A.actual depth of water
B.actual depth of water below keel
C.average depth from waterline to hard bottom
D.average depth of water to soft bottom
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A.prevent them from falling when the vessel rolls
B.protect personnel from electrical shock
C.increase their operating efficiency
D.prevent unauthorized personnal from operating them
A.once
B.whether
C.previous
D.just
A.the union representative
B.the person aboat whom the entry concerns
C.no one else
D.one other crew member
A.logbook
B.Bell book
C.oil record book
D.compass error book
A.safty straps from the overhead
B.built in seats
C.releasing hooks at each end
D.water stabilizing pockets
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Berthing means bringing a vessel to her berth until（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
The ISM code is part of（）.
When the wave period and the apparent rolling period are the same（）.
The helm command PORT TWENTY means（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Shipboard Emergency Drills must be carried out at least（）on board cargo ship.
Full details of all lights and fog signals are shown on（）.
What is it called when it is possible to ignite the vapour above the oil?（）
Before any loading takes place any signs of the previous cargo should do（）.