Azimuth-stabilised P.P.I.

From International Dictionary of Marine Aids to Navigation
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A plan-position indicator in which the true north on the display remains fixed in spite of the movement of the ship.

Note: The term is extended to stabilisation with respect to magnetic north.

Reference: B.S. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)