单项选择题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.单项选择题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.单项选择题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.单项选择题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.单项选择题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

6.单项选择题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? ()

A.If the quadrantal spheres are all the way out,replace them with smaller spheres
B.If the quadrantal spheres are all the way in,replace them with larger spheres
C.If the quadrantal spheres are all of the way out,move the spheres in
D.If the quadrantal spheres are all the way out,replace them with larger spheres.

7.单项选择题A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment? ()

A.Move the quadrantal spheres closer to the compass
B.Raise the heeling magnet if the red end is up
C.Remove some of the Flinders bar
D.Raise or lower the athwartship magnets

8.单项选择题A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?()

A.If the blue ends of the magnets are aft,and the fore-and-aft tray is at the top,you should add some magnets.
B.If the blue ends of the magnets are aft you should lower the fore-and-aft tray
C.If the blue ends of the magnets are aft,and the fore-and-aft tray is at the top,you should reverse the magnets
D.If the blue ends of the magnets are forward,and the fore-and-aft tray is at the bottom,you should add some magnets

9.单项选择题A vessel is equipped with twin propellers,both turning outboard with the engines half ahead. If there is no wind or current and the rudders are amidships,what will happen?()

A.The bow will swing to starboard
B.The bow will swing to port
C.The vessel will steer a zigzag course
D.The vessel will steer a fairly straight course.

10.单项选择题A vessel is entering port “A” for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do? ()

A.Nothing; The Pilot is required by law and is solely responsible for the safety of the vessel
B.State his concerns to the Pilot but do not interfere with the handling of the vessel
C.Direct the Pilot to stop the vessel and anchor if necessary until the situation clears
D.Recommend an alternative action and if not followed relieve the Pilot