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visual approach slope indicator
avia. 目视进近坡度指示器; 目视进场下滑道指示器; 目视进场斜率指示器设在跑道两侧的标灯; 目视进场进近下滑道指示器; 目视进场 进近下滑道指示器 (在进近到跑道时，为提供目视下降引导信息而安置的灯光系统。日间，这些灯光在3〜5 mile 内可见，夜间，超过20 mile 亦可见)
el. 目视进场坡度显示器
 English thesaurus
visual approach slope indicator
avia., Canada A visual glide slope indicator VGSI consisting of four light units normally situated on the left side of the runway in the form of two wing bars, referred to as the upwind and downwind wing bars, and indicating that 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. (VGSI)
Visual Approach Slope Indicator
abbr., scottish VASI
visual-approach slope indicator
: 9 phrases in 2 subjects
Aviation8
Technology1

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