单项选择题
A.be regarded as a vessel not under command
B.be regarded as a vessel underway
C.be regarded as a vessel
D.be regarded as a sailing vessel
单项选择题 If a vessel is engaged in fishing according to the definitions in the Rules，it will have （）.
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.