In dictionaries:
Instrument landing system localizer
An instrument landing system localizer, or simply localizer (LOC, or LLZ prior to 2007), is a system of horizontal guidance in the instrument landing system, which is used to guide aircraft along the axis of the runway.
Localizer performance with vertical guidance
the highest precision GPS (SBAS enabled) aviation instrument approach procedures currently available without specialized aircrew training requirements, such as required navigation performance.
more...