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Location Indicators , is a specialized publication used to list the four-letter codes (e.g., KJFK, EGLL) assigned to geographical locations worldwide for aeronautical telecommunications and air traffic services.
This includes indicators for:
, titled Location Indicators , is a primary aviation reference manual that lists the four-letter codes (e.g., KJFK, EGLL) used to identify geographical locations such as aerodromes and flight information centers worldwide. Core Purpose & Contents doc 7910 pdf