A.oil from flowing out of the tank vent
B.air from entering the tank vent
C.vapors from leaving the tank vent
D.flames on deck from entering the tank vent
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A.any certificated tankerman
B.the master of the vessel
C.the officer of the watch
D.the person designated as person in charge
A.to the top to expel all vapors from the tanks
B.to the top so the operator is certain how much fuel he has aboard
C.with only sufficient fuel for the planned trip so excess gasoline is not carried
D.to near the top with some space allowed for gasoline expansion
A.deep tanks/lower holds
B.lower holds/tweendecks
C.tweendecks/deep tanks
D.deep tanks/tweendecks
A.doggers
B.fidleys
C.freeing ports
D.swash ports
A.With gooseneck vents
B.With warning signs
C.With flame screens
D.With pressure-vacuum relife valves
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The helm command PORT TWENTY means（）.
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（）is on the panel of radar.
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