APAPI - abbreviated PAPI
2 lights. On G/S should be one red, one white. Too low = both red, too high = both white.
Not as "good" as PAPI because you don't get the "slightly off" G/S indication... (eg PAPI 3 white one red is "slightly high")
HTH
Last edited by rustle; 20th January 2003 at 16:54.