP/3

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IAVWOPSG/4-WP/3 Appendix A

APPENDIX A

ANP/FASID PROVISIONS RELATED TO IAVW

BASIC ANP

SIGMET and AIRMET information (FASID Tables MET 3A, MET 3B and MET 3C) . . .

19. Tropical cyclone advisory centres (TCACs) [Darwin, Honolulu, Miami, Nadi, New Delhi, Réunion and Tokyo] have been designated to prepare advisory information. FASID Table MET 3A sets out the area of responsibility, the period(s) of operation of the TCAC(s) and the MWOs to which the advisory information should be sent. [IAVWOPSG Conclusion 3/2]

20. Volcanic ash advisory centres (VAACs) [Anchorage, Buenos Aires, Darwin, London, Montreal, Tokyo, Toulouse, Washington and Wellington] have been designated to prepare advisory information. FASID Table MET 3B sets out the area of responsibility of the VAACs, the MWOs and ACCs to which the advisory information should be sent. [IAVWOPSG Conclusion 3/2]

21. In order for the VAACs to initiate the monitoring of volcanic ash from satellite data and the forecast of volcanic ash trajectories, MWOs should notify the relevant VAAC immediately on receipt of information that a volcanic eruption has occurred or volcanic ash has been observed in the FIR for which they are responsible. In particular, any special air-reports of pre-eruption volcanic activity, a volcanic eruption or volcanic ash cloud, received by MWOs should be transmitted without delay to the VAAC concerned. Selected State volcano observatories have been designated for direct notification of significant pre-eruption volcanic activity, a volcanic eruption and/or volcanic ash in the atmosphere to their corresponding ACC, MWO and VAAC. FASID Table MET 3C sets out the selected State volcano observatories and the VAACs, MWOs and ACCs to which the notification should be sent by the observatories. [IAVWOPSG Conclusion 2/2]

. . . IAVWOPSG/4-WP/3 Appendix A A-2

TROPICAL CYCLONE AND VOLCANIC ASH ADVISORY CENTRES (FASID Tables MET 3A and , MET 3B and MET 3C and FASID Charts MET 2 and MET 3)

. . . 1

6. The areas of responsibility and the periods of operation of the tropical cyclone advisory centres (TCACs) [Darwin, Honolulu, Miami, Nadi, New Delhi, Réunion and Tokyo], and the MWOs to which advisory information should be sent by the TCACs, are contained in FASID Table MET 3A. The areas of responsibility of the designated TCACs in all regions are shown on FASID Chart MET 2.

7. The areas of responsibility of the volcanic ash advisory centres (VAAC) [Anchorage, Buenos Aires, Darwin, London, Montreal, Tokyo, Toulouse, Washington and Wellington], the MWOs and ACCs to which the advisory information should be sent by the VAACs are contained in FASID Table MET 3B. The areas of responsibility of the designated VAACs in all regions are shown on FASID Chart MET 3.

8. FASID Table MET 3C sets out the selected State volcano observatories designated for direct notification of significant pre-eruption volcanic activity, a volcanic eruption and/or volcanic ash in the atmosphere and the VAACs, MWOs and ACCs to which the notification should be sent by the observatories.

Note. — Operational procedures to be used for the dissemination of information on volcanic eruptions and associated ash clouds in areas which could affect routes used by international flights and necessary pre-eruption arrangements as well as the list of operational contact points are provided in the document entitled Handbook on the International Airways Volcano Watch (IAVW) — Operational Procedures and Contact List (Doc 9766). Additional guidance material regarding the IAVW is contained in the Manual on Volcanic Ash, Radioactive Material and Toxic Chemical Clouds (Doc 9691).

. . . 2 IAVWOPSG/4-WP/3 A-3 Appendix A

Table MET 3A

TROPICAL CYCLONE ADVISORY CENTRES

EXPLANATION OF THE TABLE

Column

1 Location of the tropical cyclone advisory centre (TCAC).

2 Area of responsibility for the preparation of advisory information on tropical cyclones by the TCAC in column 1.

3 Period of operation of the TCAC.

4 MWO to which the advisory information on tropical cyclones should be sent.

Note.— ICAO location indicators for MWOs are shown in Table MET 1B. IAVWOPSG/4-WP/3 Appendix A A-4

Tropical cyclone MWO to which advisory Area of responsibility Period of operation advisory centre information is to be sent

