A.dip of the line
B.stretch of the line
C.strain on the line
D.length of the line
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A.it is faster
B.it can be used in both the immediate action and the delayed action situations
C.in fog，if the turn is started as soon as the man goes over，the vessel will be at the point where he went over when the turn is completed
D.it returns the vessel to the original track line on a reciprocal course
A.red lights
B.red lights and two white lights
C.red lights with a white light in between
D.white lights with a red light in between
A.increase
B.decrease
C.change only if the vessel comes about on the opposite tack
D.not change
A.propeller velocity
B.speed of advance
C.wake distribution
D.wake fraction
A.barometer
B.wind vane
C.anemometer
D.thermometer
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A vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel is called（）.
A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back（）.
If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.
One advantage of chain over wire rope for a tow bridle is that chain（）.
Once a towline is connected between the towing vessel and the disabled vessel，the towing vessel should（）.
In towing，heaving lines are used for（）.
In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because（）.
Most of your vessel’s superstructure is forward. How will the vessel lie when drifting with no way on?（）.
A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit （）.