A.do not interfere with the keeping of a proper look-out
B.are not the color of either sidelight
C.have a lesser range than the prescribed lights
D.All of the above
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A.a red light over a white light
B.a white light over a red light
C.a green light over a white light
D.two red lights in a vertical line
A.a vessel restricted in her ability to maneuver
B.a vessel not under command
C.a vessel constrained by her draught
D.a vessel not under way
A.under sail
B.restricted in her ability to maneuver
C.crossing a channel
D.All of the above
A.white
B.green
C.red
D.yellow
A.one black ball
B.two cones with bases together
C.a cone，apex downward
D.two cones，apexes together
最新試題
A proper look-out must be kept（）.
The Rules state that vessels may depart from the Rules when（）.
A vessel engaged in mine clearance operations is called（）.
A vessel engaged in trawling will show identification lights of（）.
A vessel engaged in fishing shall keep out of the way of a vessel（）.
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.
One of the factors which affects the circulation of ocean currents is（）.
If the circumstances admit，（）of small alteration of course and speed shall not be taken to avoid collision.
A vessel（）when underway shall so far as possible，keep out of the way of a vessel not under command.
A vessel continually lists to one side and has a normal rolling period. Which statement is TRUE?（）.