PAPI explained

A row of lights beside the runway that shows whether you are on the correct approach slope. Two white and two red means on slope; more red means too low, more white means too high. Pilots remember it as "red on red, you're dead; white on white, you're high".

In playlists

• Aerodromes and ground
• Take-off, circuit and landing

Also on

• Glossary: PAPI
• Wiki: Understanding PAPI Lights on an Airport Runway
• Wiki: Page