A.The unit is working properly
B.The face mask is not sealed properly
C.The air bottle needs to be refilled
D.The air supply hose has a leak
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A.put back in service if some CO2 remains
B.hydrostatically tested
C.retagged
D.recharged
A.prior to
B.during
C.in the period of
D.afterwards
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
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
最新試題
The ISM code is part of（）.
When steering by autopilot,how often should the steering be checked?（）
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
In the Northern hemisphere northerly winds may cause temperature（）.
The loading of the ship must be done in accordance with（）.
Full details of all lights and fog signals are shown on（）.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
According to the relevant regulation, lifeboat should be powered by（）.