Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 laying down common requirements for providers of air traffic management/air navigation services and other air traffic management network functions and their oversight, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011, (EU) No 1035/2011 and (EU) 2016/1377 and amending Regulation (EU) No 677/2011 (Text with EEA relevance. )

• Note 1: The ranges and resolutions for the numerical elements included in SIGMET or AIRMET are shown in Appendix 8.

• Note 2: Severe or moderate icing (SEV ICE, MOD ICE) and severe or moderate turbulence (SEV TURB, MOD TURB) associated with thunderstorms, cumulonimbus clouds or tropical cyclones should not be included.

• Note 3: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the SIGMET or AIRMET.

Ref.	Element	Detailed content	SIGMET template	AIRMET template
1	Location indicator of FIR/CTA (M)	ICAO location indicator of the ATS unit serving the FIR or CTA to which the SIGMET/AIRMET refers	nnnn	nnnn
2	Identification (M)	SIGMET or AIRMET identification and sequence number	SIGMET nnn	AIRMET [n][n]n
3	Validity period (M)	Day-time groups indicating the period of validity in UTC	VALID nnnnnn/nnnnnn	VALID nnnnnn/nnnnnn
4	Location indicator of MWO (M)	Location indicator of MWO originating the SIGMET or AIRMET with a separating hyphen	nnnn–	nnnn–
5	New line	New line	New line	New line
6	Name of the FIR/CTA (M)	Location indicator and name of the FIR/CTA for which the SIGMET/AIRMET is issued	nnnn nnnnnnnnnn FIR or UIR or FIR/UIR or nnnn nnnnnnnnnn CTA	nnnn nnnnnnnnnn FIR[/n]
7	IF THE SIGMET OR AIRMET IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE.	IF THE SIGMET OR AIRMET IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE.	IF THE SIGMET OR AIRMET IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE.	IF THE SIGMET OR AIRMET IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE.
8	Status indicator (C) [^E0031]	Indicator of test or exercise	TEST or EXER	TEST or EXER
9	New line	New line	New line	New line
10	Phenomenon (M)	Description of the phenomenon causing the issuance of SIGMET/AIRMET	OBSC TS[GR] EMBD TS[GR] FRQ TS[GR] SQL TS[GR] TC nnnnnnnnnn PSN Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] CB or TC NN [^E0032] PSN Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] CB SEV TURB SEV ICE SEV ICE (FZRA) SEV MTW HVY DS HVY SS [VA ERUPTION] [MT nnnnnnnnnn] [PSN Nnn[nn] or Snn[nn] Ennn[nn] or Wnnn[nn]] VA CLD RDOACT CLD	SFC WIND nnn/nn[n]KT SFC VIS [n][n]nnM (nn) ISOL TS[GR] OCNL TS[GR] MT OBSC BKN CLD BKN CLD [n]nnn/[ABV][n]nnnnFT or BKN CLD SFC/[ABV][n]nnnnFT or OVC CLD [n]nnn/[ABV][n]nnnnFT or OVC CLD SFC/[ABV][n]nnnnFT ISOL CB OCNL CB FRQ CB ISOL TCU OCNL TCU FRQ TCU MOD TURB MOD ICE MOD MTW
11	Observed or forecast phenomenon (M) [^E0033], [^E0034]	Indication whether the information is observed and expected to continue, or forecast	OBS [AT nnnnZ] or FCST [AT nnnnZ]	OBS [AT nnnnZ] or FCST [AT nnnnZ]
12	Location (C) [^E0033], [^E0034], [^E0035]	Location (referring to latitude and longitude (in degrees and minutes))	Nnn[nn] Wnnn[nn] or Nnn[nn] Ennn[nn] or Snn[nn] Wnnn[nn] or Snn[nn] Ennn[nn] or N OF Nnn[nn] or S OF Nnn[nn] or N OF Snn[nn] or S OF Snn[nn] or [AND] W OF Wnnn[nn] or E OF Wnnn[nn] or W OF Ennn[nn] or E OF Ennn[nn] or N OF Nnn[nn] or N OF Snn[nn] AND S OF Nnn[nn] or S OF Snn[nn] or W OF Wnnn[nn] or W OF Ennn[nn] AND E OF Wnnn[nn] or E OF Ennn[nn] or N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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]] [AND N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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 WI 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]] [^E0036] or ENTIRE UIR or ENTIRE FIR or ENTIRE FIR/UIR or ENTIRE CTA or WI nnnKM (or nnnNM) OF TC CENTRE [^E0037] or WI nnKM (or nnNM) OF Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] [^E0038]	Nnn[nn] Wnnn[nn] or Nnn[nn] Ennn[nn] or Snn[nn] Wnnn[nn] or Snn[nn] Ennn[nn] or N OF Nnn[nn] or S OF Nnn[nn] or N OF Snn[nn] or S OF Snn[nn] or [AND] W OF Wnnn[nn] or E OF Wnnn[nn] or W OF Ennn[nn] or E OF Ennn[nn] or N OF Nnn[nn] or N OF Snn[nn] AND S OF Nnn[nn] or S OF Snn[nn] or W OF Wnnn[nn] or W OF Ennn[nn] AND E OF Wnnn[nn] or E OF Ennn[nn] or N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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]] [AND N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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 WI 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]] [^E0036] or ENTIRE UIR or ENTIRE FIR or ENTIRE FIR/UIR or ENTIRE CTA or WI nnnKM (or nnnNM) OF TC CENTRE [^E0037] or WI nnKM (or nnNM) OF Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] [^E0038]
13	Level (C)	Flight level or altitude	[SFC/]FLnnn or [SFC/][n]nnnnFT (or [SFC/]nnnnM) FLnnn/nnn or TOP FLnnn or [TOP] ABV FLnnn or (or [TOP] ABV [n]nnnnFT) [[n]nnnn/][n]nnnnFT) or [n]nnnnFT/]FLnnn or TOP [ABV or BLW] FLnnn [^E0037]	[SFC/]FLnnn or [SFC/][n]nnnnFT (or [SFC/]nnnnM) FLnnn/nnn or TOP FLnnn or [TOP] ABV FLnnn or (or [TOP] ABV [n]nnnnFT) [[n]nnnn/][n]nnnnFT) or [n]nnnnFT/]FLnnn or TOP [ABV or BLW] FLnnn [^E0037]
14	Movement or expected movement (C) [^E0033], [^E0039], [^E0040]	Movement or expected movement (direction and speed) with reference to one of the 16 points of compass, or stationary	MOV N [nnKMH] or MOV NNE [nnKMH] or MOV NE [nnKMH] or MOV ENE [nnKMH] or MOV E [nnKMH] or MOV ESE [nnKMH] or MOV SE [nnKMH] or MOV SSE [nnKMH] or MOV S [nnKMH] or MOV SSW [nnKMH] or MOV SW [nnKMH] or MOV WSW [nnKMH] or MOV W [nnKMH] or MOV WNW [nnKMH] or MOV NW [nnKMH] or MOV NNW [nnKMH] (or MOV N [nnKT] or MOV NNE [nnKT] or MOV NE [nnKT] or MOV ENE [nnKT] or MOV E [nnKT] or MOV ESE [nnKT] or MOV SE [nnKT] or MOV SSE [nnKT] or MOV S [nnKT] or MOV SSW [nnKT] or MOV SW [nnKT] or MOV WSW [nnKT] or MOV W [nnKT] or MOV WNW [nnKT] or MOV NW [nnKT] or MOV NNW [nnKT]) or STNR	MOV N [nnKMH] or MOV NNE [nnKMH] or MOV NE [nnKMH] or MOV ENE [nnKMH] or MOV E [nnKMH] or MOV ESE [nnKMH] or MOV SE [nnKMH] or MOV SSE [nnKMH] or MOV S [nnKMH] or MOV SSW [nnKMH] or MOV SW [nnKMH] or MOV WSW [nnKMH] or MOV W [nnKMH] or MOV WNW [nnKMH] or MOV NW [nnKMH] or MOV NNW [nnKMH] (or MOV N [nnKT] or MOV NNE [nnKT] or MOV NE [nnKT] or MOV ENE [nnKT] or MOV E [nnKT] or MOV ESE [nnKT] or MOV SE [nnKT] or MOV SSE [nnKT] or MOV S [nnKT] or MOV SSW [nnKT] or MOV SW [nnKT] or MOV WSW [nnKT] or MOV W [nnKT] or MOV WNW [nnKT] or MOV NW [nnKT] or MOV NNW [nnKT]) or STNR
15	Changes in intensity (C) [^E0033]	Expected changes in intensity	INTSF or WKN or NC	INTSF or WKN or NC
16	Forecast time (C) [^E0033], [^E0034], [^E0039]	Indication of the forecast time of the phenomenon	FCST AT nnnnZ	—
17	TC forecast position (C) [^E0037]	Forecast position of the TC centre	TC CENTRE PSN Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] or TC CENTRE PSN Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] CB [^E0041]	—
18	Forecast position (C) [^E0033], [^E0034], [^E0035], [^E0039]	Forecast position of the phenomenon at the end of the validity period of the SIGMET [^E0042]	Nnn[nn] Wnnn[nn] or Nnn[nn] Ennn[nn] or Snn[nn] Wnnn[nn] or Snn[nn] Ennn[nn] or N OF Nnn[nn] or S OF Nnn[nn] or N OF Snn[nn] or S OF Snn[nn] [AND] W OF Wnnn[nn] or E OF Wnnn[nn] or W OF Ennn[nn] or E OF Ennn[nn] or N OF Nnn[nn] or N OF Snn[nn] AND S OF Nnn[nn] or S OF Snn[nn] or W OF Wnnn[nn] or W OF Ennn[nn] AND E OF Wnnn[nn] or E OF Ennn[nn] or N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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]] [AND N OF LINE or NE OF LINE or E OF LINE or SE OF LINE or S OF LINE or SW OF LINE or W OF LINE or NW OF LINE 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 WI 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] [^E0036] or ENTIRE FIR or ENTIRE UIR or ENTIRE FIR/UIR or ENTIRE CTA or NO VA EXP [^E0043] or WI nnKM (or nnNM) OF Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] [^E0038] or WI nnnKM (nnnNM) OF TC CENTRE [^E0037]	—
19	Repetition of elements (C) [^E0044]	Repetition of elements included in a SIGMET for volcanic ash cloud or tropical cyclone	[AND] [^E0044]	—
20	New line if repeating elements	New line if repeating elements	New line if repeating elements	New line if repeating elements
	OR	OR	OR	OR
21	Cancellation of SIGMET/AIRMET (C)	Cancellation of SIGMET/AIRMET referring to its identification	CNL SIGMET nnn nnnnnn/nnnnnn or CNL SIGMET nnn nnnnnn/nnnnnn [VA MOV TO nnnn FIR] [^E0043]	CNL AIRMET [n][n]n nnnnnn/nnnnnn

