单项选择题
A head-on situation at night is one in which you see（）.
A.one sidelight of a vessel ahead of you
B.one sidelight and a masthead light of a vessel ahead of you
C.one sidelight，a masthead light，and a range light of a vessel ahead of you
D.both sidelights of a vessel dead ahead of you
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相关考题
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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 -
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
