What is the service volume of the localizer?

The correct service volume of a localizer is established to ensure that aircraft receive accurate navigation guidance during their approach to the runway. The localizer operates within a specific altitude range, which is critical for maintaining signal integrity as an aircraft descends towards the airport. The service volume for the localizer extends from the earth's surface up to 4500 feet above the elevation of the antenna, providing adequate coverage for approaching aircraft.

This range is designed to accommodate not only typical approach altitudes but also to ensure safety margins and better signal fidelity under varying atmospheric conditions. This makes it crucial for maintaining precision in the lateral navigation guidance offered by the localizer during instrument approaches. Other altitude specifications do not align with the established standards for localizer service volumes.