Private Pilot Private Exam

What indicates a slightly high glide slope from a precision approach path indicator?

1. Two white lights and two red lights

2. Three white lights and one red light

3. One white light and three red lights

4. Four red lights

The correct answer is: Three white lights and one red light

A slightly high glide slope from a precision approach path indicator is represented by three white lights and one red light. The configuration of lights on a Precision Approach Path Indicator (PAPI) provides clear visual guidance for pilots during landing. In this system, the colors of the lights indicate the aircraft's vertical position relative to the ideal glide slope. When three lights are white, it indicates that the aircraft is high on the glide slope, while one red light signals that the aircraft is slightly below the ideal path. Hence, three white lights and one red light represent a situation where the pilot is slightly above the desired glide slope, prompting the need to descend slightly to align with the optimal landing approach. Understanding PAPI lights is crucial for pilots to ensure a safe and accurate landing, as they provide real-time visual feedback during final approach.