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azimuth-stabilized plan position indicator

azimuth-stabilized plan position indicator

[′az·ə·məth ¦sta·bə‚līzd ′plan pə′zish·ən ′in·də‚kād·ər]
(engineering)
A north-upward plan position indicator (PPI), a radarscope, which is stabilized by a gyrocompass so that either true or magnetic north is always at the top of the scope regardless of vehicle orientation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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