How the echo sounder should be used?

19 Dec '18, 23:33

Dec. 19, 2018, 11:33 p.m.
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The echo sounder should always be used when making a landfall and kept switched on in coastal and pilotage waters. If the echo sounder is fitted with a shallow water alarm, the alarm should be set to an appropriate safe depth to warn of approaching shallow water. (5th edition BPG 4.5)

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19 Dec '18, 23:34

Dec. 19, 2018, 11:34 p.m.
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