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Line 1: {{redirect\|VASI\|other uses\|Vasi (disambiguation){{!}}Vasi}} {{Refimprove\|date=November 2012}} The '''visual approach slope indicator''' ('''VASI''') is a system of [[Electric light\|lights]]s on the side of an airport [[runway]] threshold that provides visual [[descent (aircraft)\|descent]] guidance information during [[final approach]]. These lights may be visible from up to {{convert\|8\|km\|mi}} during the day and up to {{convert\|32\|km\|mi}} or more at night. [[Image:Vasi-1.JPG\|thumb\|Standard visual approach slope indicator (circled in red)]]

Visual approach slope indicator: Difference between revisions