Practice question

What is the visual indication on a Precision Approach Path Indicator (PAPI) system when an aircraft is exactly on the correct approach glide slope?

  1. Two red lights on the left and two white lights on the right.
  2. Three red lights and one white light.
  3. Three white lights and one red light.
  4. Four green lights.

Answer: A — Two red lights on the left and two white lights on the right.

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