What do the sixth and seventh letters in the addressee indicator signify?

The sixth and seventh letters, each taken from the series A to Z, denote the national and/or international distribution list(s) to be used by the receiving AFS centre.

What regulation defines the provision of ATM/ANS services related to NOTAM distribution?

ATM /ANS - Provision of Services (Regulation (EU) 2017/373)

How are addressee indicators constituted for designated addressees in the NOTAM distribution system?

Addressee indicators consist of eight letters: the first two letters are the location indicator for the AFS communication centre, the third and fourth letters are 'ZZ', the fifth letter differentiates between NOTAM ('N'), SNOWTAM ('S'), and ASHTAM ('V'), the sixth and seventh letters denote the national and/or international distribution list(s), and the eighth letter is the filler letter 'X'.

GM1 AIS.TR.400(a) Distribution services

Q: What is the purpose of the predetermined distribution system for incoming NOTAM according to GM1 AIS.TR.400(a)?

The predetermined distribution system channels incoming NOTAM (including SNOWTAM and ASHTAM) through the aeronautical fixed service (AFS) directly to designated addressees predetermined by the receiving country, while concurrently routing them to the international NOTAM office for checking and control purposes.

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ED Decision 2020/008/R

NOTAM

(a) The predetermined distribution system provides for incoming NOTAM (including SNOWTAM and ASHTAM) to be channelled through the aeronautical fixed service (AFS) directly to designated addressees predetermined by the receiving country concerned while concurrently being routed to the international NOTAM office for checking and control purposes.

(b) The addressee indicators for those designated addressees are constituted as follows:

(1) First and second letters

The first two letters of the location indicator for the AFS communication centre associated with the relevant international NOTAM office of the receiving country.

(2) Third and fourth letters

The letters ‘ZZ’ indicating a requirement for special distribution.

(3) Fifth letter

The fifth letter differentiating between NOTAM (letter ‘N’), SNOWTAM (letter ‘S’), and ASHTAM (letter ‘V’).

(4) Sixth and seventh letters

The sixth and seventh letters, each taken from the series A to Z, denoting the national and/or international distribution list(s) to be used by the receiving AFS centre.

The fifth, sixth and seventh letters replace the three-letter designator YNY which, in the normal distribution system, denotes an international NOTAM office.

(5) Eighth letter

The eighth position letter shall be the filler letter ‘X’ to complete the eight-letter addressee indicator.

(c) Member States are to inform the States from which they receive NOTAM of the sixth and seventh letters to be used under different circumstances to ensure proper routing.

Details

Source-Title: GM1 AIS.TR.400(a) Distribution services View latest amendments

Erulesid: ERULES-1963177438-17540 Compare versions

Domain: Air traffic management/Air navigation services

Applicabilitydate: 27 January, 2022

Entryintoforcedate: 3 July, 2020

Regulatorysource: ED Decision 2020/008/R Navigate

Regulatorysubject: Part-AIS

Typeofcontent: GM to IR (Guidance material to implementing rule)

Parentir: AIS.TR.400 Distribution services

Origin: EASA

Category: EAR