- depthfinder
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depth finder
n.
An instrument used to measure the depth of water, especially by radar or ultrasound.
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Universalium. 2010.
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Universalium. 2010.
Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… … Wikipedia