Plain English Meaning

An approach that gives the pilot a radio signal showing whether they are left or right of the runway centerline, but does not show whether they are too high or too low. The pilot handles the descent themselves using the published altitudes on the chart.

Full Definition

A non-precision instrument approach that uses the localizer component of an Instrument Landing System (ILS) to provide lateral guidance to a runway, but does not provide electronic vertical (glideslope) guidance. The pilot follows the localizer course to align with the runway centerline and descends in steps to published until reaching the (), from which the runway must be seen to to land.