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elements in ICAO Annex 11. Guidance: Where the preparation of messages involves recording speech using a microphone, care should be taken to ensure that any background noise does not degrade the quality of the recording. Where the preparation is done automatically, using either synthesised or pre-recorded spoken words or phrases, care should be taken to ensure that the quality and readability of the recording is equivalent to that achieved by manual recording.
6.6  Transmission of Messages
6.6.1  Voice-ATIS VHF Transmitter
Guidance: CAP 670 Part C Section 1 COM 02 'VHF Aeronautical Radio Stations' contains requirements for all radio equipment including Voice-ATIS VHF Transmitters and VHF Transmitters used for ACARS and VDL Mode 2 data link communications.
6.6.2  Voice-ATIS CVOR/DVOR Transmitter
Guidance: CAP 670 Part C Section 2 NAV 04 'Engineering Requirements for Conventional and Doppler VHF Omni-Directional Range (CVOR/DVOR) Beacons' includes the option of providing Voice-ATIS by using the speech modulation input to the transmitter.
The Designated Operational Coverage and frequency assignment terms and conditions must be consistent with both the CVOR/DVOR and Voice-ATIS operational requirements. Radio coverage problems may be found if the CVOR/DVOR is not located on or near the aerodrome providing the Voice-ATIS.
Where the CVOR/DVOR beacon is not the direct responsibility of the aerodrome ATS Provider providing the Voice-ATIS, then a service level agreement or some other arrangement might be necessary to ensure compliance with operational requirements and to cover aspects such as maintenance.
6.6.3  D-ATIS VHF Ground Station Network / Satellite
Guidance: CAP 670 Part C Section 1 COM 04 'ATC Datalinks' covers the provision of D-ATIS by Air Traffic Service Providers. The ATIS may be delivered to aircraft by means of a VHF ground station network and/or earth stations of the mobile satellite service operated by Data Link Communications Service Providers.
If any of the VHF ground stations are located within the U.K. they will require ANO approval and CAP 670 Part C Section 1 COM 02 'VHF Aeronautical Radio Stations' applies.
6.6.4  Voice-ATIS Telephone Information Service
Guidance: Access to the Voice-ATIS may be provided via a PSTN/PBX telephone information service as an additional service to aviation and other users. There is no requirement to record the telephone service.
7  Broadcast of Auto METAR
7.1  Broadcast of Auto METAR, utilising an Automatic Terminal Information Service (ATIS) frequency, shall be in conformity with ICAO Annex 3 and shall be approved for use only at aerodromes where an ATIS facility has been approved and when the ATC Watch is closed. The Designated Operational Coverage of the ATIS frequency shall be valid for the Auto METAR broadcast.
7.2  The weather report (METAR) shall be prefixed with the word ‘AUTO’ and only the METAR information shall be included in the broadcast.
7.3  Approval to permit aerodrome weather to be broadcast when the aerodrome is effectively closed shall be subject to a safety case assessment. Where an approval is granted the broadcast should state that the aerodrome is closed except to the specific aircraft operation that gave rise to the approval.
Example: xxxxx (Name of Aerodrome) AERODROME IS CLOSED EXCEPT FOR AUTHORISED EMERGENCY SERVICES OPERATORS. AUTO METAR ETC
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COM 05 Appendix - ICAO Annex 11 ATIS Message Elements

CAP 670 Air Traffic Services Safety Requirements

Message Elements  Footnote Arrival & Departure Arrival Departure 
(a) name of aerodrome  .  .  . 
(b) arrival and/or departure indicator  .  .  . 
(c) contract type, if communication is via D-ATIS  .  .  . 
(d) designator  .  .  . 
(e) time of observation, if appropriate  .  .  . 
　
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