Used only when SIGMET/AIRMET is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

Used for unnamed tropical cyclones.

In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

For SIGMET for radioactive cloud, only within (WI) is to be used for the elements ‘location’ and ‘forecast position’.

The number of coordinates are to be kept to a minimum and should not normally exceed seven.

Only for SIGMET for tropical cyclones.

Only for SIGMET for radioactive cloud. A radius of up to 30 kilometres (or 16 nautical miles) from the source and a vertical extent from surface (SFC) to the upper limit of the flight information region/upper flight information region (FIR/UIR) or control area (CTA) is to be applied.

The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

For SIGMET for radioactive cloud, only stationary (STNR) is to be used for the element ‘movement or expected movement’.

The term ‘CB’ is to be used when the forecast position for the cumulonimbus cloud is included.

The forecast position for cumulonimbus (CB) cloud occurring in connection with tropical cyclones relates to the forecast time of the tropical cyclone centre position, not to the end of the validity period of the SIGMET.

Only for SIGMET for volcanic ash.

To be used for more than one volcanic ash clouds or cumulonimbus clouds associated with a tropical cyclone simultaneously affecting the FIR concerned.

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)	Template(s)
1	Identification of the type of message (M)	Type of message	VA ADVISORY	VA ADVISORY
2	New line	New line	New line	New line
3	Status indicator (C) [^E0045]	Indicator of test or exercise	STATUS:	TEST or EXER
4	New line	New line	New line	New line
5	Time of origin (M)	Year, month, day, time in UTC	DTG:	nnnnnnnn/nnnnZ
6	New line	New line	New line	New line
7	Name of VAAC (M)	Name of VAAC	VAAC:	nnnnnnnnnnnn
8	New line	New line	New line	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	New line	New line	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	New line	New line	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	New line	New line	New line
15	Summit elevation (M)	Summit elevation in m (or ft)	SUMMIT ELEV:	nnnnM (or nnnnnFT) or SFC or UNKNOWN
16	New line	New line	New line	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	New line	New line	New line
19	Information source (M)	Information source using free text	INFO SOURCE:	Free text up to 32 characters
20	New line	New line	New line	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	New line	New line	New line
23	Eruption details (M) [^E0046]	Eruption details (including date/time of eruption(s))	ERUPTION DETAILS:	Free text up to 64 characters or UNKNOWN
24	New line	New line	New line	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	New line	New line	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 [^E0047] or WIND FLnnn/nnn VRBnnKT or WIND SFC/FLnnn nnn/nn[n]KT or WIND SFC/FLnnn VRBnnKT
28	New line	New line	New line	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]] [^E0048], [^E0049] or NO VA EXP or NOT AVBL or NOT PROVIDED
30	New line	New line	New line	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]] [^E0048], [^E0049] or NO VA EXP or NOT AVBL or NOT PROVIDED
32	New line	New line	New line	New line
33	Forecast height and position of the volcanic ash clouds (+ 18 HR) (M)	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] [^E0048], [^E0049] or NO VA EXP or NOT AVBL or NOT PROVIDED
34	New line	New line	New line	New line
35	Remarks (M) [^E0046]	Remarks, as necessary	RMK:	Free text up to 256 characters or NIL
36	New line	New line	New line	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

Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

The term ‘resuspended’ to be used for volcanic ash deposits raised by the wind.

