单项选择题
A.The power-driven vessel must keep out of the way of the sailing vessel
B.A special circumstance situation exists
C.The sailing vessel must keep out of the way of the power- driven vessel
D.The vessel which has the other vessel to the right must keep out of the way
单项选择题 Which one of two crossing power-driven vessels has the right of way in a fog（）.
单项选择题 Which one of the following rules is not regarding two power-driven vessels meeting end or nearly end on so as to involve risk of collision（）.
单项选择题 Which display indicates a vessel conducting mineclearance operations（）.