1 2 3 4 IAVWOPSG/4-WP/3 A-5 Appendix A

1 FASID TABLE MET 3B — VOLCANIC ASH ADVISORY CENTRES

Column

1. Name of the volcanic ash advisory centre (VAAC)

2. ICAO location indicator of VAAC (for use in the WMO heading of advisory bulletin).

3. Area of responsibility for the preparation of advisory information on volcanic ash by the VAAC in Column 1. 4. ICAO region where the VAAC, MWOs and ACCs are located. 5. ICAO Contracting State where the MWOs and ACCs/FICs are located 6. MWOs to which the advisory information on volcanic ash should be sent. 7. ICAO location indicator of the MWOs in Column 6. 8. ACCs to which the advisory information on volcanic ash should be sent. 9. ICAO location indicator of the ACCs in Column 8. Note:― MWOs and ACCs in italics are situated outside the (AFI, ASIA/PAC, CAR/SAM, EUR/NAT, MID and NAM)Region IAVWOPSG/4-WP/3 Appendix A A-6

MWO ACC/FIC VAAC Area of ICAO region State to which the information is to which information is responsibility to be sent to be sent ICAO Name ICAO Name ICAO Name Loc Ind Loc Ind Loc Ind

1 2 3 4 5 6 7 8 9

IAVWOPSG/4-WP/3 A-7 Appendix A

FASID Table MET 3C

SELECTED STATE VOLCANO OBSERVATORIES

Column

1. Name of the Provider State of the volcano observatory designated for direct notification of volcanic activity.

2. Name of the volcano observatory.

3. VAAC to which the information related to pre-eruption volcanic activity, a volcanic eruption and/or volcanic ash cloud should be sent.

4. ACC to which the information related to pre-eruption volcanic activity, a volcanic eruption and/or volcanic ash cloud should be sent.

5. ICAO location indicator of the ACC listed in Column 4.

6. MWO to which the information related to pre-eruption volcanic activity, a volcanic eruption and/or volcanic ash cloud should be sent.

7. ICAO location indicator of the MWO listed in Column 6. IAVWOPSG/4-WP/3 Appendix A A-8

Provider State of Volcano observatory VAAC to which the ACC to which the MWO to which volcano observatory information is to information is to be information is to be be sent sent sent Name ICAO Name ICAO Loc Ind Loc Ind 1 2 3 4 5 6 7 IAVWOPSG/4-WP/3 A-9 Appendix A

MAP OF AREAS OF RESPONSIBILITY OF VAAC AND CORRESPONDING FIR

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IAVWOPSG/4-WP/3 Appendix B

APPENDIX B

NOTES ON THE PRESENTATION OF THE PROPOSED AMENDMENT TO ANNEX 3

The text of the proposed amendment is arranged to show deleted text with a line through it and new text highlighted with grey shading as shown below:

1. text to be deleted is shown with a line through it text to be deleted

2. new text to be inserted is highlighted with grey new text to be inserted shading

3. text to be deleted is shown with a line through it new text to replace existing text followed by the new text which is highlighted with grey shading IAVWOPSG/4-WP/3 Appendix B B-2

PROPOSED AMENDMENT TO INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES

METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION

ANNEX 3 TO THE CONVENTION OF INTERNATIONAL CIVIL AVIATION

SIXTEENTH EDITION — JULY 2007

PART I. CORE SARPs

. . . 3

CHAPTER 3. WORLD AREA FORECAST SYSTEM AND METEOROLOGICAL OFFICES

. . . 4

3.4 Meteorological watch offices

. . . 5

3.4.2 A meteorological watch office shall:

a) maintain watch over meteorological conditions affecting flight operations within its area of responsibility;

. . . 6

g) supply information received concerning the accidental release of radioactive materials into the atmosphere, in the area for which it maintains watch or adjacent areas, to its associated ACC/FIC, as agreed between the meteorological and ATS authorities concerned, and to aeronautical information service units, as agreed between the meteorological and appropriate civil aviation authorities concerned. The information shall comprise location, date and time of the accident, and forecast trajectories of the radioactive materials.

Note.— The information is provided, at the request of the delegated authority in a State, by WMO regional specialized meteorological centres (RSMC) for the provision of transport model products for radiological environmental emergency response. The information is sent by the RSMC to a single contact point of the national meteorological service in each State. This contact point has the responsibility of redistributing the RSMC products within the State concerned. Furthermore, the information is provided IAVWOPSG/4-WP/3 B-3 Appendix B by IAEA to VAAC London (designated as the focal point) which in turn notifies the ACCs concerned about the release.

. . . 7

PART II. APPENDICES AND ATTACHMENTS

. . . 8

APPENDIX 2. TECHNICAL SPECIFICATIONS RELATED TO WORLD AREA FORECAST SYSTEM AND METEOROLOGICAL OFFICES (See Chapter 3 of this Annex.)

. . . 9

3.1 Volcanic ash advisory information

. . . 10

3.1.2 Recommendation.— The volcanic ash advisory information listed in Table A2-1, when issued in graphical format, should be as specified in Appendix 1 using the portable network graphics (PNG) format. When issued in binary format, the BUFR code form should be used.

