单项选择题
A.stop your engines
B.sound the danger signal at two-minute intervals
C.hold course and speed until the other vessel is sighted
D.take avoiding action as soon as possible
单项选择题 In determining safe speed，the Rules list all of the following as factors which must be taken into account EXCEPT the（）.
单项选择题 In determining if risk of collision exists the following considerations shall be among（）.
单项选择题 In a crossing situation on open waters，a sailing vessel shall keep out of the way of all the following vessels EXCEPT a vessel（）.