Instrument landing system (ILS)

Definitions

• An electronic system that provides both horizontal and vertical guidance to a specific runway, used to execute a precision instrument approach procedure.
• A precision instrument approach system that normally consists of the following electronic components and visual aids: localizer, glide slope, outer marker, middle marker, and approach lights.
• An electronic system that provides both horizontal and vertical guidance to a specific runway, used to execute a precision instrument approach procedure. Instrument meteorological conditions (IMC). Meteorological conditions expressed in terms of visibility, distance from clouds, and ceiling less than the minimums specified for visual meteorological conditions. Flight without visual reference to the horizon.

References

• Instrument Flying Handbook, Federal Aviation Administration, 2014
• Instrument Procedures Handbook, Federal Aviation Administration, 2017
• Weight-Shift Control Aircraft Flying Handbook, Federal Aviation Administration, 2008