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
What is it called when it is possible to ignite the vapour above the oil?（）
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Full details of all lights and fog signals are shown on（）.
Which of the following is not an operation mode of AIS?（）
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 dew point temperature is（）.
（）is on the panel of radar.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
It is dangerous for vessels without the operational radar（）the estuary.