時間：2011-08-28 15:32來源：藍天飛行翻譯 作者：航空 點擊：次
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. abbreviation: VTA Fr: carte de région terminale VFR VGSI Abbreviation for: visual glide slope indicators . see: visual approach slope indicator systems Fr: VGSI VHF Abbreviation for: very high frequency Fr: VHF VHF direction-finding service A service by which directional assistance is provided to VFR aircraft, as described in the “Communications” (COM) and “Rules of the Air and Air Traffic Services” (RAC) sections of the Transport Canada Aeronautical Information Manual (TC AIM). . abbreviation: VDF service Fr: service de radiogoniométrie VHF VHF omnidirectional range station A ground-based electronic NAVAID that transmits very high frequency navigation signals 360° in azimuth. . also called: VOR station Fr: station de radiophare omnidirectionnel VHF VIS Abbreviation for: visibility Fr: VIS visibility The distance at which prominent unlighted objects may be identified by day and prominent lighted objects may be identified by night. . abbreviation: VIS Fr: visibilité visual approach An approach wherein an aircraft on an IFR flight plan (FP), operating in visual meteorological conditions (VMC) under the control of ATC and having ATC authorization, may proceed to the airport of destination. Fr: approche visuelle visual approach slope indicator system An approach slope indicator system consisting of four light units situated on the left side of the runway in the form of two wing bars referred to as the upwind and downwind wing bars. The aircraft is on slope if the upwind bar shows red and the downwind bar shows white, too high if both bars show white, and too low if both bars show red. Some aerodromes serving large aircraft have three-bar VASIS, which provide two visual glide paths (GP) to the same runway. The VASIS can be situated so as to provide three types of eye-to-wheel height (EWH): V1 (10 ft), V2 (25 ft) and V3 (25 ft and 45 ft). . abbreviation: VASIS .
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