PAPI and VASI lighting systems are used to aid pilots in maintaining what during approach and landing?

PAPI and VASI lighting systems are used to aid pilots in maintaining what during approach and landing?

• A. Indicating wind direction
• B. Indicating airspeed
• C. Maintaining the correct glidepath
• D. Indicating surface friction

Answer: (C)

The main idea is to provide a visual cue of your vertical position relative to the intended descent path during approach and landing. PAPI and VASI light systems translate your angle of descent into a simple light pattern you can see from the cockpit as you approach the runway. When you’re on the correct glidepath, the lights show the designated on-path pattern; if you’re above the path, the pattern changes to indicate you need to descend more, and if you’re below the path, it indicates you must descend less or adjust pitch to return to the path. This visual guidance helps you stabilize the approach and aim for a safe touchdown. They aren’t indicators of wind direction, airspeed, or surface friction.

The main idea is to provide a visual cue of your vertical position relative to the intended descent path during approach and landing. PAPI and VASI light systems translate your angle of descent into a simple light pattern you can see from the cockpit as you approach the runway. When you’re on the correct glidepath, the lights show the designated on-path pattern; if you’re above the path, the pattern changes to indicate you need to descend more, and if you’re below the path, it indicates you must descend less or adjust pitch to return to the path. This visual guidance helps you stabilize the approach and aim for a safe touchdown. They aren’t indicators of wind direction, airspeed, or surface friction.