instrument landing system
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English
Noun
instrument landing system (plural instrument landing systems) (abbreviated as ILS)
- (aviation) A collection of radio navigation aids (always including a localizer and glideslope, and often one to three marker beacons as well) used by pilots for approach guidance to a specific airport runway, especially when visibility is limited.
Coordinate terms
- VHF omnidirectional range (VOR)
- precision approach landing indicator (PAPI)
- approach lighting system (ALS)