单项选择题
One of the factors which affects the circulation of ocean currents is（）.
A.humidity
B.varying densities of water
C.vessel traffic
D.the jet stream
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相关考题
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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 -
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 -
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
