precision approach path indicator, PAPI
system of lights on the side of an airport runway threshold that provides visual descent guidance information during final approach, what generally located on the left-hand side of the runway approximately 300 meters beyond the landing threshold of the runway, lennuvälja maandumisraja kõrval paiknev pilootidele mõeldud visuaalne mõõte-/abivahend maandumise lihtsustamiseks, mis paikneb tavaliselt maandumisraja algusest umbes 300 meetri kaugusel
