instrument landing system

Noun
(abbreviated as ILS)


 * 1)  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)

Related terms

 * instrument guidance system (IGS)
 * microwave landing system (MLS)