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  2. Fishfinder - Wikipedia

    en.wikipedia.org/wiki/Fishfinder

    A fishfinder or sounder (Australia) is an instrument used to locate fish underwater by detecting reflected pulses of sound energy, as in sonar. A modern fishfinder displays measurements of reflected sound on a graphical display, allowing an operator to interpret information to locate schools of fish, underwater debris , and the bottom of a body ...

  3. Depth sounding - Wikipedia

    en.wikipedia.org/wiki/Depth_sounding

    Depth gauge – Instrument that indicates depth below a reference surface; Echo sounding – Measuring the depth of water by transmitting sound waves into water and timing the return Multibeam echosounding – Type of sonar used to map the seabed; Fishfinder – Electronic device used in water

  4. Depth gauge - Wikipedia

    en.wikipedia.org/wiki/Depth_gauge

    Depth gauge. US Marine diver with a diving watch and an analog depth gauge. A digital depth gauge combined with a timer and temperature display, also referred to as a "Bottom timer". A depth gauge is an instrument for measuring depth below a vertical reference surface. They include depth gauges for underwater diving and similar applications.

  5. Echo sounding - Wikipedia

    en.wikipedia.org/wiki/Echo_sounding

    Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight, along with knowledge of the speed of sound in water, allows determining ...

  6. Deeper Fishfinder - Wikipedia

    en.wikipedia.org/wiki/Deeper_Fishfinder

    Deeper Fishfinder. Deeper Smart Sonar is a wireless, castable echo-sounder compatible with iOS and Android smartphones and tablets. Wi-Fi connection enabled to maximize both the distance between the sounder and the device holder up to 330 ft / 100 m and the depth range up to 260 ft / 80 m. The scanning frequency allows the device to capture ...

  7. Bathymetry - Wikipedia

    en.wikipedia.org/wiki/Bathymetry

    Bathymetry (/ bəˈθɪmətri /; from Ancient Greek βαθύς (bathús) 'deep' and μέτρον (métron) 'measure') [ 1 ][ 2 ] is the study of underwater depth of ocean floors (seabed topography), lake floors, or river floors. In other words, bathymetry is the underwater equivalent to hypsometry or topography. The first recorded evidence of ...

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