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A four-letter location indicator is assigned by States to aeronautical fixed station, aerodromes, FIR and other aeronautical features for their unique identification in accordance with the formulation and assignment rules supervised by ICAO.
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Designators for Aircraft Operating Agencies, Aeronautical Authorities and Services |
A three-letter designator is assigned by States to Aircraft Operating Agencies, Aeronautical Authorities and Services for use on the international aeronautical telecommunication service under coordination of ICAO.
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Aircraft Type Designators |
A three or four-letter type designator is used to classify aircraft types that are most commonly provided with air traffic services.
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The International Telecommunication Union (ITU), the International Standard Organisation (ISO) and the International Civil Aviation Organisation (ICAO) are publishing codes to identify countries.
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