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Terms for subject Aviation (1801 entries)

dipl	diplomatic
dipl	diplomatic
direct	A straight-line flight between two NAVAIDs, fixes, points, or any combination thereof. When used by pilots in describing off-airway routes, points defining direct route segments become compulsory reporting points unless the aircraft is under radar contact.
DC power supply system	direct current power supply system
direct flight	A straight-line flight between two NAVAIDs, fixes, points, or any combination thereof. When used by pilots in describing off-airway routes, points defining direct route segments become compulsory reporting points unless the aircraft is under radar contact.
Direct User Access Terminal System	A computer-based system provided by a vendor to pilots or other operational personnel. DUATS supplies the aviation weather and NOTAM information necessary for pre-flight planning via computer terminals or personal computers owned by the vendor or users.
directed bright light	A lighting system, other than laser light, designed to project a bright light into space
direction finder	Receiving equipment, complete with antennas and associated circuits, used for direction finding
direction-finding station	A radio station intended to determine only the direction of other stations by means of transmissions from the latter
Directive to intercept and identify the target (also aircrew ID accomplished, followed by type aircraft)	ID
discrete code	A specific mode 3/A code assigned to one aircraft only
discrete SSR code	A specific mode 3/A code assigned to one aircraft only
displaced threshold	A threshold not located at the end of a runway
distance measuring equipment	Airborne and ground equipment used to measure the slant range distance from a DME NAVAID in nautical miles
distance of turn anticipation	The distance measured parallel to the course from the earliest position of the intermediate approach waypoint (IWP) at which the turn will be commenced
distress	Condition of being threatened by serious and/or imminent danger and of requiring immediate assistance. The spoken word for distress is MAYDAY, and it is pronounced three times.
distress phase	A phase that begins when (a) the fuel on board is considered to be exhausted or to be insufficient to enable the aircraft to land safely; (b) information is received that indicates that the operating efficiency of the aircraft has been impaired to the extent that a forced landing is likely; or (c) information is received that the aircraft is about to make, or has made, a forced landing
distress phase	A situation wherein there is reasonable certainty that an aircraft and its occupants are threatened by grave and imminent danger or require immediate assistance
dive brake	Movable aerodynamic devices on aircraft that reduce indicated airspeed
DLZ	Dynamic launch zone