单项选择题
A.gear extending from the side or stern
B.gear that restricts maneuverability
C.less than 50 percent trolling lines
D.None of the above
单项选择题 If a vessel of special construction cannot fully comply with the Rules，her degree of compliance shall be determined by（）.
单项选择题 If the circumstances admit，（）of small alteration of course and speed shall not be taken to avoid collision.
单项选择题 If the circumstances of the case admit，any vessel（）in a narrow channel.