单项选择题

A vessel constrained by her draft may display（）.

A.three all-round red lights
B.two 225°red lights
C.three all-round blue lights
D.two 225°blue lights

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热门试题

单项选择题A towing light is（）.

A.shown below the sternlight
B.white in color
C.displayed at the masthead
D.a yellow light having the same characteristics as the stern light

单项选择题A towing light is（）.

A.shown at the bow
B.white in color
C.shown in addition to the sternlight
D.an all-round light

单项选择题A towing light（）.

A.flashes at regular intervals of 50-70 flashes per minute
B.is yellow in color
C.shows an unbroken light over an arc of the horizon of not less than 180°nor more than 225°
D.All of the above

单项选择题A signal of one prolonged，one short，one prolonged，and one short blast，in that order is given by a vessel（）.

A.engaged on pilotage duty
B.in distress
C.at anchor
D.being overtaken in a narrow channel

单项选择题A signal of intent must be sounded in international waters by（）.

A.a vessel meeting another head-on
B.a vessel overtaking another in a narrow channel
C.a vessel crossing the course of another
D.the give-way vessel in a crossing situation