fish-finder

fish-finder

also called  Netsonde,  

      in commercial fishing, high-frequency sonar device for locating schools of fish. It transmits sound waves downward and receives echoes from the bottom of the sea, or from intervening schools of fish, also indicating distance from ship to fish. Two different types are used, one of which is a simple “echo sounder” that points directly downward from the ship and indicates the depth of the water as well as the presence of fish. More complex sonars or scanners send signals in all directions, covering a much wider area and providing more extensive information about the location of schools of fish.

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Universalium. 2010.

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Look at other dictionaries:

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  • fish-finder — ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun : a sonic depth finder used to determine the position of schools of fish in the sea …   Useful english dictionary

  • fish finder — 1) a sonar device or echo sounder used to locate fishes and determine water depth 2) a surf fishing rig comprising a pyramid shaped sinker running freely along the line; this allows the bait to be carried by the tide or run by a fish …   Dictionary of ichthyology

  • fish-finder — 1) a sonar device or echo sounder used to locate fishes and determine water depth 2) a surf fishing rig comprising a pyramid shaped sinker running freely along the line; this allows the bait to be carried by the tide or run by a fish …   Dictionary of ichthyology

  • finder — fish finder (a sonar device or echo sounder used to locate fishes) …   Dictionary of ichthyology

  • fish scope — the cathode ray tube element of a fish finder …   Dictionary of ichthyology

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  • Depth finder — A depth finder could mean any of the following: Sonar: use of underwater sound propagation to measure depth Fathometer or fishfinder: a device to locate fish at various water depths Echo sounding: a technique using sound pulses to measure depth… …   Wikipedia

  • 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

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