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Terms for subject Aviation (1801 entries)

delta sierra	Dog Shit, meaning "bad"
Department of National Defence	The federal authority responsible for military aviation
departure control	A function of an approach control facility providing ATC service for departing IFR and, under certain conditions, VFR aircraft
departure controller	A duty controller assigned to a departure control position
departure time	The time an aircraft becomes airborne
designated unit	A unit that serves as a communications link into the NAV CANADA system for the dissemination of information and that monitors or supports the day-to-day operation of a community aerodrome radio station (CARS) The designated unit may have one or more CARS reporting to it.
destination alternate aerodrome	An alternate aerodrome specified in the flight plan (FP) to which an aircraft may proceed should it become either impossible or inadvisable to land at the aerodrome of intended landing
destination unit	The unit whose area of responsibility (AOR) encompasses the destination aerodrome
deviation	A departure from a current clearance, such as an off-course manoeuvre, to avoid weather or turbulence
deviation	The angular difference between magnetic and compass headings
DF approach procedure	A procedure used under emergency conditions where another instrument approach procedure (IAP) cannot be executed. DF guidance for an instrument approach is given by ATC facilities with DF capability.
DF fix	The geographical location of an aircraft obtained by one or more DF
DF guidance	Headings provided to aircraft by facilities equipped with direction-finding equipment. These headings, if followed, will lead the aircraft to a predetermined point, such as the radio direction-finding station or an airport. DF guidance is given to aircraft in distress or to other aircraft that request the service.
DF station	A radio station intended to determine only the direction of other stations by means of transmissions from the latter
DF steer	Headings provided to aircraft by facilities equipped with direction-finding equipment. These headings, if followed, will lead the aircraft to a predetermined point, such as the radio direction-finding station or an airport. DF guidance is given to aircraft in distress or to other aircraft that request the service.
DH	Decision Height	kate p­nz
dial-up RCO	A standard RCO equipped with a dial-up unit to connect the pilot with an FIC via a commercial telephone line
dial-up remote communications outlet	A standard RCO equipped with a dial-up unit to connect the pilot with an FIC via a commercial telephone line
dim	diameter
diamond X	A missile-mode HUD indicator