instrument landing system

English

Noun

instrument landing system (plural instrument landing systems) (abbreviated as ILS)

  1. (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)
  • instrument guidance system (IGS)
  • microwave landing system (MLS)
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