默认题库 - 船舶操纵基本知识

单选题

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. a vessel restricted in her ability to maneuver
B. a vessel not under command
C. a vessel engaged in fishing
D. a vessel constrained by her draught

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单选题

As a vessel falls off the wind from close-hauled to a beam reach，the tendency for the vessel to move sideways through the water will（）.

A. increase
B. decrease
C. change only if the vessel comes about on the opposite tack
D. not change

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单选题

Besides saving distance along the track line，another advantage of the Scharnow Turn over the Williamson Turn in a man overboard situation because（）.

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

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单选题

If you are the stand-on vessel in a crossing situation，you may take action to avoid collision by your maneuver alone. When may this action be taken?（）.

At any time you feel it is appropriate
B. Only when you have reached extremis
C. When you determine that your present course will cross ahead of the other vessel
D. When it becomes apparent to you that the give-way vessel is not taking appropriate actio

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单选题

In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.

A. to starboard
B. outboard from the center
C. to port
D. inboard toward the center

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单选题

The catenary（）.

A. acts as a reserve length of towing hawser when the tug applies more power，and it dampens the surge effect of the tow
B. gives an approximation of the amount of strain on the towing hawser
C. is the dip in the towing hawser between the tug and the tow
D. All of the above

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单选题

A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.

A. forward spring line and going slow ahead on the inboard engine
B. after spring line and going slow astern on the outboard engine
C. forward spring line and going slow ahead on both engines
D. forward spring line and going slow ahead on the outboard engine

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单选题

Most of your vessel’s superstructure is forward. How will the vessel lie when drifting with no way on?（）.

A. With the wind from ahead
B. With the wind off the port beam
C. With the wind off the starboard beam
D. With the wind from abaft the beam

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单选题

How does the effect known as bank suction act on a single-screw vessel proceeding along a narrow channel?（）.

A. It pulls the bow toward the bank
B. It pushes the entire vessel away from the bank
C. It pulls the stern toward the bank
D. It heels the vessel toward the bank

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单选题

At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.

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 betwee

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