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Terms for subject Aviation (1801 entries)

altitude readout value	The altitude figures currently displayed in an altitude readout
altitude reservation	An airspace of defined dimensions within controlled airspace, reserved for the use of a civil or military agency during a specified period. An altitude reservation may be confined to a fixed area (stationary) or moving in relation to the aircraft that operate within it (moving)
altitude reservation service	The service provided by the altitude reservation East (Gander) and the altitude reservation West (Edmonton) in coordination with area control centres (ACC) in providing reserved altitude for specified air operations in controlled airspace, and in providing information concerning these reservations and military activity areas in controlled and uncontrolled airspace
altitude reservation service East	Central coordinating agencies of the NAV CANADA altitude reservation service for eastern Canada
altitude reservation service West	Central coordinating agencies of the NAV CANADA altitude reservation service for western Canada
altitude reservation specialist	An employee in the area control centre (ACC) assigned responsibility for processing requests for altitude reservations
altitude restriction	A restriction to an altitude or altitudes imposed on a flight to ensure that separation criteria are met
altitude restriction	An altitude or altitudes, stated in the order flown, which are to be maintained until reaching [s/c] a specific point or time. Altitude restrictions may be issued by ATC due to traffic, terrain, or other airspace considerations.
American designation for Air-to-Ground Missiles	AGM
AMIS section	A section established within an area control centre (ACC) to provide aircraft movement information service (AMIS) to air defence units
AMRAAM Engagement Order Number	EON
AMRAAM time to active	TTA
AMRAAM time to intercept	TTI
An optically-guided A-G missile	AGM-65
Anti-Aicraft-Artillery	AAA
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.