單項選擇題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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1.單項選擇題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

2.單項選擇題A vessel enagaged in fishing，and at anchor，shall show（）.

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

3.單項選擇題A vessel crossing a river on the Western Rivers has the right of way over（）.

A.vessels ascending the river
B.vessels descending the river
C.all vessels ascending and descending the river
D.None of the above

4.單項選擇題A vessel continually lists to one side and has a normal rolling period. Which statement is TRUE?（）.

A.The vessel has negative GM
B.The center of gravity is on the centerline
C.The list can be corrected by reducing KM
D.The vessel has asymmetrical weight distribution

5.單項選擇題A vessel constrained by her draught may，in addition to the lights prescribed for power-driven vessels in Rule 23，exhibit where they can best be seen（）or a cylinder.

A.two all-round red lights in a vertical line
B.three all-round red lights in a vertical line
C.two all-round yellow lights in a vertical line
D.three all-round green lights in a vertical line