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:
“We are often struck by the force and precision of style to which hard-working men, unpracticed in writing, easily attain when required to make the effort. As if plainness and vigor and sincerity, the ornaments of style, were better learned on the farm and in the workshop than in the schools. The sentences written by such rude hands are nervous and tough, like hardened thongs, the sinews of the deer, or the roots of the pine.”
—Henry David Thoreau (1817–1862)
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—Policy statement, 1944, of the Youth League of the African National Congress. pt. 2, ch. 4, Fatima Meer, Higher than Hope (1988)
“Tired,
she looked up the path
her lover would take
as far as her eyes could see.
On the roads,
traffic ceased
at the end of day
as night slid over the sky.
The traveller’s pained wife
took a single step towards home,
said, “Could he not have come at this instant?”
and quickly craning her neck around,
looked up the path again.”
—Amaru (c. seventh century A.D.)