時(shí)間：2011-08-28 15:32來源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次
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. abbreviation: TRA Fr: zone radar de tour tower radar plan A plan containing the rules and procedures applicable in a tower radar area (TRA). . abbreviation: TRP Fr: plan radar de tour TRA Abbreviation for: tower radar area Fr: TRA trace icing An atmospheric condition in which ice becomes perceptible, the rate of accumulation being slightly greater than the rate of sublimation. It is not hazardous, even when de-icing or anti-icing equipment is not utilized, unless encountered for periods of more than 1 hr. Fr: trace de givrage track The projection on the earth’s surface of the path of an aircraft, the direction of which path at any point is usually expressed in degrees from true, magnetic or grid north. Fr: route traffic advisory An advisory issued by airborne collision avoidance system (ACAS)/traffic alert and collision avoidance system (TCAS) to alert pilots to other air traffic that may be in such proximity to the position or intended route of flight of their aircraft as to warrant their attention. . abbreviation: TA Fr: avis de trafic traffic alert and collision avoidance system A type of airborne collision avoidance system (ACAS) based on a family of airborne equipment that functions independently of the ground-based ATC system to detect potential conflicting aircraft that are equipped with secondary surveillance radar (SSR) transponders. There are three different versions: TCAS I provides traffic advisories; TCAS II provides traffic advisories and vertical resolution advisories (RA); and TCAS IV, when developed, will provide traffic advisories and vertical and horizontal RAs. . abbreviation: TCAS .
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