單項(xiàng)選擇題A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights（）.

A.are not the same color as either side light
B.have a lesser range of visibility than the prescribed lights
C.do not impair the visibility or distinctive character of the prescribed lights
D.All of the above


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1.單項(xiàng)選擇題A vessel is underway with a work stage rigged over the side. A seaman may work on the stage，but only when（）.

A.wearing a life jacket
B.wearing a safety harness secured to the stage
C.wearing both a life jacket and a safety harness secured to the stage
D.the vessel is not making way

2.單項(xiàng)選擇題A vessel is to make a voyage between New York and San Juan，Puerto Rico，and return. The crew should be signed on（）.

A.Coastwise Articles
B.Foreign Articles
C.Intercoastal Articles
D.no articles

3.單項(xiàng)選擇題A vessel is overtaking when she can see which light(s) of a vessel ahead?（）

A.Only the stern light of the vessel
B.One sidelight and a masthead light of the vessel
C.Only a sidelight of the vessel
D.The masthead lights of the vessel

5.單項(xiàng)選擇題A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment? （）

A.If the quadrantal spheres are out as far as possible replace them with smaller spheres
B.If the quadrantal spheres are in as far as possible remove one of the spheres
C.If the quadrantal spheres are in as far as possible replace them with smaller spheres
D.If the quadrantal spheres are out as far as possible，move the quadrantal spheres in