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also called: automatic radio compass (ARC) and automatic direction-finding equipment

Fr: radiogoniomètre automatique
automatic direction-finding equipment Other expression for: automatic direction finder (ADF)
. abbreviation: ADF
automatic fixed ELT
An ELT that is permanently attached to an aircraft.
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abbreviation: ELT(AF)

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see also: emergency locator transmitter (ELT)

Fr: ELT automatique fixe
automatic portable ELT
An ELT that is rigidly attached to an aircraft but readily removable from the aircraft after a crash.
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abbreviation: ELT(AP)

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see also: emergency locator transmitter (ELT)

Fr: ELT automatique portative
automatic radio compass Other expression for: automatic direction finder (ADF)
. abbreviation: ARC
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.
. abbreviation: ATIS
Fr: service automatique d’information de région terminale
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
Fr: autorotation
autorotational landing Other expression for: autorotation to touchdown
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.
. also called: autorotational landing, autorotative landing and touchdown autorotation
Fr: atterrissage en autorotation
autorotative landing Other expression for: autorotation to touchdown
AVASIS Abbreviation for: abbreviated visual approach slope indicator system Fr: AVASIS
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.
. abbreviation: AAI
Fr: intervalle moyen d’arrivée
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. Fr: fait aéronautique
aviation weather briefing service A service provided by an FSS that gives meteorological information through the process of selecting, interpreting, elaborating and adapting relevant charts, reports and documents to support the safe, regular and efficient conduct of aviation operations.
. abbreviation: AWBS
Fr: service d’exposé météorologique à l’aviation
aviation weather information service A service provided by an FSS that gives factual weather information obtained from actual weather reports, official weather forecasts and approved graphic or weather chart products. It does not involve the interpretation of this information.