ultrasonic depth finder
ultrasonic depth finder
[¦əl·trə′sän·ik ′depth ‚fīn·dər] (engineering)
A direct-reading instrument which employs frequencies above the audible range to determine the depth of water; it measures the time interval between the emission of an ultrasonic signal and the return of its echo from the bottom.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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