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Also available:
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echo sounder
ech·o sound·er
(
plural
ech·o sound·ers
)
noun
Definition:
navigation device:
a device used to ascertain water depth or to locate underwater objects by measuring the time taken for emitted sound waves to return from either the bottom or the object
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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