plan position indicator


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plan position indicator

[′plan pə′zish·ən ′in·də‚kād·ər]
(electronics)
A radarscope display in which echoes from various targets appear as bright spots at the same locations as they would on a circular map of the area being scanned, the radar antenna being at the center of the map. Abbreviated PPI. Also known as P display.

plan position indicator (PPI)

plan position indicator (PPI)click for a larger image
A cathode-ray tube (CRT) on which radar returns are displayed. The returns on the PPI are oriented relative to the transmitter.