ILS Approach

The ILS system provides both Vertical and Horizontal guidance to a specific runway. The ILS system is used to execute a precision instrument approach procedure or precision approach. Most navigation systems approved for Enroute and terminal operations under IFR, such as VOR, NDB, and GPS, may also be approved to conduct instrument approach procedures. The most common system in use in the United States is the ILS. An ILS (instrument landing system) operates as a ground-based instrument approach system, using a combination of radio signals, during IMC conditions, this system will guide airplanes to land during low ceilings or reduced visibility due to fog, rain, or blowing snow.

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