Air traffic control service for arriving or departing controlled flights. A unit established to provide air traffic control service to controlled flights arriving at, or departing from, one or more aerodromes. (ICAO 9713- Approach control office)
Source ICAO ECCAIRS 4.2.6 Data Definition Standard http://www.icao.int/anb/aig/Taxonomy/R4CDANSServices.pdf
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