sonic depth sounder
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depth sounder — /ˈdɛpθ saʊndə/ (say depth sownduh) noun a device for estimating the depth of water beneath a vessel by emitting sonic waves and measuring the time it takes for their echoes to return from the sea floor. Also, depth finder …
depth finder — ▪ measurement device also called echo sounder device used on ships to determine the depth of water by measuring the time it takes a sound (sonic pulse) produced just below the water surface to return, or echo, from the bottom of the body… … Universalium
echo sounding — noun determining the location of something by measuring the time it takes for an echo to return from it • Syn: ↑echolocation • Hypernyms: ↑localization, ↑localisation, ↑location, ↑locating, ↑fix * * * noun … Useful english dictionary
Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) … Wikipedia
sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… … Universalium
History of research ships — The research ship had origins in the early voyages of exploration. By the time of James Cook s Endeavour , the essentials of what today we would call a research ship are clearly apparent. In 1766, the Royal Society hired Cook to travel to the… … Wikipedia
Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios … Wikipedia
