Which navigation system provides information up to 25 miles from the runway at altitudes up to 2000 feet?

The localizer is a key component of the Instrument Landing System (ILS) that provides horizontal guidance to an aircraft as it approaches a runway. It operates by transmitting a radio signal that helps pilots determine their position relative to the centerline of the runway. The range of the localizer typically extends up to 25 miles from the runway, and it is effective at altitudes up to 2000 feet, making it essential for ensuring precise alignment during an approach to landing.

The functionality of the localizer ensures that aircraft can stay aligned with the runway, especially in low visibility conditions. By using the localizer, pilots are able to make accurate adjustments as they descend, which is critical for safe landings. This capability is why the localizer is especially referenced for approach procedures and is a vital aspect of navigation during the final stages of flight.

While other systems like the VOR and TACAN also provide navigation assistance, they are designed for different purposes and have different ranges and capabilities, particularly in terms of their specific functions and how they assist with approaches to landing.