AppendixAppendix
Appendix 6
| Template for advisory for volcanic ash Key: M = inclusion mandatory; O = inclusion optional; C = inclusion conditional, included whenever applicable. Note 1: The ranges and resolutions for the numerical elements included in volcanic ash advisory are shown in Appendix 8. Note 2: The explanations for the abbreviations can be found in ICAO Doc 8400 Procedures for Air Navigation Services — ICAO Abbreviations and Codes (PANS-ABC). Note 3: The inclusion of a colon (‘:’) after each element heading is mandatory. Note 4: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the advisory for volcanic ash. | ||||
|---|---|---|---|---|
| Ref. | Element | Detailed content | Template(s) | |
| 1 | Identification of the type of message (M) | Type of message | VA ADVISORY | |
| 2 | New line | |||
| 3 | Status indicator (C) () | Indicator of test or exercise | STATUS: | TEST or EXER |
| 4 | New line | |||
| 5 | Time of origin (M) | Year, month, day, time in UTC | DTG: | nnnnnnnn/nnnnZ |
| 6 | New line | |||
| 7 | Name of VAAC (M) | Name of VAAC | VAAC: | nnnnnnnnnnnn |
| 8 | New line | |||
| 9 | Name of volcano (M) | Name and International Association of Volcanology and Chemistry of the Earth’s Interior number of volcano | VOLCANO: | nnnnnnnnnnnnnnnnnnnnnn [nnnnnn] or UNKNOWN or UNNAMED |
| 10 | New line | |||
| 11 | Location of volcano (M) | Location of volcano in degrees and minutes | PSN: | Nnnnn or Snnnn Wnnnnn or Ennnnn or UNKNOWN |
| 12 | New line | |||
| 13 | State or region (M) | State, or region if ash is not reported over a State | AREA: | nnnnnnnnnnnnnnnn or UNKNOWN |
| 14 | New line | |||
| 15 | Summit elevation (M) | Summit elevation in m (or ft) | SUMMIT ELEV: | nnnnM (or nnnnnFT) or SFC or UNKNOWN |
| 16 | New line | |||
| 17 | Advisory number (M) | Advisory number: year in full and message number (separate sequence for each volcano) | ADVISORY NR: | nnnn/nnnn |
| 18 | New line | |||
| 19 | Information source (M) | Information source using free text | INFO SOURCE: | Free text up to 32 characters |
| 20 | New line | |||
| 21 | Colour code (O) | Aviation colour code | AVIATION COLOUR CODE: | RED or ORANGE or YELLOW or GREEN or UNKNOWN or NOT GIVEN or NIL |
| 22 | New line | |||
| 23 | Eruption details (M) () | Eruption details (including date/time of eruption(s)) | ERUPTION DETAILS: | Free text up to 64 characters or UNKNOWN |
| 24 | New line | |||
| 25 | Time of observation (or estimation) of volcanic ash clouds (M) | Day and time (in UTC) of observation (or estimation) of volcanic ash clouds | OBS (or EST) VA DTG: | nn/nnnnZ |
| 26 | New line | |||
| 27 | Observed or estimated volcanic ash clouds (M) | Horizontal (in degrees and minutes) and vertical extent at the time of observation of the observed or estimated volcanic ash clouds or, if the base is unknown, the top of the observed or estimated volcanic ash clouds; Movement of the observed or estimated volcanic ash clouds | OBS VA CLD or EST VA CLD: | TOP FLnnn or SFC/FLnnn or FLnnn/nnn [nnKM WID LINE BTN (nnNM WID LINE BTN)] Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn][ – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]] 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) or VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FLnnn/nnn nnn/nn[n]KT () or WIND FLnnn/nnn VRBnnKT or WIND SFC/FLnnn nnn/nn[n]KT or WIND SFC/FLnnn VRBnnKT |
| 28 | New line | |||
| 29 | Forecast height and position of the volcanic ash clouds (+6 HR) (M) | Day and time (in UTC) (6 hours from the ‘Time of observation (or estimation) of volcanic ash clouds’ given in Item 12) Forecast height and position (in degrees and minutes) for each volcanic ash cloud mass for that fixed valid time | FCST VA CLD +6 HR: | nn/nnnnZ SFC or FLnnn/[FL]nnn [nnKM WID LINE BTN (nnNM WID LINE BTN)]Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn][ – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]] (),() or NO VA EXP or NOT AVBL or NOT PROVIDED |
| 30 | New line | |||
| 31 | Forecast height and position of the volcanic ash clouds (+12 HR) (M) | Day and time (in UTC) (12 hours from the ‘Time of observation (or estimation) of volcanic ash clouds’ given in Item 12) Forecast height and position (in degrees and minutes) for each volcanic ash cloud mass for that fixed valid time | FCST VA CLD +12 HR: | nn/nnnnZ SFC or FLnnn/[FL]nnn [nnKM WID LINE BTN (nnNM WID LINE BTN)] Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn][ – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]] (),() or NO VA EXP or NOT AVBL or NOT PROVIDED |
| 32 | New line | |||
| 33 | Forecast height and position of the volcanic ash clouds (+18 HR) | Day and time (in UTC) (18 hours from the ‘Time of observation (or estimation) of volcanic ash clouds’ given in Item 12) Forecast height and position (in degrees and minutes) for each volcanic ash cloud mass for that fixed valid time | FCST VA CLD +18 HR: | nn/nnnnZ SFC or FLnnn/[FL]nnn [nnKM WID LINE BTN (nnNM WID LINE BTN)] Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn][ – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] (),() or NO VA EXP or NOT AVBL or NOT PROVIDED |
| 34 | New line | |||
| 35 | Remarks (M) () | Remarks, as necessary | RMK: | Free text up to 256 characters or NIL |
| 36 | New line | |||
| 37 | Next advisory (M) | Year, month, day and time in UTC | NXT ADVISORY: | nnnnnnnn/nnnnZ or NO LATER THAN nnnnnnnn/nnnnZ or NO FURTHER ADVISORIES or WILL BE ISSUED BY nnnnnnnn/nnnnZ |
APPENDIX · Appendix 6 — Regulation (EU) 2017/373 · Regulation (EU) 2021/1338 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025