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
A tide is called diurnal when（）.
Shipboard Emergency Drills must be carried out at least（）on board cargo ship.
According to the relevant regulation, lifeboat should be powered by（）.
The dew point temperature is（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
Bales close to the deckhead should be covered to prevent（）.
In the Northern hemisphere northerly winds may cause temperature（）.
When the wave period and the apparent rolling period are the same（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.