单项选择题
A.you can stop within your visibility range
B.you can take proper and effective action to avoid collision
C.you are traveling slower than surrounding vessels
D.no wake comes from your vessel
单项选择题 In order for a stand-on vessel to take action in a situation，she must determine that the other vessel（）.
单项选择题 If your vessel is the stand-on vessel in a crossing situation（）.
单项选择题 If necessary to avoid collision or allow more time to（）the situation，a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion．