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Terms for subject Aviation (1801 entries)

dash	dashboard
data link ATIS	An automatic terminal information service (ATIS) provided by data link
data link initiation capability	The function of a communication system which provides the necessary information to enable data link communications between ATS ground and aircraft systems and includes features such as log-on, update, contact and ground forward. It is the access mode for the provision of automatic dependent surveillance (ADS) and controller-pilot data link communications (CPDLC)
data link VOLMET	In-flight meteorological information provided by data link
date-time group	A combination of the date and time in a single six-figure group. When used in the text of a NOTAM, it is composed often figures, e.g. 9501191200. The first two digits indicate the year; the second two, the month; the third two, the day; and the last four, the hour and the minutes.
day	Canada (CARs) Other expression for: daylight daylight The period of time during any day that begins with the morning civil twilight and ends with the evening civil twilight
DC power supply system	direct current power supply system
dead reckoning navigation	The estimating or determining of position by advancing an earlier known position by the application of direction, time and speed data
death dot	CCIP HUD mode indicator showing where the bombs will hit
decision altitude	A specified altitude in the precision approach or approach with vertical guidance at which a missed approach must be initiated if the required visual reference to continue the approach to land has not been established
decision height	A specified height in the precision approach or approach with vertical guidance at which a missed approach must be initiated if the required visual reference to continue the approach to land has not been established
defence visual flight rules	Rules applicable to flights within an air defence identification zone (ADIZ) conducted under VFR
defensive maneuvering	Maneuvers designed to negate the attack/ordnance of a threat
defensive spiral	A descending, accelerating dive using high G and continuous roll to negate an attack and gain lateral separation
degree Celsius	deg c
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