Two sensors are installed on the ship – one in the forward section and one approx. below the accommodation. The frequency ranges for the sensor are in the interval from 28 to 210 kHz and the measuring accuracy is in the order of 2.5% of the measured depth, Litton (1998).

The echo sounder is used in confined waters for navigational purposes, for which the echo sounder frequency is set to 50 kHz. At this frequency the sea bed detection level is around 90-150 m depending on sea water salinity and temperature. Therefore, no water depths are detected above this level.

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