A.diving operations
B.dredging
C.fishing
D.mineclearance operations
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A.engaged in underwater construction
B.under sail and power
C.a pilot vessel
D.trawling
A.three black shapes in a vertical line; the highest and lowest are balls，and the middle one is a diamond
B.three shapes in a vertical line; the highest and lowest are red balls，and the middle one is a white diamond
C.three black balls in a vertical line
D.two black balls in a vertical line
A.not under command
B.engaged on pilotage duty
C.restricted in her ability to maneuver
D.engaged in fishing
A.forward masthead light
B.after masthead light
C.stern light
D.All of the above
A.two red lights at night and two black balls during daylight
B.two red lights at night and three black balls during daylight
C.three red lights at night and two black balls during daylight
D.three red lights at night and three black balls during daylight
最新試題
A vessel is underway with a work stage rigged over the side. A seaman may work on the stage，but only when（）.
A vessel is “l(fā)isted” when it is（）.
A vessel is inclined at an angle of loll. In the absence of external forces，the righting arm (GZ) is（）.
A vessel engaged in fishing，and at anchor，shall show（）.
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 vessel traveling down a narrow channel，especially if the draft is nearly equal to the depth of the water，may set off the nearer side. This effect is known as（）.
A vessel not under command shall display（）.
A vessel is considered to be “restricted in her ability to maneuver” under the Rules if she is （）.
A vessel hearing a fog signal forward of her beam has not determined if risk of collision exists. She shall reduce speed to（）.
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? （）