时间：2011-08-28 15:32来源：蓝天飞行翻译 作者：航空 点击：次
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. see also: alternate aerodrome Fr: aérodrome de dégagement à destination destination unit The unit whose area of responsibility (AOR) encompasses the destination aerodrome. Fr: unité de destination DETRESFA ICAO: Abbreviation for: distress phase Fr: DETRESFA deviation (1) A departure from a current clearance, such as an off-course manoeuvre, to avoid weather or turbulence. Fr: déviation (2) The angular difference between magnetic and compass headings. Fr: déviation DF Abbreviation for: direction finder Fr: DF DF approach procedure U.S.: 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 cloud-breaking procedure An emergency procedure provided by an ATS unit with DF capability to an aircraft for a descent through clouds, provided that the pilot declares an emergency or accepts the service offered and no other course of action is available. Fr: procédure de percée DF DF fix The geographical location of an aircraft obtained by one or more DF. Fr: repère radiogoniométrique 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. . also called: DF steer Fr: guidage radiogoniométrique DF station Other expression for: radio direction-finding station DF steer Other expression for: DF guidance DH Abbreviation for: decision height Fr: DH 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. . also called: direct flight Fr: vol direct directed bright light A lighting system, other than laser light, designed to project a bright light into space. Fr: lumière dirigée à haute intensité direct flight Other expression for: direct direction finder Receiving equipment, complete with antennas and associated circuits, used for direction finding. . abbreviation: DF Fr: radiogoniomètre direction-finding station Other expression for: radio direction-finding station direct controller-pilot communications Communications between a controller and a pilot without resort to a relay through another unit. . abbreviation: DCPC Fr: communications directes contr.leur-pilote 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. |
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