"Localizer" redirects here. For other uses, see Localization.
An instrument landing system localizer, or simply localizer (LOC,[1] or LLZ prior to 2007[2]), is a system of horizontal guidance in the instrument landing system, which is used to guide aircraft along the axis of the runway.
^ICAO Abbreviations and Codes (DOC 8400) (Report) (9th ed.). International Civil Aviation Organization. 2016.
^ICAO Abbreviations and Codes (DOC 8400) (Report) (6th ed.). International Civil Aviation Organization. 2004.