時(shí)間：2011-09-15 17:20來源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次
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transition altitude (TA) altitude in the vicinity of an aerodrome at or below which the vertical position of an aircraft is controlled by reference to altitude, i.e. with the aerodrome QNH set on its altimeter. Above transition altitude QNE is set and flight levels used. Also transition level (TL) at which a descending aircraft changes from FL to QNH. trend Met forecast for the next two hours, added to some METARs. TSO Technical Standard Order. A standard established by the U.S. FAA for quality control in avionics, instruments and other airborne equipment. If it complies, equipment is said to be 'TSO'd' and is more expensive than similar non-TSO's equipment. TTAF/E total time airframe/engine TTSN total time since new TVOR terminal VOR. A low-powered VOR located at or near an airport and used as an approach aid. TWR Tower (aerodrome control tower) TWY taxiway Tx transmitter tyro Can be used as an r/t call prefix by inexperienced pilots in distress or urgency situations to ensure they are not passed instructions beyond their capabilities. U UAS University Air Squadron UDF UHF direction finding UFN until further notice UHF ultra-high frequency. Radio frequencies in the 300-3,000 MHz band UHMRA Upper Heyford Mandatory Radio Area UIR Upper Information Region, covering the same geographic areas as a FIR, but extending vertically upwards from 24,500 feet, within which certain additional operational rules apply. Also UIS, Upper Information Service. Unicom privately-operated advisory A/G radio service at uncontrolled airfields (USA). UNL unlimited u/s unserviceable (i.e not working) when applied to an aircraft or its equipment. UTC Co-ordinated Universal Time, formerly Greenwich Mean Time (see also Zulu). V |
