dead-reckoning tracer

dead-reckoning tracer

[¦ded ′rek·ən·iŋ ‚trā·sər]
(navigation)
A mechanical device used to produce a continuous plot of all ships within range of a ship's radar.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.