A.The hull must be clean
B.There must be calm weather – wind 10 knots or less and a calm sea
C.There must be no currents
D.The depth of the water must be at least one and one-half times the draft
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A.make rounds to inspect the ship at appropriate interals
B.take every precaution to prevent pollution of the environment by the ship
C.enter, in the bell book, all important events affecting the ship
D.offer assistance to ships or person in distress
A.deadweight tons
B.measurement tons
C.displacement tons
D.TEU
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Full details of all lights and fog signals are shown on（）.
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