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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（）is where the crew eat their meals.
Bales close to the deckhead should be covered to prevent（）.
When steering by autopilot,how often should the steering be checked?（）
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
Manoeuvring information can not be obtained from（）.
The mean draft of a ship is the draft（）.
ECDIS must be able to perform all of the following EXCEPT（）.
The loading of the ship must be done in accordance with（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
Which of the following shall not the officers in charge of the navigational watch do?（）