單項(xiàng)選擇題A proper look-out shall be maintained().

A.only at night
B.only during restricted visibility
C.at night and during restricted visibility
D.at all times


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1.單項(xiàng)選擇題A proper look-out must be kept().

A.only in fog
B.only between the hours of sunset and sunrise
C.only when entering and leaving port
D.at all times

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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