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
第1题
Catenary as applied to tow lines denotes the ______.
A.Dip of the line
B.Stretch of the line
C.Strain on the line
D.Length of the line
第2题
A.amount of chain lying along the bottom increases
B.length of the catenary is reduced
C.mooring line tension is increased
D.amount of chain lying along the bottom decreases
第3题
A.environmental forces
B.bottom conditions
C.cable weight
D.water density
第4题
A.a short bridle
B.the downward curvature of the hawser
C.another name for a pelican hook
D.used to hold it amidships
第5题
Cable tension for catenary calculations is taken at the ______.
A.chain locker
B.fairlead
C.anchor
D.contact point of chain with seabed
第6题
The biggest problem you generally encounter while towing a single tow astern is ().
A.The catenary dragging on the bottom
B.Swamping of the tow
C.The tow tending to dive
D.Yaw
第7题
The catenary in a towline is ______.
A.a short bridle
B.the downward curvature of the hawser
C.another name for a pelican hook
D.used to hold it amidships
第8题
A.increase fatigue life of the system
B.reduce the time to retrieve the line
C.increase the holding power
D.reduce the catenary
第9题
The disadvantage of using a heaving line to pass a towline is that ______.
A.it increases the likelihood of collision between the towing vessel and the disabled vessel
B.recreational boaters tend to make the heaving line fast to the towed vessel as if it were the towline
C.the monkey fist may injure someone
D.it may reduce the catenary and increase yawing
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