单选题If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?（）APump only if the discharge is led to a shore tank or bargeBPump only during the hours of darknessCPump only on the outgoing tideDPump only as much as is necessary
单选题
If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?（）
A
Pump only if the discharge is led to a shore tank or barge
B
Pump only during the hours of darkness
C
Pump only on the outgoing tide
D
Pump only as much as is necessary
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