A.one black ball
B.two cones with bases together
C.a cone，apex downward
D.two cones，apexes together
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A.an anchor light
B.sidelights and a sternlight
C.three lights in a vertical line，the highest and lowest being red，and the middle being white
D.None of the above
A.vessels ascending the river
B.vessels descending the river
C.all vessels ascending and descending the river
D.None of the above
最新試題
A vessel engaged in fishing shall keep out of the way of a vessel（）.
A vessel being towed astern shall show at night（）.
A vessel engaged in fishing must display a light in the direction of any gear that extends outward more than 150 meters. The color of this light is（）.
The Rules state that vessels may depart from the Rules when（）.
If the circumstances of the case admit，any vessel（）in a narrow channel.