If a volcanic ash cloud is reported (e.g. AIREP) but not identifiable from the satellite data.

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.

Up to four selected layers.

Appendix 7

Template for advisory for tropical cyclones

Key:

M	=	inclusion mandatory;
---	---	---
C	=	inclusion conditional, included whenever applicable;
---	---	---
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 tropical cyclone 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 tropical cyclones.

Ref.	Element	Detailed content	Template(s)	Template(s)
1	Identification of the type of message (M)	Type of message	TC ADVISORY
2	New line	New line	New line	New line
3	Status indicator (C) [^E0050]	Indicator of test or exercise	STATUS:	TEST or EXER
4	New line	New line	New line	New line
5	Time of origin (M)	Year, month, day and time of issue in UTC	DTG:	nnnnnnnn/nnnnZ
6	New line	New line	New line	New line
7	Name of TCAC (M)	Name of TCAC (location indicator or full name)	TCAC:	nnnn or nnnnnnnnnn
8	New line	New line	New line	New line
9	Name of tropical cyclone (M)	Name of tropical cyclone or‘NN’ for unnamed tropical cyclone	TC:	nnnnnnnnnnnn or NN
10	New line	New line	New line	New line
11	Advisory number (M)	Advisory: Year in full and message number (separate sequence for each tropical cyclone)	ADVISORY NR:	nnnn/[n][n][n]n
12	New line	New line	New line	New line
13	Observed position of the centre (M)	Day and time (in UTC) and position of the centre of the tropical cyclone (in degrees and minutes)	OBS PSN:	nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]
14	New line	New line	New line	New line
15	Observed CB cloud (O) [^E0051]	Location of CB cloud (referring to the latitude and longitude (in degrees and minutes)) and vertical extent (flight level)	CB:	WI nnnKM (or nnnNM) OF TC CENTRE or WI [^E0052] 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]] TOP [ABV or BLW] FLnnn NIL
16	New line	New line	New line	New line
17	Direction and speed of movement (M)	Direction and speed of movement given in 16 compass points and km/h (or kt) respectively or stationary (< 2 km/h (1 kt))	MOV:	N nnKMH (or KT) or NNE nnKMH (or KT) or NE nnKMH (or KT) or ENE nnKMH (or KT) or E nnKMH (or KT) or ESE nnKMH (or KT) or SE nnKMH (or KT) or SSE nnKMH (or KT) or S nnKMH (or KT) or SSW nnKMH (or KT) or SW nnKMH (or KT) or WSW nnKMH (or KT) or W nnKMH (or KT) or WNW nnKMH (or KT) or NW nnKMH (or KT) or NNW nnKMH (or KT) or STNR
18	New line	New line	New line	New line
19	Changes in intensity (M)	Changes of maximum surface wind speed at time of observation	INTST CHANGE:	INTSF or WKN or NC
20	New line	New line	New line	New line
21	Central pressure (M)	Central pressure (in hPa)	C:	nnnHPA
22	New line	New line	New line	New line
23	Maximum surface wind (M)	Maximum surface wind near the centre (mean surface wind over 10 minutes, in kt)	MAX WIND:	nn[n]KT
24	New line	New line	New line	New line
25	Forecast of centre position (+ 6 HR) (M)	Day and time (in UTC) (6 hours from the DTG given in Item 5); Forecast position (in degrees and minutes) of the centre of the tropical cyclone	FCST PSN +6 HR:	nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]
26	New line	New line	New line	New line
27	Forecast of maximum surface wind (+ 6 HR) (M)	Forecast of maximum surface wind (6 hours after the DTG given in Item 5)	FCST MAX WIND +6 HR:	nn[n]KT
28	New line	New line	New line	New line
29	Forecast of centre position (+ 12 HR) (M)	Day and time (in UTC) (12 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone	FCST PSN +12 HR:	nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]
30	New line	New line	New line	New line
31	Forecast of maximum surface wind (+ 12 HR) (M)	Forecast of maximum surface wind (12 hours after the DTG given in Item 5)	FCST MAX WIND +12 HR:	nn[n]KT
32	New line	New line	New line	New line
33	Forecast of centre position (+ 18 HR) (M)	Day and time (in UTC) (18 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone	FCST PSN +18 HR:	nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]
34	New line	New line	New line	New line
35	Forecast of maximum surface wind (+ 18 HR) (M)	Forecast of maximum surface wind (18 hours after the DTG given in Item 5)	FCST MAX WIND +18 HR:	nn[n]KT
36	New line	New line	New line	New line
37	Forecast of centre position (+ 24 HR) (M)	Day and time (in UTC) (24 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone	FCST PSN +24 HR:	nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]
38	New line	New line	New line	New line
39	Forecast of maximum surface wind (+ 24 HR) (M)	Forecast of maximum surface wind (24 hours after the DTG given in Item 5)	FCST MAX WIND +24 HR:	nn[n]KT
40	New line	New line	New line	New line
41	Remarks (M)	Remarks, as necessary	RMK:	Free text up to 256 characters or NIL
42	New line	New line	New line	New line
43	Expected time of issuance of next advisory (M)	Expected year, month, day and time (in UTC) of issuance of next advisory	NXT MSG:	[BFR] nnnnnnnn/nnnnZ or NO MSG EXP

Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

In the case of CB clouds associated with a tropical cyclone covering more than one area within the area of responsibility, this element can be repeated, as necessary.

The number of coordinates should be kept to a minimum and should not normally exceed seven.

Appendix 8

Ranges and resolutions for the numerical elements included in volcanic ash advisory, tropical cyclone advisory, SIGMET, AIRMET, aerodrome and wind shear warnings

• Note: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the template.

Ref.	Elements	Elements	Range	Resolution
1	Summit elevation:	FT	000–27 000	1
		M	000–8 100	1
2	Advisory number:	for VA (index) [^E0053]	000–2 000	1
		for TC (index) [^E0053]	00–99	1
3	Maximum surface wind:	KT	00–99	1
4	Central pressure:	hPa	850–1 050	1
5	Surface wind speed:	KT	30–99	1
6	Surface visibility:	M	0000–0750	50
		M	0800–5 000	100
7	Cloud: height of base:	FT	000–1 000	100
8	Cloud: height of top:	FT	000–9 900	100
		FT	10 000 –60 000	1 000
9	Latitudes:	° (degrees)	00–90	1
		(minutes)	00–60	1
10	Longitudes:	° (degrees)	000–180	1
		(minutes)	00–60	1
11	Flight levels:		000–650	10
12	Movement:	KMH	0–300	10
		KT	0–150	5

Non-dimensional.

