单项选择题

What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）

A.Enforcement of smoking restrictions
B.Restricting vessels from coming alongside the barge
C.Insuring that a combustible gas indicator is aboard
D.Protecting cargo hose with chafing gear

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货物装卸货作业

What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）