What does the acronym "PAPI" mean in aviation?

The acronym "PAPI" stands for Precision Approach Path Indicator. This system is essential in aviation as it provides visual guidance to pilots during their approach to landing. PAPI consists of a series of lights located beside the runway, which offers critical information on whether the aircraft is on the correct glide path. By observing the colors of these lights (usually red and white), pilots can determine if they need to adjust their altitude to maintain the ideal approach angle for landing.

The PAPI system enhances safety by helping ensure that aircraft land safely and efficiently, especially in conditions where visibility might be compromised. Its design is intended to be intuitive, allowing pilots to make real-time adjustments based on the visual feedback provided by the lights. This makes it a vital tool within the broader framework of aviation navigational aids.