ANNEX VI

SPECIFIC REQUIREMENTS FOR THE PROVIDERS OF AERONAUTICAL INFORMATION SERVICES

(Part-AIS)

SUBPART A – ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF AERONAUTICAL INFORMATION SERVICES (AIS.OR)

SECTION 1 – GENERAL REQUIREMENTS

AIS.OR.100 Aeronautical information management

An aeronautical information services (AIS) provider shall establish information management resources and processes that are adequate to ensure the timely collection, processing, storing, integration, exchange and delivery of quality-assured aeronautical data and aeronautical information within the ATM system.

AIS.OR.105 Responsibilities of aeronautical information services (AIS) providers

An AIS provider shall ensure the provision of aeronautical data and aeronautical information necessary for the safety, regularity and efficiency of air navigation.

An AIS provider shall receive, collate or assemble, edit, format, publish, store and distribute aeronautical data and aeronautical information concerning the entire territory of a Member State as well as those areas over the high seas in which the Member State is responsible for the provision of air traffic services.

An AIS provider shall ensure that aeronautical data and aeronautical information are available for:

• (1) personnel involved in flight operations, including flight crews, flight planning, and flight simulators;

• (2) ATS providers responsible for flight information service, and

• (3) the services responsible for pre-flight information.

An AIS provider shall provide 24-hour services for NOTAM origination and issuance in its area of responsibility and for pre-flight information needed in relation to route stages originating at the aerodrome/heliport in its area of responsibility.

An AIS provider shall make available to other AIS providers aeronautical data and aeronautical information required by them.

An AIS provider shall ensure that procedures are in place to assess and mitigate safety risks to aviation arising from data and information errors.

An AIS provider shall clearly indicate that aeronautical data and aeronautical information provided for and on behalf of a Member State are provided under the authority of that Member State, irrespective of the format in which it is provided.

SECTION 2 – DATA QUALITY MANAGEMENT

AIS.OR.200 General

An AIS provider shall ensure that:

• (a) aeronautical data and aeronautical information are provided in accordance with the specifications laid down in the aeronautical data catalogue, specified in Appendix 1 to Annex III (Part-ATM/ANS.OR);

• (b) data quality is maintained; and

• (c) automation is applied to enable the processing and exchange of digital aeronautical data.

AIS.OR.205 Formal arrangements

An AIS provider shall ensure that formal arrangements are established with:

• (a) all parties transmitting data to them; and

• (b) other AIS providers, when exchanging aeronautical data and aeronautical information with them.

AIS.OR.210 Exchange of aeronautical data and aeronautical information

An AIS provider shall ensure that:

• (a) the format of aeronautical data is based on an aeronautical information exchange model designed to be globally interoperable; and

• (b) aeronautical data is exchanged through electronic means.

AIS.OR.215 Tools and software

An AIS provider shall ensure that tools and software used to support or automate aeronautical data and aeronautical information processes perform their functions without adversely impacting on the quality of aeronautical data and aeronautical information.

AIS.OR.220 Validation and verification

An AIS provider shall ensure that verification and validation techniques are employed so that the aeronautical data meets the associated data quality requirements (DQRs) specified in point AIS.TR.200.

AIS.OR.225 Metadata

An AIS provider shall collect and preserve metadata.

AIS.OR.230 Data error detection and authentication

An AIS provider shall ensure that:

• (a) digital data error detection techniques are used during the transmission and/or storage of aeronautical data in order to support the applicable data integrity levels specified in point AIS.TR.200(c); and

• (b) the transfer of aeronautical data is subject to a suitable authentication process such that recipients are able to confirm that the data or information has been transmitted by an authorised source.

AIS.OR.235 Error reporting, error measurement, and corrective actions

An AIS provider shall ensure that error reporting, error measurement and corrective action mechanisms are established and maintained.

AIS.OR.240 Data limitations

An AIS provider shall identify, in the aeronautical information products, except for NOTAM, the aeronautical data and aeronautical information that do not meet the DQRs.

AIS.OR.250 Consistency requirement

Where aeronautical data or aeronautical information is duplicated in the AIP of more than one Member State, the AIS providers responsible for those AIPs shall establish mechanisms to ensure consistency between the duplicated information.

SECTION 3 – AERONAUTICAL INFORMATION PRODUCTS

AIS.OR.300 General – Aeronautical information products

When providing aeronautical data and aeronautical information in multiple formats, an AIS provider shall ensure that processes are implemented for data and information consistency between those formats.

Chapter 1 – Aeronautical information in a standardised presentation

AIS.OR.305 Aeronautical information publication (AIP)

An AIS provider shall issue an AIP.

AIS.OR.310 AIP amendments

An AIS provider shall:

• (a) issue permanent changes to the AIP as AIP amendments; and

• (b) ensure that the AIP is amended or reissued at such regular intervals as necessary to ensure that the information is complete and up to date.

AIS.OR.315 AIP supplements

An AIS provider shall:

• (a) issue, as AIP supplements, temporary changes of long duration – three months or longer – and information of short duration which contains extensive text and/or graphics;

• (b) regularly provide a checklist of the valid AIP supplements; and

• (c) publish a new AIP supplement as a replacement when an error occurs in an AIP supplement or when the period of validity of an AIP supplement is changed.

AIS.OR.320 Aeronautical information circular (AIC)

An AIS provider shall issue as an AIC any of the following:

• (a) a long-term forecast of any major change in legislation, regulations, procedures or facilities;

• (b) information of a purely explanatory or advisory nature which affects flight safety;

• (c) information or notification of an explanatory or advisory nature, concerning technical, legislative or purely administrative matters.

An AIS provider shall review at least once a year the validity of an AIC in force.

AIS.OR.325 Aeronautical charts

An AIS provider shall ensure that the following aeronautical charts, where made available:

• (a) form part of the AIP or are provided separately to recipients of the AIP:
• (1) aerodrome obstacle chart – Type A;
• (2) aerodrome/heliport chart;
• (3) aerodrome ground movement chart;
• (4) aircraft parking/docking chart;
• (5) precision approach terrain chart;
• (6) ATC surveillance minimum altitude chart;
• (7) area chart;
• (8) standard arrival chart – instrument (STAR);
• (9) standard departure chart – instrument (SID);
• (10) instrument approach chart;
• (11) visual approach chart; and
• (12) en-route chart; and

• (b) are provided as part of the aeronautical information products:
• (1) aerodrome obstacle chart – Type B;
• (2) world aeronautical chart 1:1 000 000;
• (3) world aeronautical chart 1:500 000;
• (4) aeronautical-navigation chart – small scale; and
• (5) plotting chart.

