ICAO DOC 4444 Air Traffic Management - Procedures for Air Navigation Services (PANS-ATM) Ed 15
These procedures are complementary to the Standards and Recommended Practices contained in Annex 2 and Annex 11 and specify, in greater detail than in the Standards and Recommended Practices, the actual procedures to be applied by air traffic services units in providing the various air traffic services to air traffic.
Including Amendment No. 1-6 .
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