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DS99 Speed log Navigator



Using the Doppler shift between the transmitted and received underwater reflected waves of sound, the Doppler log measures the ship's relative speed to the seabed and the accumulated distance traveled. The Doppler log has high accuracy, good sensitivity, and can detect the longitudinal and transverse speeds of the vessel. It is particularly suitable for providing precise dynamic data of the ship's longitudinal and transverse movement in narrow channels, entering and leaving ports, and approaching or departing from docks.
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