AIS.OR.330 NOTAM

An AIS provider shall:

• (a) promptly issue a NOTAM whenever the information to be distributed is of a temporary nature and of short duration or when operationally significant permanent changes, or temporary changes of long duration, are made at short notice, except for extensive text and/or graphics; and

• (b) issue, as a NOTAM, information on the establishment, condition, or change of any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel involved with flight operations;

Compliance with point AIS.OR.200 shall not inhibit the urgent distribution of aeronautical information necessary to ensure the safety of flight.

Chapter 2 – Digital data sets

AIS.OR.335 General – Digital data sets

If available, an AIS provider shall ensure that digital data is in the form of the following data sets:

• (1) AIP data set;

• (2) terrain data set;

• (3) obstacle data sets;

• (4) aerodrome mapping data sets; and

• (5) instrument flight procedure data sets.

When made available, terrain data shall be provided in the form of terrain data sets.

A checklist of valid data sets shall be regularly provided.

AIS.OR.340 Metadata requirements

Each data set shall include a minimum set of metadata to be provided to the next user.

AIS.OR.345 AIP data set

An AIS provider shall ensure that the AIP data set, if available, contains the digital representation of aeronautical information of lasting character, including permanent information and long-duration temporary changes.

AIS.OR.350 Terrain and obstacle data – General requirements

An AIS provider shall ensure that terrain and obstacle data, if available, are provided in accordance with point AIS.TR.350.

AIS.OR.355 Terrain data sets

An AIS provider shall ensure that terrain data, if available, is provided:

• (a) for Area 1, as laid down in point AIS.TR.350; and

• (b) for aerodromes to cover:
• (1) Area 2a or parts thereof, as laid down in point AIS.TR.350(b)(1);
• (2) Areas 2b, 2c and 2d or parts thereof, as laid down in points AIS.TR.350(b)(2), (3) and (4), for terrain:
• (i) within 10 km from the aerodrome reference point (ARP); and
• (ii) beyond 10 km from the ARP if the terrain penetrates the horizontal plane 120 m above the lowest runway elevation;
• (3) the take-off flight path area or parts thereof;
• (4) an area, or parts thereof, bounded by the lateral extent of the aerodrome obstacle limitation surfaces;
• (5) Area 3 or parts thereof, as laid down in point AIS.TR.350(c), for terrain that extends 0.5 m above the horizontal plane, passing through the nearest point on the aerodrome movement area; and
• (6) Area 4 or parts thereof, as laid down in point AIS.TR.350(d), for all runways where precision approach Category II or III operations have been established and where detailed terrain information is required by operators to enable them to assess the effect of terrain on decision height determination by use of radio altimeters.

AIS.OR.360 Obstacle data sets

An AIS provider shall ensure that obstacle data, if available, is provided:

• (a) for obstacles in Area 1 whose height is 100 m or higher above ground;

• (b) for aerodromes, for all obstacles within Area 2 that are assessed as being a hazard to air navigation; and

• (c) for aerodromes, to cover:
• (1) Area 2a or parts thereof, for those obstacles that penetrate the relevant obstacle data collection surface;
• (2) objects in the take-off flight path area or parts thereof, which project above a plane surface having a 1,2 % slope and having a common origin with the take-off flight path area;
• (3) penetrations of the aerodrome obstacle limitation surfaces or parts thereof;
• (4) Areas 2b, 2c and 2d, for obstacles that penetrate the relevant obstacle data collection surfaces;
• (5) Area 3 or parts thereof, for obstacles that penetrate the relevant obstacle data collection surface; and
• (6) Area 4 or parts thereof, for all runways where precision approach Category II or III operations have been established.

AIS.OR.365 Aerodrome mapping data sets

An AIS provider shall ensure that aerodrome mapping data sets, if available, are provided in accordance with point AIS.TR.365.

AIS.OR.370 Instrument flight procedure data sets

An AIS provider shall ensure that instrument flight procedure data sets, if available, are provided in accordance with point AIS.TR.370.

SECTION 4 – DISTRIBUTION AND PRE-FLIGHT INFORMATION SERVICES

AIS.OR.400 Distribution services

An AIS provider shall:

• (a) distribute available aeronautical information products to those users who request them;

• (b) make available the AIP, AIP amendments, AIP supplements, NOTAM and AIC by the most expeditious means;

• (c) ensure that NOTAM are distributed through the aeronautical fixed service (AFS), whenever practicable;

• (d) ensure that international exchange of NOTAM takes place only as mutually agreed between the international NOTAM offices and multinational NOTAM processing units concerned; and

• (e) arrange, as necessary, the issuance and receipt of NOTAM distributed by telecommunication to satisfy operational requirements.

AIS.OR.405 Pre-flight information services

An AIS provider shall ensure that:

• (a) for any aerodrome/heliport, aeronautical information relative to the route stages originating at the aerodrome/heliport is made available to flight operations personnel, including flight crew and services responsible for pre-flight information; and

• (b) aeronautical information provided for pre-flight planning purposes includes information of operational significance from the elements of the aeronautical information products.

SECTION 5 – AERONAUTICAL INFORMATION PRODUCTS UPDATES

AIS.OR.500 General – Aeronautical information products updates

An AIS provider shall ensure that aeronautical data and aeronautical information are amended or reissued to keep them up to date.

AIS.OR.505 Aeronautical information regulation and control (AIRAC)

An AIS provider shall ensure that information concerning the circumstances listed in point AIS.TR.505(a) is distributed under the AIRAC system.

An AIS provider shall ensure that:

• (1) the information notified under the AIRAC system is not changed further for at least another 28 days after the AIRAC effective date unless the circumstance notified is of a temporary nature and would not persist for the full period;

• (2) the information provided under the AIRAC system is distributed/made available so as to reach recipients at least 28 days in advance of the AIRAC effective date; and

• (3) implementation dates other than the AIRAC effective dates are not used for pre-planned operationally significant changes requiring cartographic work and/or for updating of navigation databases.

AIS.OR.510 NOTAM

An AIS provider shall:

• (a) ensure that NOTAM are provided in accordance with point AIS.TR.510; and

• (b) provide a ‘trigger NOTAM’, as laid down in point AIS.TR.510(f), when an AIP amendment or an AIP supplement is published in accordance with AIRAC procedures.

AIS.OR.515 Data set updates

An AIS provider shall:

• (a) amend or reissue data sets at such regular intervals as may be necessary to keep them up to date; and

• (b) issue permanent changes and temporary changes of long duration – three months or longer – made available as digital data in the form of a complete data set and/or a subset that includes only the differences from the previously issued complete data set.

SECTION 6 – PERSONNEL REQUIREMENTS

AIS.OR.600 General requirements

In addition to point ATM/ANS.OR.B.005(a)(6) of Annex III, the AIS provider shall ensure that personnel responsible for the provision of aeronautical data and aeronautical information is:

• (a) made aware of and applies the following:
• (1) the requirements on aeronautical information products and services, as specified in Sections 2 to 5;
• (2) the update cycles applicable to the issuing of AIP amendments and AIP supplements for the areas for which they provide aeronautical data or aeronautical information;

• (b) adequately trained, competent and authorised for the job they are required to do.

