单选题If your vessel is equipped with inflatable liferafts，how should they be maintained?（）AHave your crew check them annuallyBThey do not need any maintenanceCHave them sent ashore to an approved maintenance facility annuallyDHave them serviced by the shipyard annually
单选题
If your vessel is equipped with inflatable liferafts，how should they be maintained?（）
A
Have your crew check them annually
B
They do not need any maintenance
C
Have them sent ashore to an approved maintenance facility annually
D
Have them serviced by the shipyard annually
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