Note.— The BUFR code form is contained in WMO Publication No. 306, Manual on Codes, Volume I.2, Part B — Binary Codes. IAVWOPSG/4-WP/3 Appendix B B-4

Table A2-1. Template for advisory message for volcanic ash

Key: M = inclusion mandatory, part of every message; O = inclusion optional; = = a double line indicates that the text following it should be placed on the subsequent line.

Note 1.— The ranges and resolutions for the numerical elements included in advisory messages for volcanic ash are shown in Appendix 6, Table A6-4.

Note 2.— The explanations for the abbreviations can be found in the Procedures for Air Navigation Services — ICAO Abbreviations and Codes (PANS-ABC, Doc 8400).

Note 3.— Inclusion of a “colon” after each element heading is mandatory.

Note 4.— The numbers 1 to 18 are included only for clarity and they are not part of the advisory message, as shown in the example.

Element Detailed content Template(s) Examples . . . 11 13 Observed or Horizontal (in OBS VA CLD or TOP FLnnn or SFC/FLnnn or OBS VA CLD: FL150/350 estimated ash degrees and EST VA CLD: FLnnn/nnn N4230 E14048 – cloud (M) minutes) and [nnKM WID LINE2 BTN (nnNM WID N4300 E14130 – vertical extent at LINE BTN)] N4246 E14230 – the time of Nnn[nn] or Snn[nn] Wnnn[nn] or N4232 E14150 – observation of the Ennn[nn] – N4230 E14048 observed or Nnn[nn] or Snn[nn] Wnnn[nn] or estimated ash cloud Ennn[nn][ – SFC/FL150 MOV or, if the base is Nnn[nn] or Snn[nn] Wnnn[nn] or NE 25KT unknown, the top of Ennn[nn] – FL150/350 MOV E the observed or Nnn[nn] or Snn[nn] Wnnn[nn] or 30KT estimated ash cloud; Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or TOP FL240 MOV W movement of the Ennn[nn]]3 40KMH observed or or estimated ash cloud TOP FLnnn or SFC/FLnnn or FLnnn/nnn MOV N nnKMH (or KT) or MOV NE nnKMH (or KT) or MOV E nnKMH (or KT) or MOV SE nnKMH (or KT) or MOV S nnKMH (or KT) or MOV SW nnKMH (or KT) or MOV W nnKMH (or KT) or MOV NW nnKMH (or KT)4

VA NOT IDENTIFIABLE FROM SATELLITE DATA WINDS FLnnn/nnn nnn/nn[n] KMH (KT)4 or VRB nnKMH (kt) or VRB BTN SFC or FLnnn/nnn nnKMH (kt) IAVWOPSG/4-WP/3 B-5 Appendix B

Element Detailed content Template(s) Examples 14 Forecast height Day and time (in FCST VA CLD nn/nnnnZ FCST VA CLD 02/1245Z and position of UTC) (6 hours from +6 HR: SFC or FLnnn/[FL]nnn +6 HR: SFC/FL200 the ash clouds the “Time of [nnKM WID LINE2 BTN (nnNM WID N4230 E14048 – (+6 HR) (M) observation of ash” LINE BTN)] N4232 E14150 – given in Item 12); Nnn[nn] or Snn[nn] Wnnn[nn] or N4238 E14300 – Ennn[nn] – N4246 E14230 Forecast height and Nnn[nn] or Snn[nn] Wnnn[nn] or FL200/350 position (in degrees Ennn[nn][ – N4230 E14048 – and minutes) for Nnn[nn] or Snn[nn] Wnnn[nn] or N4232 E14150 – each cloud mass for Ennn[nn] – N4238 E14300 – that fixed valid time Nnn[nn] or Snn[nn] Wnnn[nn] or N4246 E14230 Ennn[nn] – FL350/600 Nnn[nn] or Snn[nn] Wnnn[nn] or NO VA EXP Ennn[nn]]3 NOT AVBL or NOT PROVIDED NO VA EXP or NOT AVBL or NOT PROVIDED

15 Forecast height Day and time (in FCST VA CLD nn/nnnnZ FCST VA CLD 02/1845Z and position of UTC) (12 hours from +12 HR: SFC or FLnnn/[FL]nnn +12 HR: SFC/FL300 the ash clouds the “Time of [nnKM WID LINE2 BTN (nnNM WID N4230 E14048 – (+12 HR) (M) observation of ash” LINE BTN)] N4232 E14150 – given in Item 12); Nnn[nn] or Snn[nn] Wnnn[nn] or N4238 E14300 – Ennn[nn] – N4246 E14230 Forecast height and Nnn[nn] or Snn[nn] Wnnn[nn] or FL300/600 position (in degrees Ennn[nn][ – NO VA EXP and minutes) for Nnn[nn] or Snn[nn] Wnnn[nn] or NOT AVBL each cloud mass for Ennn[nn] – NOT PROVIDED that fixed valid time Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]]3 or NO VA EXP or NOT AVBL or NOT PROVIDED

