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  2. Bathymetry - Wikipedia

    en.wikipedia.org/wiki/Bathymetry

    The beams update many times per second (typically 0.1–50 Hz depending on water depth), allowing faster boat speed while maintaining 100% coverage of the seafloor. Attitude sensors allow for the correction of the boat's roll and pitch on the ocean surface, and a gyrocompass provides accurate heading information to correct for vessel yaw. (Most ...

  3. Satellite-derived bathymetry - Wikipedia

    en.wikipedia.org/wiki/Satellite-derived_bathymetry

    Satellite-derived bathymetry (SDB) is the calculation of shallow water depth from active or passive satellite imaging sensors. The technology requires a sensor (hardware) and relevant algorithms (software) to derive bathymetric measurements from the data recorded by the sensor.

  4. CTD (instrument) - Wikipedia

    en.wikipedia.org/wiki/CTD_(instrument)

    Sensors commonly scan at a rate of 24 Hz. Depth measurements are derived from measurement of hydrostatic pressure, and salinity is measured from electrical conductivity. [1] Sensors are arranged inside a metal or resin housing, the material used for the housing determining the depth to which the CTD can be lowered.

  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 . 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 the distance ...

  6. Acoustic Doppler current profiler - Wikipedia

    en.wikipedia.org/wiki/Acoustic_Doppler_Current...

    A temperature sensor is used to estimate the sound velocity at the instrument position using the seawater equation of state, and uses this to estimate scale the frequency shift to water velocities. This procedure assumes that the salinity has a preconfigured constant value. Finally, the results are saved to internal memory or output online to ...

  7. Bathymetric chart - Wikipedia

    en.wikipedia.org/wiki/Bathymetric_chart

    The beams update many times per second (typically 0.1–50 Hz depending on water depth), allowing faster boat speed while maintaining 100% coverage of the seafloor. Attitude sensors allow for the correction of the boat's roll and pitch on the ocean surface, and a gyrocompass provides accurate heading information to correct for vessel yaw. (Most ...

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