instrument approach

A landing approach made without visual reference to the ground by the use of aircraft instruments and ground-based electronic or communications systems or devices. An aircraft making such an approach should be flying in accordance with an IFR (instrument flight rules) flight plan. An approach carried out with the help of systems such as ILS (instrument landing system), MLS (microwave landing system), GCA (ground-controlled approach), VOR (very high frequency omnidirectional radio range), TACAN (tactical air navigation), LOC (localize), and GPS (global positioning system) would be categorized as an instrument approach. See ground-control approach.

Aviation dictionary. 2014.

Look at other dictionaries:

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  • Instrument landing system — The Instrument Landing System (ILS) is a ground based instrument approach system that provides precision guidance to an aircraft approaching a runway, using a combination of radio signals and, in many cases, high intensity lighting arrays to… …   Wikipedia

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