Precision approach path indicator: Difference between revisions

Revision as of 19:16, 27 January 2009

Revision as of 19:39, 27 January 2009

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The '''Precision Approach Path Indicator (PAPI)''' is a light system positioned beside the [[runway]] that consists of two, three, or four boxes of lights that provide a visual indication of an aircraft's (fixed wing or rotor wing) position on the [[glidepath]] for the associated runway. The [[Federal Aviation Administration|FAA]] standard for the PAPI is the same as the [[ICAO]]'s standard [[VASI|Visual Approach Slope Indicator]].

The PAPI is usually located on the left,right or bothright sidesside of the runway (at 90˚ to the

runway centre line which are typically spaced at 9 metres apart)(many runways have it on both sides aswell.)

Units are identical and can be seen up to five miles during the day and twenty miles at night. It has two or four lights installed in a single row instead of far and near bars that would be characteristic of Visual Approach Slope Indicator (VASI).