A precision approach path indicator (PAPI) is a visual aid that provides guidance information to help a pilot acquire and maintain the correct approach (in the vertical plane) to an aerodrome or an airport. It is generally located beside the runway approximately 300 metres beyond the landing threshold of the runway.
Read more about Precision Approach Path Indicator: Background, Design
Famous quotes containing the words precision, approach and/or path:
“How should the world be luckier if this house,
Where passion and precision have been one
Time out of mind, became too ruinous
To breed the lidless eye that loves the sun?”
—William Butler Yeats (1865–1939)
“To approach a city ... as if it were [an] ... architectural problem ... is to make the mistake of attempting to substitute art for life.... The results ... are neither life nor art. They are taxidermy.”
—Jane Jacobs (b. 1916)
“After decades of unappreciated drudgery, American women just don’t do housework any more—that is, beyond the minimum that is required in order to clear a path from the bedroom to the front door so they can get off to work in the mourning.”
—Barbara Ehrenreich (20th century)