sound scattering layer

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• sound scattering layer — any layer or object which scatters sound in water. Sonar devices can be used to detect fish schools by recording sound scattering layers …   Dictionary of ichthyology

• scattering layer — scattering layer, a layer of plankton or other organisms in the ocean that reflects and scatters sound waves …   Useful english dictionary

• Deep scattering layer — The deep scattering layer, sometimes referred to as The Sound Scattering Layer ; is the name given to a layer in the ocean consisting of a variety of marine animals. It was discovered through the use of sonar, as ships found a layer that… …   Wikipedia

• deep-scattering layer — ▪ oceanography       horizontal zone of living organisms, usually schools of fish, occurring below the surface in many ocean areas, so called because the layer scatters or reflects sound waves, causing echoes in depth sounders. Originally… …   Universalium

• deep scattering layer — n. any of the stratified zones in the ocean which reflect sound during echo sounding, usually composed of marine organisms which migrate vertically from c. 250 to 800 m ( c. 820 to 2,625 ft) …   English World dictionary

• sonic scattering — sound scattering layer …   Dictionary of ichthyology

• scatteringlayer — scattering layer n. A concentrated layer of organisms in the ocean that reflects and scatters sound waves, as from sonar. * * * …   Universalium

• Underwater acoustics — The field of underwater acoustics is closely related to a number of other fields of acoustic study, including sonar, transduction, acoustic signal processing, acoustical oceanography, bioacoustics, and physical acoustics.HistoryUnderwater sound… …   Wikipedia

• Pelagic fish — A school of large pelagic predator fish (giant trevally) sizing up a school of small pelagic prey fish (anchovies) Pelagic fish live near the surface or in the water column of coastal, ocean and lake waters, but not on the bottom of the sea or… …   Wikipedia

• Schooner Etak — The two masted, gaff rigged auxiliary schooner Etak (later Electric Light , Vega , USS Juniata , Te Vega ; now Deva ) was designed by New York naval architects Cox Stevens in 1929 for American businessman Walter Graeme Ladd and his wife,… …   Wikipedia

• Spinner Dolphin — Taxobox name = Spinner DolphinMSW3 Cetacea|id=14300091] image caption = image2 caption = Size comparison against an average human status = DD status system = iucn3.1 status ref =IUCN2008|assessors=Hammond, P.S., Bearzi, G., Bjørge, A., Forney, K …   Wikipedia