16 Forecast height Day and time (in FCST VA CLD nn/nnnnZ FCST VA CLD 03/0045Z and position of UTC) (18 hours from +18 HR: SFC or FLnnn/[FL]nnn +18 HR: SFC/FL600 the ash clouds the “Time of [nnKM WID LINE2 BTN (nnNM WID NO VA EXP (+18 HR) (M) observation of ash” LINE BTN)] NOT AVBL given in Item 12); Nnn[nn] or Snn[nn] Wnnn[nn] NOT PROVIDED or Ennn[nn] – Forecast height and Nnn[nn] or Snn[nn] Wnnn[nn] position (in degrees or Ennn[nn][ – and minutes) for Nnn[nn] or Snn[nn] Wnnn[nn] each cloud mass for or Ennn[nn] – that fixed valid time Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]]3 or NO VA EXP or NOT AVBL or NOT PROVIDED IAVWOPSG/4-WP/3 Appendix B B-6

Element Detailed content Template(s) Examples . . . 12

Notes.—

1. International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI). 2. A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle. 3. Up to 4 selected layers. 4. If ash reported (e.g. AIREP) but not identifiable from satellite data.

. . . 13

APPENDIX 6. TECHNICAL SPECIFICATIONS RELATED TO SIGMET AND AIRMET INFORMATION, AERODROME WARNINGS AND WIND SHEAR WARNINGS AND ALERTS (See Chapter 7 of this Annex.)

. . . 14

5.1 Format and dissemination of aerodrome warnings

. . . 15

5.1.3 Recommendation.— In accordance with the template in Table A6-2, aerodrome warnings should relate to the occurrence or expected occurrence of one or more of the following phenomena:

. . . 16

— volcanic ash — tsunami — volcanic ash deposition — toxic chemicals — other phenomena as agreed locally.

. . . 17

Editorial Note.— In table A6-1, replace “LOC” by “PSN” on the row “Phenomenon”. IAVWOPSG/4-WP/3 B-7 Appendix B

Table A6-2. Template for aerodrome warnings

Key: M = inclusion mandatory, part of every message; C = inclusion conditional, included whenever applicable.

Note 1.— The ranges and resolutions for the numerical elements included in aerodrome warnings are shown in Table A6-4 of this appendix.

Note 2.— The explanations for the abbreviations can be found in the Procedures for Air Navigation Services — ICAO Abbreviations and Codes (PANS-ABC, Doc 8400).

Element Detailed content Template Example . . . 18 IF THE AERODROME WARNING IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE. Phenomenon (M)2 Description of phenomenon TC3 nnnnnnnnnn or TC ANDREW causing the issuance of the [HVY] TS or HVY SN 25CM aerodrome warning GR or SFC WSPD 80KMH MAX 120 [HVY] SN [nnCM]3 or VA [HVY] FZRA or [HVY] FZDZ or RIME4 or TSUNAMI [HVY] SS or [HVY] DS or SA or DU or SFC WSPD nn[n]KMH MAX nn[n] (SFC WSPD nn[n]KT MAX nn[n]) or SQ or FROST or TSUNAMI or VA[DEPOSITION] or TOXIC CHEMICALS or Free text up to 32 characters 5 . . . 19

Notes.—

. . . 20

2. One phenomenon or a combination thereof, in accordance with 5.1.3. 3. In accordance with 5.1.3. 4. Hoar frost or rime in accordance with 5.1.3. 5. In accordance with 5.1.4. . . . 21

IAVWOPSG/4-WP/3 Appendix C

APPENDIX C

NOTES ON THE PRESENTATION OF THE PROPOSED AMENDMENT TO ANNEX 15

The text of the proposed amendment is arranged to show deleted text with a line through it and new text highlighted with grey shading as shown below:

1. text to be deleted is shown with a line through it text to be deleted

2. new text to be inserted is highlighted with grey new text to be inserted shading

3. text to be deleted is shown with a line through it new text to replace existing text followed by the new text which is highlighted with grey shading IAVWOPSG/4-WP/3 Appendix C C-2

PROPOSED AMENDMENT TO INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES

AERONAUTICAL INFORMATION SERVICES

ANNEX 15 TO THE CONVENTION OF INTERNATIONAL CIVIL AVIATION

TWELFTH EDITION — JULY 2004

. . . 22

CHAPTER 5. NOTAM

5.1 Origination

. . . 23

5.1.1.1 A NOTAM shall be originated and issued concerning the following information:

a) establishment, closure or significant changes in operation of aerodrome(s)/heliport(s) or runways;

. . . 24

r) presence or removal of, or significant changes in, hazardous conditions due to snow, slush, ice, volcanic ash deposition or water on the movement area;

. . . 25

— END —