Visual Approach Slope Indicator System

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Link Semantic Value
Term Visual Approach Slope Indicator System
Status


Mandatory for


Contexts


Categories
Synonyms


Related entries


Broader term

airport lighting

Narrower term


Abbreviation

  • VASIS

Definition

An airport lighting facility providing vertical approach slope guidance to aircraft during approach to landing.

Definition Source

  • AIFDD

Note

A directional pattern of high intensity red and white focused light beams which indicate to the pilot that they are either: 'on path' if they see red/white; 'above path' if white/white; and 'below path' if red/red.