What does a pilot use to determine their position relative to the runway?

Pilots use approach lights as a visual aid to help determine their position relative to the runway during the landing phase of flight. Approach lights are a series of illuminated signals that extend from the runway threshold into the approach path. They provide crucial visual references that indicate the correct approach angle and help the pilot gauge their altitude and distance from the runway.

When flying towards the runway, pilots can assess their alignment with the runway centerline and make necessary adjustments to ensure a safe landing. This visual cue is essential, particularly in low visibility conditions where traditional navigation aids may not be as effective.

Weather radar, ground speed indicators, and vertical speed indicators, while useful in various flight parameters, do not provide direct visual guidance to the runway's alignment during the final descent and approach.