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visual glide slope indicator
avia., Canada	indicateur visuel d’alignement de descente (There are four basic types of visual glide slope indicators that are used in Canada: visual approach slope indicator (VASI), abbreviated visual approach slope indicator (AVASI), precision approach path indicator (PAPI), and abbreviated precision approach path indicator (APAPI). The PAPI and APAPI are the present standard. ICAO uses the term VASIS for VGSI. Other systems, such as the T visual approach slope indicator system (T-VASIS) and the abbreviated T visual approach slope indicator system (AT-VASIS) used by ICAO and some Australian and Pacific Islands airports, are expected to be progressively phased out of service)
transp., avia.	indicateur lumineux d'angle d'approche
English thesaurus
visual glide slope indicator
avia., Canada	An aerodrome lighting facility providing vertical visual approach slope guidance to aircraft during the approach to landing by displaying a pattern of red and white light beams that give an indication to pilots of their position in relation to the established approach slope, depending on the combinations of lights that are seen
Visual Glide Slope Indicator
abbr., scottish	VGSI