单项选择题

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（）.

A.white
B.green
C.red
D.yellow

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A vessel engaged in fishing during the day would show（）.

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 vessel enagaged in fishing，and at anchor，shall show（）.

A.an anchor light
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D.None of the above

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A vessel crossing a river on the Western Rivers has the right of way over（）.

A.vessels ascending the river
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D.None of the above