SUBPART B – ADDITIONAL TECHNICAL REQUIREMENTS FOR PROVIDERS OF AERONAUTICAL INFORMATION SERVICES (AIS.TR)

SECTION 2 – DATA QUALITY MANAGEMENT

AIS.TR.200 General

• (a) The accuracy of aeronautical data shall be as specified in the aeronautical data catalogue (‘data catalogue’), specified in Appendix 1 to Annex III (Part-ATM/ANS.OR).

• (b) The resolution of aeronautical data shall be commensurate with the actual data accuracy.

• (c) The integrity of aeronautical data shall be maintained. Based on the integrity classification specified in the data catalogue, procedures shall be put in place so that:
• (1) for routine data, corruption is avoided throughout the processing of the data;
• (2) for essential data, corruption does not occur at any stage of the entire process and additional processes are included, as needed, to address potential risks in the overall system architecture to further assure data integrity at this level;
• (3) for critical data, corruption does not occur at any stage of the entire process and additional integrity assurance processes are included to fully mitigate the effects of faults identified by thorough analysis of the overall system architecture as potential data integrity risks.

• (d) The traceability of aeronautical data shall be ensured.

• (e) The timeliness of the aeronautical data shall be ensured, including any limits on the effective period of the data.

• (f) The completeness of the aeronautical data shall be ensured.

• (g) The format of delivered data shall be adequate to ensure that the data is interpreted in a manner that is consistent with its intended use.

AIS.TR.210 Exchange of aeronautical data and aeronautical information

Except for terrain data, the exchange format of aeronautical data shall:

• (a) enable the exchange of data for both individual features and feature collections;

• (b) enable the exchange of baseline information as a result of permanent changes;

• (c) be structured in accordance with the subjects and properties of the aeronautical data catalogue, and be documented through a mapping between the exchange format and the aeronautical data catalogue.

AIS.TR.220 Verification

• (a) The verification shall ensure that:
• (1) the aeronautical data was received without corruption;
• (2) the aeronautical data process does not introduce corruption.

• (b) Aeronautical data and aeronautical information entered manually shall be subject to independent verification to identify any errors that may have been introduced.

AIS.TR.225 Metadata

The metadata to be collected shall include, as a minimum:

• (a) the identification of the organisations or entities performing any action of originating, transmitting or manipulating the aeronautical data;

• (b) the action performed;

• (c) the date and time the action was performed.

AIS.TR.235 Error reporting, error measurement and corrective actions

The error reporting, error measurement and corrective mechanisms shall ensure that:

• (a) problems identified during origination, production, storage, handling and processing, or those reported by users after publication, are recorded;

• (b) all problems reported in relation to the aeronautical data and aeronautical information are analysed by the AIS provider and the necessary corrective actions are performed;

• (c) priority is given to resolution of all errors, inconsistencies and anomalies detected in critical and essential aeronautical data;

• (d) affected users are warned of errors by the most effective means, taking into account the integrity level of the aeronautical data and aeronautical information;

• (e) error feedback is facilitated and encouraged.

AIS.TR.240 Data limitations

The identification of data not meeting the DQRs shall be made with an annotation or by explicitly providing the quality value.

SECTION 3 – AERONAUTICAL INFORMATION PRODUCTS

AIS.TR.300 General – Aeronautical information products

• (a) Aeronautical information products intended for distribution shall include English text for those parts expressed in plain language, except those products intended to be distributed solely within a Member State.

• (b) Place names shall be spelt in conformity with local usage and transliterated, when necessary, into the International Organization for Standardization (ISO) basic Latin alphabet.

• (c) International Civil Aviation Organization (ICAO) abbreviations shall be used in the aeronautical information products whenever they are appropriate.

Chapter 1 – Aeronautical information in a standardised presentation

AIS.TR.305 Aeronautical information publication (AIP)

• (a) The AIP, AIP amendments and AIP supplements shall be provided as an ‘electronic AIP’ (eAIP).The eAIP shall allow for displaying on computer screen and printing on paper. In addition, the AIP, AIP amendments and AIP supplements may also be provided on paper.

• (b) The AIP shall include:
• (1) a statement of the competent authority responsible for the air navigation facilities, services or procedures covered by the AIP;
• (2) the general conditions under which the services or facilities are available for use;
• (3) a list of significant differences between the regulations and practices of the Member State and the related ICAO Standards and Recommended Practices (SAPRs) and Procedures;
• (4) the choice made by a Member State in each significant case where an alternative course of action is provided for in the ICAO SARPs and procedures.

• (c) The AIP shall contain information related to, and arranged under, the subject headings listed in Appendix 1.

• (d) The issuing Member State and AIS provider shall be clearly indicated.

• (e) When two or more Member States jointly provide an AIP, they shall be clearly indicated.

• (f) Each AIP shall be self-contained and include a table of contents.

• (g) An AIP shall be organised in three parts (GEN, ENR and AD), sections and subsections, except when the AIP, or a volume of the AIP, is designed to facilitate operational use in- flight, in which case the precise format and arrangement may be left to the discretion of the Member State provided that an adequate table of contents is included.

• (h) Each AIP shall be dated.

• (i) The date, consisting of the day, month (by name), and year, shall be the publication date and/or the effective date (AIRAC) of the information.

• (j) When describing periods of activity, availability or operation, the applicable days and times shall be specified.

• (k) Each AIP issued as a printed volume and each page of an AIP issued in a loose-leaf form shall be annotated to clearly indicate:
• (1) the identity of the AIP;
• (2) the territory covered and its subdivisions, when necessary;
• (3) the identification of the issuing Member State and producing organisation (authority); and
• (4) page numbers/chart titles.

• (l) Any amendment to the printed volume of the AIP shall be made using replacement sheets.

AIS.TR.310 AIP amendments

• (a) Any operationally significant changes to the AIP, in accordance with point AIS.OR.505, shall be issued under AIRAC and clearly identified as such.

• (b) Each AIP amendment shall be allocated a serial number, which shall be consecutive.

• (c) When an AIP amendment is issued, it shall include references to the serial number of the NOTAM which have been incorporated into the amendment.

• (d) The most current update cycles applicable to AIP amendments shall be made publicly available.

• (e) Recourse to hand amendments/annotations shall be kept to a minimum; the normal method of amendment shall be by reissuing or by replacement of pages.

• (f) Each AIP amendment shall:
• (1) include a checklist with the current dates and numbers of each loose-leaf page in the AIP; and
• (2) provide a recapitulation of any outstanding hand amendments.

• (g) New or revised information shall be identified by an annotation against it in the margin.

• (h) Each AIP amendment page, including the cover sheet, shall contain a publication date and, when applicable, an effective date.

• (i) The regular intervals between the AIP amendments shall be specified in Part 1 – General (GEN) of the AIP.

