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
Catenary as applied to tow lines denotes the（）.
In order to back a right-handed，single-screw vessel in a straight line，you will probably need to use（）.
At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.
A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back（）.
In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.
Apparent wind speed blowing across a vessel under tow can be measured by a(n)（）.
In a following sea，a wave has overtaken your vessel and thrown the stern to starboard. To continue along your original course，you should（）.
It is easier to dock a right-hand，single-screw vessel（）.
In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to（）.