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Terms for subject Aviation (1801 entries)

automatic direction finder	An aircraft radio navigation system that senses and indicates the direction to a LF/MF non-directional beacon (NDB) ground transmitter. Direction is indicated to the pilot as a magnetic bearing or as a relative bearing to the longitudinal axis of the aircraft depending on the type of indicator installed in the aircraft. In certain applications, such as military, ADF operations may be based on airborne and ground transmitters in the VHF/UHF spectrum.
automatic direction-finding equipment	An aircraft radio navigation system that senses and indicates the direction to a LF/MF non-directional beacon (NDB) ground transmitter. Direction is indicated to the pilot as a magnetic bearing or as a relative bearing to the longitudinal axis of the aircraft depending on the type of indicator installed in the aircraft. In certain applications, such as military, ADF operations may be based on airborne and ground transmitters in the VHF/UHF spectrum.
automatic fixed ELT	An ELT that is permanently attached to an aircraft
automatic portable ELT	An ELT that is rigidly attached to an aircraft but readily removable from the aircraft after a crash
automatic radio compass	An aircraft radio navigation system that senses and indicates the direction to a LF/MF non-directional beacon (NDB) ground transmitter. Direction is indicated to the pilot as a magnetic bearing or as a relative bearing to the longitudinal axis of the aircraft depending on the type of indicator installed in the aircraft. In certain applications, such as military, ADF operations may be based on airborne and ground transmitters in the VHF/UHF spectrum.
automatic terminal information service	The provision, throughout the day or a specified portion of the day, of current, routine information to arriving and departing aircraft by means of continuous and repetitive recorded broadcasts
automatically deployable ELT	An ELT that is rigidly attached to an aircraft and deployed automatically in response to a crash. Manual deployment is also provided.
autonomous intercept	Intercepts initiated by aircrew when no target information is being received from command and control sources
autorotation	A rotorcraft flight condition in which the lifting rotor is driven entirely by action of the air when the rotorcraft is in motion. • spoken expression: auto
autorotation to touchdown	An expression used by a helicopter pilot to indicate that he or she will be landing without applying power to the rotor
autorotational landing	An expression used by a helicopter pilot to indicate that he or she will be landing without applying power to the rotor
autorotative landing	An expression used by a helicopter pilot to indicate that he or she will be landing without applying power to the rotor
av	avionics
average arrival interval	The average number of minutes of longitudinal spacing required between arriving aircraft landing at an airport, based on the acceptance rate of the runway or runways
avi	avionics
aviation occurrence	Any accident or incident associated with the operation of an aircraft, or any situation or condition that could, if left unattended, induce an accident or incident
aviation system block upgrade	ASBUs	Michae­lBurov
aviation weather service	A service provided by the National Weather Service (NWS) and the Federal Aviation Administration (FAA) which collects and disseminates pertinent weather information for pilots, aircraft operators, and ATC. Available aviation weather reports and forecasts are displayed at each NWS office and FAA FSS.
av	avionics
avi	avionics