GM1 ATS.OR.435(a) Aeronautical
fixed service (ground-ground communications) — communication within a flight
information region
ED Decision 2020/008/R
PROCEDURES FOR DIRECT-SPEECH COMMUNICATIONS
An air traffic services provider should develop appropriate procedures for direct-speech communications to permit immediate connections to be made for very urgent calls concerning the safety of aircraft, and the interruption, if necessary, of less urgent calls in progress at the time.
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