单项选择题
Any alteration of course and／or speed to avoid collision shall，if the circumstances of the case admit，（）to another vessel observing visually or by radar.
A.be large enough to be readily apparent B.be a succession of small alterations C.be with due regard to the power and speed of the vessel D.leave sufficient room for the other vessel to take action
单项选择题 All of the following constitute special circumstances EXCEPT（）.
单项选择题 All of the following are practices of good seamanship EXCEPT（）.
单项选择题 A vessel restricted in her ability to maneuver is one which（）.
