单项选择题
A.a watch which is kept with lower standard
B.a watch which is kept when the ship isnt sailing
C.a watch which is kept when the ship is sailing
D.a watch which is kept when the ship is in a restricted visibility area
单项选择题 When the engine room is put in standby condition, the engineer in charge of the watch need not to（）
单项选择题 The responsibilities of the engineer officer in charge of the watch do not include （）
单项选择题 When the chief engineer is in the machinery spaces, the officer in charge of the engineering watch shall（）