单项选择题

With UMS, when the engine room is unwatched （） will control the main engine.

A.the bridge officer on watch
B.the chief engineer
C.the duty engineer
D.the duty motorman

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单项选择题

A.open
B.open front type
C.live front type
D.None of the above

单项选择题

A.alternator
B.glass thermometer
C.burdon tube
D.piezoelectric pressure transducer

单项选择题

A.the system is manned manually
B.the system is situated remotely from the operator
C.the system is controlled automatically
D.all the above