PAPI stands for which instrument?

• A. Precision approach radar
• B. Precision approach path indicator
• C. Precipitation static
• D. Parallels

Answer: (B)

PAPI is a visual glide-path indicator built into the runway approach area. It stands for Precision Approach Path Indicator. This four-light system gives you an immediate color cue to judge your vertical position on approach. When you’re on the desired glide path, the light colors typically show a specific pattern (often two white and two red from the pilot’s perspective). If you see more whites, you’re high; more reds means you’re low. It’s a lighting aid, not radar or weather-related equipment, which is why the other options don’t fit. This tool helps you maintain the proper descent angle consistently without relying solely on instruments.