ICAO Document 8585


ICAO Document 8585 is a publication by the International civil aviation organization (ICAO) that provides the designators for aircraft operating agencies, aeronautical authorities, and services. These designators are used in air traffic control, flight planning, and other aviation operations to identify different entities in a standardized manner. The document includes three-letter designators for airlines and other aircraft operating agencies, two-letter designators for aeronautical authorities and services, and telephony designators for aircraft operating agencies. The designators are used globally to ensure uniformity and clarity in aviation communication. The document is updated regularly to include new designators and remove those that are no longer in use. It is an essential resource for air traffic controllers, pilots, airlines, and other aviation professionals to ensure accurate and efficient communication and coordination in the global aviation system.


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