- fathometers
- n. instrument for measuring underwater depth using sound, sonic depth finder
English contemporary dictionary. 2014.
English contemporary dictionary. 2014.
Fishfinder — A fishfinder is a type of fathometer, both being specialized types of echo sounding systems, a type of Active SONAR. ( Sounding is the measurement of water depth, a historical nautical term of very long usage.) The fishfinder uses active sonar to … Wikipedia
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USCGC Valiant (WMEC-621) — is a United States Coast Guard medium endurance cutter. She was laid down February 28, 1966 at American Ship Building Company, Lorain, Ohio and launched January 14, 1967. She was commissioned November 3, 1967 at Galveston, Texas her first… … Wikipedia
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