单项选择题
The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can be immediately be placed in the manual mode of operation when notified that the ship is （）
A.at anchor B.at unsheltered anchorage C.in congested waters D.in an open road-stead
单项选择题 Who is in charge of the auxiliary boilers?（）
单项选择题 Who is in charge of the auxiliary engines?（）
单项选择题 Who is in charge of the main engine?（）
