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Terms for subject Aviation (1895 entries)

angel	Altitude, measured in thousands of feet	Natali­a D
Anti-Aicraft-Artillery	AAA
APG-66	Designator for the radar installed in the F-16
approach clearance	An authorization issued by ATC fora pilot to conduct an instrument approach procedure (IAP) The type of IAP, along with other pertinent information, is provided in the approach clearance when required.
approach control facility	A terminal ATC facility that provides approach control service in a terminal area
approach control service	Air traffic control service for arriving or departing controlled flights
approach control service	ATC service provided by an approach control facility for arriving and departing VFR/IFR aircraft and, on occasion, en route aircraft. At some airports not served by an approach control facility, the air route traffic control center (ARTCC) provides limited approach control service.
approach gate	A rectangular area, 1 mi. wide and 3 mi. long, bisected by the extended centreline of the runway and located so that the inner boundary of the area is at least 5 mi. from the approach end of the runway.
approach mode	The operational condition of certain aircraft navigation guidance equipment that supports flight operations in the final approach and runway regions
approach procedure with vertical guidance	An instrument approach procedure that utilizes lateral and vertical guidance but does not meet the requirements established for precision approach and landing operations
approach sequence	The order in which two or more aircraft are cleared to approach to land at an aerodrome
approach speed	The recommended speed provided in aircraft manuals used by pilots when making an approach to landing. This speed will vary for different segments of an approach as well as for aircraft weight and configuration.
approach UNICOM	An air-ground communications service that can provide approach and landing information to IFR pilots
approach with vertical guidance	An instrument approach procedure that utilizes lateral and vertical guidance but does not meet the requirements established for precision approach and landing operations
approval request	A request that must be made by all aircraft intending flight to a destination airport where flow control restrictions are in effect
apron	That part of an aerodrome, other than the manoeuvring area, intended to accommodate the loading and unloading of passengers and cargo; the refuelling, servicing, maintenance and parking of aircraft; and any movement of aircraft, vehicles and pedestrians engaged in services necessary for such purposes
apron management service	A service provided to regulate the activities and the movement of aircraft and vehicles on an apron
apron traffic	All aircraft, vehicles, equipment and pedestrians using the apron of the aerodrome
AR/NWM	Air Refuel/Nose Wheel steering system
arc	The track over the ground of an aircraft flying at a constant distance from a NAVAID by reference to distance measuring equipment