Functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off must be supervised by（）.<br>A:any certificated tankerman<br>B:the master of the vessel<br>C:the officer of the watch<br>D:the person designated as person in charge

Functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off must be supervised by（）.
A:any certificated tankerman
B:the master of the vessel
C:the officer of the watch
D:the person designated as person in charge

出自：海船船员证

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