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[5] ICAO Manual of Air Traffic Services Data Link Applications (Doc 9694).
[6] CAP 746, Meteorological Observations at Aerodromes.
Part 2 Requirements
4  Safety Objective
The Automatic Terminal Information Service (ATIS) equipment and systems shall provide complete, identified, accurate and uncorrupted voice / data communication of meteorological and other aeronautical information (1004).
5  General Requirements
5.1  International Standards
5.1.1  The equipment, systems, services and facilities shall comply with the applicable international standards, recommended practices and procedures for air navigation services in Annex 11 [1], Annex 10 [2] and Annex 3 [3] to the Convention on International Civil Aviation (236).
5.2  Interface to Voice / Data Recording Equipment
The equipment and systems used in the provision of a Voice-ATIS or D-ATIS shall provide all the necessary signals and information to the Voice / Data Recording Equipment in compliance with Article 206 of the Air Navigation Order (238).
NOTE:  EUROCAE has published the document ED-93, ‘Minimum Operational Performance Specification for CNS/ATM Recording Systems’, which includes the ground recording of data-link communications.
5.3  Manual of Air Traffic Services Part 2
5.3.1  Appropriate material relating to the operation of the ATIS shall be written for inclusion in the Manual of Air Traffic Services (MATS) Part 2 (239).
NOTE:  See CAP 670 Part B Section 2 ATC 02 'ATC Documentation' for the requirements and details on the format of MATS Part 2.
6  Specific Requirements
6.1  Voice-ATIS and D-ATIS
6.1.1  The ATIS message shall relate to a single aerodrome (240).
6.1.2  The ATIS message shall be updated immediately a significant change occurs (241).
6.1.3  The preparation and dissemination of the ATIS message shall be the responsibility of the Air Traffic Service Provider (242).
6.1.4  Individual ATIS messages shall be identified by a letter designator from the ICAO spelling alphabet assigned consecutively in alphabetical order (243).
6.1.5  ATIS shall only be broadcast when the ATC Watch is operational (2327). However, units may be approved to make use of the ATIS frequency to broadcast Auto METAR when the ATC Watch is closed, where the Unit meets the requirements of COM 06 paragraph 7 (Broadcast of Auto METAR).
6.2  Voice-ATIS
6.2.1  In the UK, ATIS shall only be provided in association with an air traffic control service (2053).
6.2.2  Voice-ATIS shall be provided at aerodromes where there is an operational requirement to reduce ATC VHF air-ground communications workload (244).
NOTE:  The provision of a Voice-ATIS may be limited by the availability of discrete VHF frequencies which are in short supply.
6.2.3  Voice-ATIS broadcasts shall comprise (245): a) One broadcast for arriving aircraft or b) One broadcast for departing aircraft or c) One broadcast for arriving and departing aircraft or d) Two separate broadcasts for arriving and departing aircraft where the combined
broadcast would be excessively long.
6.2.4  Voice-ATIS shall be provided on a discrete VHF frequency whenever practicable (246).
Guidance: As the VHF spectrum is congested and there is a shortage of available radio frequency assignments, any application for the use of a VHF frequency assignment will require a justification of the operational requirements.
6.2.5  When a discrete VHF frequency is not available, Voice-ATIS may be provided on the most appropriate terminal navigation aid (247).
Guidance: CVOR or DVOR facilities are considered to be appropriate navigation aids subject to evidence from the Air Traffic Service Provider of the Voice-ATIS, justifying the choice of navigation aid, taking into account the Designated Operational Coverage, quality of the voice transmissions and any other appropriate factors. The Air Traffic Service Provider of a CVOR or DVOR navigation aid used for Voice-ATIS would be responsible for demonstrating compliance with NAV 04.
　
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