What is the purpose of the Localizer in an airfield?

The purpose of the Localizer is to guide aircraft during approach. It is a crucial component of the Instrument Landing System (ILS), which assists pilots in aligning their aircraft with the runway centerline during the final stages of landing. The Localizer transmits a radio signal that provides horizontal guidance, enabling pilots to maintain the proper flight path as they approach the runway.

This system is vital for ensuring a safe and precise landing, especially in conditions with reduced visibility. By providing accurate lateral alignment information, the Localizer helps decrease the workload on pilots and improves overall safety in approaching the runway. The other choices, such as providing weather updates, monitoring airport taxiing, and measuring aircraft altitude, do not align with the specific guidance function of the Localizer.