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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相关考题
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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
