UMS are mainly unattended overnight and during this time （） should have control of the main engine.<br>A:the chief engineer<br>B:the engineer on cabin watch<br>C:the bridge officer on watch<br>D:the master

UMS are mainly unattended overnight and during this time （） should have control of the main engine.
A:the chief engineer
B:the engineer on cabin watch
C:the bridge officer on watch
D:the master

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