单项选择题
A.it is done in a succession of small course changes
B.It is not done too early
C.It is a large course change
D.the course change is to starboard
单项选择题 Ships carrying 15 or more seafarers and engaged in a voyage of more than three day’s duration shall provide separate hospital accommodation to be used（）.
单项选择题 Which one of the followings is incorrect?（）
单项选择题 In my opinion,the manner is（）that the duty engineer reported the small fire in engine room.