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echo sounding definition

echo sounding

the determining of depth of water by means of a device (echo sounder) that measures the time required for a sound wave to be reflected from the bottom: a similar process (echo ranging) is used to measure the distance to an underwater object

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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