The Rules state that vessels may depart from the Rules when（）.

单项选择题Which statement about the Navigation Rules is TRUE?（）.

A.The rules require vessels to comply with Traffic Separation Scheme regulations
B.The rules use the term safe speed
C.The Rules permit a stand-on vessel to take action prior to being in extremis
D.All of the above are correct

单项选择题If a seaplane is not used as a means of transpiration on water but is capable of being used so，it shall（）.

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 （）.

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（）.

A.IMO
B.The owners of the vessel
C.The government
D.The builder

单项选择题If the circumstances admit，（）of small alteration of course and speed shall not be taken to avoid collision.

A.depression
B.oppression
C.succession
D.possession