Multiple choice

Two white and two red lights on a PAPI indicate that the airplane is ____________ the glide slope.

  1. slightly above

  2. slightly below

  3. on

  4. very much below

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The PAPI (Precision Approach Path Indicator) uses a 4-light system to show glide slope position. When an aircraft is exactly on the 3-degree glide path, the pilot sees two white lights on the left and two red lights on the right. This is the correct indication for being on the glide slope.