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  2. Towed array sonar - Wikipedia

    en.wikipedia.org/wiki/Towed_array_sonar

    The DUBV 43C towed array sonar of La Motte-Picquet.. A towed array sonar is a system of hydrophones towed behind a submarine or a surface ship on a cable. Trailing the hydrophones behind the vessel, on a cable that can be kilometers long, keeps the array's sensors away from the ship's own noise sources, greatly improving its signal-to-noise ratio, and hence the effectiveness of detecting and ...

  3. Metal detector - Wikipedia

    en.wikipedia.org/wiki/Metal_detector

    A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...

  4. Underwater acoustics - Wikipedia

    en.wikipedia.org/wiki/Underwater_acoustics

    Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries. The water may be in the ocean, a lake, a river or a tank. Typical frequencies associated with underwater acoustics are between 10 ...

  5. Unearth Your Next Hobby With These Expert-Recommended Metal ...

    www.aol.com/best-metal-detectors-uncover-buried...

    Scavenge for gold, coins, and other buried treasure with these metal detectors, including models from Garrett, Nokta, and Minelab.

  6. IceCube Neutrino Observatory - Wikipedia

    en.wikipedia.org/wiki/IceCube_Neutrino_Observatory

    The IceCube Neutrino Observatory (or simply IceCube) is a neutrino observatory developed by the University of Wisconsin–Madison and constructed at the Amundsen–Scott South Pole Station in Antarctica. [1] The project is a recognized CERN experiment (RE10). [2] [3] Its thousands of sensors are located under the Antarctic ice, distributed over ...

  7. Underwater cutting and welding - Wikipedia

    en.wikipedia.org/wiki/Underwater_cutting_and_welding

    Shielded metal arc cutting cuts the metal by melting it with the intense heat of the arc, without burning it with oxygen, which works better for carbon steel plate less than 6mm thick and for non-ferrous and corrosion resistant metals of any thickness.: Ch. 1 Underwater shielded metal arc cutting is a simple process.

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