AIS.TR.315 AIP supplements

• (a) The AIP supplement issued in printed form shall be provided by means of distinctive pages.

• (b) The most current update cycles applicable to AIP supplements shall be made publicly available.

• (c) Each AIP supplement shall be allocated a serial number which shall be consecutive and based on the calendar year.

• (d) Whenever an AIP supplement is issued as a replacement of a NOTAM, a reference to the series and number of the NOTAM shall be included.

• (e) A checklist of valid AIP supplements shall be issued at intervals of not more than one month, as part of the checklist of NOTAM and also with distribution as for the AIP supplements.

• (f) Each AIP supplement page shall have a publication date. Each AIRAC AIP supplement page shall have both a publication and an effective date.

AIS.TR.320 Aeronautical information circular (AIC)

• (a) The AIC shall be provided as an electronic document.

• (b) The AIC shall be provided whenever it is desirable to promulgate:
• (1) forecasts of important changes in the air navigation procedures, services and facilities;
• (2) forecasts of implementation of new navigational systems;
• (3) significant information derived from aircraft accident/incident investigation which has a bearing on flight safety;
• (4) information on regulations related to the safeguarding of civil aviation against acts of unlawful interference that jeopardise the security of civil aviation;
• (5) advice on medical matters of special interest to pilots;
• (6) warnings to pilots concerning the avoidance of physical hazards;
• (7) information on the effect of certain weather phenomena on aircraft operations;
• (8) information on new hazards affecting aircraft handling techniques;
• (9) information on regulations related to the carriage of restricted articles by air;
• (10) references to the requirements of national and EU legislation and to the publication of changes therein;
• (11) information on aircrew licensing arrangements;
• (12) information on training of aviation personnel;
• (13) information on the implementation of, or exemption from, requirements in national and EU legislation;
• (14) advice on the use and maintenance of specific types of equipment;
• (15) the actual or planned availability of new or revised editions of aeronautical charts;
• (16) information on the carriage of communication equipment;
• (17) explanatory information related to noise abatement;
• (18) selected airworthiness directives;
• (19) information on changes in NOTAM series or distribution, new editions of AIP or major changes in their content, coverage or format;
• (20) advance information on the snow plan; and
• (21) other information of a similar nature.

• (c) The AIC shall not be used for information that qualifies for inclusion in AIP or NOTAM.

• (d) The snow plan issued in accordance with point AD 1.2.2 of the AIP shall be supplemented by seasonal information to be issued as an AIC well in advance of the beginning of each winter – not less than one month before the normal onset of winter conditions.

• (e) When the AIC is selected by the originating Member State for distribution beyond its territory, it shall have the same distribution as the AIP.

• (f) Each AIC shall be allocated a serial number which shall be consecutive and based on the calendar year.

• (g) In the event that an AIC is provided in more than one series, each series shall be separately identified by a letter.

• (h) A checklist of AIC currently in force shall be issued at least once a year, with distribution as for the AIC.

• (i) A checklist of AIC provided beyond the territory of a Member State shall be included in the NOTAM checklist.

AIS.TR.330 NOTAM

• (a) A NOTAM shall be issued when it is necessary to provide the following information:
• (1) establishment of, closure of, or significant changes in the operation of aerodromes or heliports or runways;
• (2) establishment of, withdrawal of, and significant changes in, the operation of aeronautical services;
• (3) establishment of, withdrawal of, and significant changes in, the operational capability of radio navigation and air-ground communication services;
• (4) unavailability of backup and secondary systems, having a direct operational impact;
• (5) establishment of, withdrawal of, or significant changes to, visual aids;
• (6) interruption of, or return to operation of, major components of aerodrome lighting systems;
• (7) establishment of, withdrawal of, or significant changes to, procedures for air navigation services;
• (8) occurrence or correction of major defects or impediments in the manoeuvring area;
• (9) changes to, and limitations on, the availability of fuel, oil and oxygen;
• (10) major changes to search and rescue (SAR) facilities and services available;
• (11) establishment of, withdrawal of, or return to, operation of hazard beacons marking obstacles to air navigation;
• (12) changes in regulations applicable in the Member State(s) concerned that require immediate action from an operational perspective;
• (13) operational directives requiring immediate action or changes thereto;
• (14) presence of hazards that affect air navigation;
• (15) planned laser emissions, laser displays and search lights if pilots’ night vision is likely to be impaired;
• (16) erecting or removal of, or changes to, obstacles to air navigation in the take-off/climb, missed approach, approach areas as well as on the runway strip;
• (17) establishment or discontinuance of, including activation or deactivation, as applicable, or changes in, the status of prohibited, restricted or danger areas;
• (18) establishment or discontinuance of areas or routes, or portions thereof, where the possibility of interception exists and where the maintenance of guard on the very high frequency (VHF) emergency frequency 121.500 MHz is required;
• (19) allocation, cancellation or change of location indicators;
• (20) changes in aerodrome/heliport rescue and firefighting (RFF) category;
• (21) presence of, removal of, or significant changes in, hazardous conditions due to snow, slush, ice, radioactive material, toxic chemicals, volcanic ash deposition or water on the movement area;
• (22) outbreaks of epidemics necessitating changes in notified requirements for inoculations and quarantine measures;
• (23) forecasts of solar cosmic radiation, where provided;
• (24) an operationally significant change in volcanic activity, the location, date and time of volcanic eruptions and/or the horizontal and vertical extent of a volcanic ash cloud, including direction of movement, flight levels and routes or portions of routes that could be affected;
• (25) (release into the atmosphere of radioactive materials or toxic chemicals following a nuclear or chemical incident, the location, date and time of the incident, the flight levels and routes, or portions thereof, that could be affected, as well as the direction of movement;
• (26) establishment of operations of humanitarian relief missions, together with procedures and/or limitations that affect air navigation;
• (27) implementation of short-term contingency measures in cases of disruption, or partial disruption, of ATS and related supporting services;
• (28) specific loss of integrity of satellite-based navigation systems.
• (29) unavailability of a runway due to runway marking works or, if the equipment used for those works can be removed, a time lag required for making the runway available.’

• (b) A NOTAM shall not be issued to provide any of the following information:
• (1) routine maintenance work on aprons and taxiways that does not affect the safe movement of aircraft;
• (2) temporary obstructions in the vicinity of aerodromes/heliports that do not affect the safe operation of aircraft;
• (3) partial failure of aerodrome/heliport lighting facilities where such failure does not directly affect aircraft operations;
• (4) partial temporary failure of air-ground communications when suitable alternative frequencies are available and are operative;
• (5) lack of apron marshalling services, road traffic closures, limitations and control;
• (6) the unserviceability of location, destination or other instruction signs on the aerodrome movement area;
• (7) parachuting when in uncontrolled airspace under visual flight rules (VFR), or when in controlled airspace at promulgated sites or within danger or prohibited areas;
• (8) training activities performed by ground units;
• (9) unavailability of backup and secondary systems if these do not have an operational impact;
• (10) limitations to airport facilities or general services, with no operational impact;
• (11) national regulations not affecting general aviation;
• (12) announcements or warnings about possible/potential limitations, with no operational impact;
• (13) general reminders on already published information;
• (14) availability of equipment for ground units, without information on the operational impact on airspace and facility users;
• (15) information about laser emissions with no operational impact and about fireworks below the minimum flying heights;
• (16) closure of parts of the movement area in connection with locally coordinated, planned work of duration of less than one hour;
• (17) closure, changes, unavailability in the operation of aerodrome(s)/heliport(s) other than in the aerodrome(s)/heliport(s) operation hours; and
• (18) other non-operational information of a similar temporary nature.

