A.propeller velocity
B.speed of advance
C.wake distribution
D.wake fraction
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A.barometer
B.wind vane
C.anemometer
D.thermometer
A.during the day，three balls in a vertical line
B.during the day，three shapes，the highest and lowest being balls and the middle being a diamond
C.when making way at night，two all-round red lights，sidelights，and a sternlight
D.when making way at night，masthead lights，sidelights，and a sternlight
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
A.smelling the bottom
B.squatting
C.bank suction
D.bank cushion
A.the masthead lights for a towing vessel
B.the lights for a vessel restricted in its ability to maneuver
C.sidelights，sternlight and towing light
D.All of the above
最新試題
If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.
In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
One advantage of chain over wire rope for a tow bridle is that chain（）.
If the towline parts，you should（）.
Most of your vessel’s superstructure is forward. How will the vessel lie when drifting with no way on?（）.
A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit（）.
As a ship moves through the water，it drags with it a body of water called the wake. The ratio of the wake speed to the ship’s speed is called（）.
A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back（）.
A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit （）.
Besides saving distance along the track line，another advantage of the Scharnow Turn over the Williamson Turn in a man overboard situation because（）.