单项选择题Vessels,()support vessels,should not enter the safety zone of a deepwater port unless clearance has been obtained from the Vessel Traffic Supervisor.

A.besides
B.excepted
C.otherwise
D.other than


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1.单项选择题The Rules state that vessels may depart from the Rules when().

A.there are other vessels in the vicinity
B.operating in a traffic separation scheme
C.engaged in a situation involving more than two vessels
D.necessary to avoid immediate danger

2.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

3.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

4.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

7.单项选择题If the circumstances of the case admit,any vessel()in a narrow channel.

A.shall have the liberty to anchor
B.shall avoid anchoring
C.shall moor to a buoy when necessary
D.shall keep anchoring

9.单项选择题In a crossing situation,the stand-on vessel should normally().

A.take action to cross ahead of the other vessel
B.take action to pass astern of the other vessel
C.maintain course and speed
D.change course and increase speed

10.单项选择题In complying with the Rules,of what must the mariner take due regard?().

A.Limited backing power of his vessel
B.Radar information about nearby vessels
C.The occupation of the other vessel,if known
D.All of the above