A precision approach path indicator (PAPI) is a system of lights on the side of an airport runway threshold that provides visual descent guidance information during final approach.

Apr 10, 2025 · The Precision Approach Path Indicator (PAPI) uses light units similar to the VASI, but are installed in a single row of either two or four light units. These lights are visible from about 5 miles …

Nov 13, 2025 · The PAPI system is the current standard Visual Glide Slope Indicator (VGSI) consisting of four light boxes arranged perpendicular to the edge of the runway. It projects a pattern of red and …

Oct 17, 2024 · Learn about the main differences between VASI and PAPI lights for runway landings. Discover how these visual guidance systems help you stay on the correct glide path, and why each …

The Avlite LED Series 3 PAPI is a highly efficient Precision Approach Path Indicator. It uses LEDs as a light source to reduce maintenance, lower power consumption, and increase reliability, safety and …

Our Series 3 PAPI meets both FAA and ICAO requirements in the same compact, lightweight version. Patented LED optics achieve lowest power consumption, highest intensity, and sharpest red/white …

Dec 20, 2025 · PAPI lights help pilots maintain the correct glide slope for landing. They display red and white lights to indicate whether the aircraft on the correct path. PAPI lights are a modern upgrade …

PAPI (pronounced “PAH-pee”) lights are a set of lights mounted next to the touchdown zone. The most common installation usually consists of four lights, each of which appears either red or white …

Oct 2, 2024 · PAPI lights are a set of four lights, red and white, on the runway's left side. They show pilots how close they are to the right landing angle. This helps pilots adjust their descent. PAPI lights …

Apr 29, 2025 · PAPI lights serve as a continuous reference point for pilots to verify their approach angle to a runway. Designed to be highly visible, these lights display an immediate visual representation of …