• (c) Except as provided for in points AIS.TR.330(f) and AIS.TR.330(g), each NOTAM shall contain the information in the order shown in the NOTAM format of Appendix 2.

• (d) NOTAM text shall be composed of the significations/uniform abbreviated phraseology assigned to the ICAO NOTAM Code, complemented by ICAO abbreviations, indicators, identifiers, designators, call signs, frequencies, figures and plain language.

• (e) All NOTAM shall be issued in English language. If necessary for domestic users, NOTAM may additionally be issued in national language.

• (f) Information concerning snow, slush, ice, frost, standing water or water associated with snow, slush, ice or frost on the movement area shall be disseminated by means of SNOWTAM and shall contain the information in the order shown in the SNOWTAM format of Appendix 3.

• (g) Information concerning an operationally significant change to volcanic activity, volcanic eruption and/or volcanic ash cloud shall, when reported by means of an ASHTAM, contain the information in the order shown in the ASHTAM format of Appendix 4.

• (h) When errors occur in a NOTAM, a NOTAM with a new number shall be issued to replace the erroneous NOTAM or the erroneous NOTAM shall be cancelled and a new NOTAM shall be issued.

• (i) When a NOTAM is issued that cancels or replaces a previous NOTAM:
• (1) the series and number/year of the previous NOTAM shall be indicated;
• (2) the series, location indicator and subject of both NOTAM shall be the same.

• (j) Only one NOTAM shall be cancelled or replaced by a NOTAM.

• (k) Each NOTAM shall deal with only one subject and one condition of the subject.

• (l) Each NOTAM shall be as brief as possible and compiled so that its meaning is clear without the need to refer to another document.

• (m) A NOTAM containing permanent or temporary information of long duration shall include appropriate references to the AIP or AIP supplement.

• (n) Location indicators included in the text of a NOTAM shall be those contained in ICAO Doc 7910 ‘Location Indicators’. A curtailed form of such indicators shall not be used. Where no ICAO location indicator is assigned to the location, its place name shall be entered in plain language.

• (o) A series identified by a letter and a four-digit number followed by a stroke and a two-digit number for the year shall be allocated to each NOTAM. The four-digit number shall be consecutive and based on the calendar year.

• (p) All NOTAM shall be divided in series based on subject, traffic or location or a combination thereof, depending on end-user needs. NOTAM for aerodromes allowing international air traffic shall be issued in international NOTAM series.

• (q) If NOTAM are issued in both English and national language, the NOTAM series shall be organised so that the national language series are equivalent to the English language series in terms of content and numbering.

• (r) The content and geographical coverage of each NOTAM series shall be stated in detail in the AIP, in point GEN 3.

• (s) A checklist of valid NOTAM shall be regularly provided.

• (t) One checklist NOTAM shall be issued for each series.

• (u) A checklist NOTAM shall also refer to the latest AIP amendments, AIP supplements, data sets and, at least, to distributed AIC.

• (v) A checklist NOTAM shall have the same distribution as the actual message series to which it refers and shall be clearly identified as a checklist.

• (w) Series allocation shall be monitored and, if required, appropriate measures shall be taken to assure that no series reaches the maximum possible number of issued NOTAM before the end of a calendar year.

Chapter 2 – Digital data sets

AIS.TR.335 General— Digital data sets

• (a) A standard for geographic information shall be used as a reference framework.

• (b) A description of each available data set shall be provided in the form of a data product specification.

• (c) A checklist of the available data sets, including their effective and publication dates, shall be made available to users to ensure that current data is being used.

• (d) The checklist of data sets shall be made available through the same distribution mechanism as the one used for the data sets.

AIS.TR.340 Metadata requirements

The minimum metadata for each data set shall include:

• (a) the name of the organisations or entities providing the data set;

• (b) the date and time when the data set was provided;

• (c) the validity of the data set; and

• (d) any limitations on the use of the data set.

AIS.TR.345 AIP data set

• (a) The AIP data set shall include data about the following subjects, including the properties indicated, if applicable: Data subjects Associated properties as a minimum ATS airspace Type, name, lateral limits, vertical limits, class of airspace Special activity airspace Type, name, lateral limits, vertical limits, restriction, activation Route Identifier prefix, flight rules, designator Route segment Navigation specification, start point, end point, track, distance, upper limit, lower limit, minimum en-route altitude (MEA), minimum obstacle clearance altitude (MOCA), direction of cruising level, reverse direction of cruising level, required navigation performance Waypoint – en-route Reporting requirement, identification, location, formation Aerodrome/heliport Location indicator, name, International Air Transport Association (IATA) designator, served city, certification date, certification expiration date, if applicable, control type, field elevation, reference temperature, magnetic variation, airport reference point Runway Designator, nominal length, nominal width, surface type, strength Runway direction Designator, true bearing, threshold, take-off run available (TORA), take-off distance available (TODA), accelerate-stop distance available (ASDA), landing distance available (LDA), rejected TODA (for helicopters) Final approach and take-off area (FATO) Designation, length, width, threshold point Touchdown and lift-off area (TLOF) Designator, centre point, length, width, surface type Radio navigation aid Type identification, name, aerodrome served, hours of operation, magnetic variation, frequency/channel, position, elevation, magnetic bearing, true bearing, zero bearing direction

• (b) When a property is not defined for a particular occurrence of the subjects listed in (a), the AIP data subset shall include an explicit indication: ‘not applicable’.

AIS.TR.350 Terrain and obstacle data – General requirements

The coverage areas for sets of terrain and obstacle data shall be specified as:

• (a) Area 1: the entire territory of a Member State;

• (b) Area 2: within the vicinity of an aerodrome, subdivided as follows:
• (1) Area 2a: a rectangular area around a runway which comprises the runway strip plus any clearway that exists;
• (2) Area 2b: an area extending from the ends of Area 2a in the direction of departure, with a length of 10 km and a splay of 15 % to each side;
• (3) Area 2c: an area extending outside Areas 2a and 2b at a distance of not more than 10 km from the boundary of Area 2a; and
• (4) Area 2d: an area outside Areas 2a, 2b and 2c up to a distance of 45 km from the aerodrome reference point, or to an existing terminal manoeuvring area (TMA) boundary, whichever is nearer;