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单选题
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.
A
tow strain
B
catenary length
C
being in step
D
Williamson's Tow
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单选题A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.A
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考题
单选题When towing astern，increased catenary will（）.A
increase control of the towB
prevent the towing vessel from going in ironsC
make the towing vessel less maneuverableD
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考题
单选题Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）A
By day，she shall carry a black cylinder shapeB
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考题
单选题An ocean tow is sinking in deep water. Attempts to sever the towing hawser are unsuccessful. Which action should now be taken? （）A
Abandon the towing vesselB
Radio for emergency assistanceC
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考题
单选题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（）.A
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单选题You have a large，broken-down vessel in tow with a wire rope and anchor cable towline. Both vessels have made provision for slipping the tow in an emergency; however，unless there are special circumstances（）.A
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the vessel towed should slip firstC
they should slip simultaneouslyD
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考题
单选题A vessel brought alongside should be fended off the towing vessel by（）.A
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考题
单选题The length of a wave is the length（）.A
of the wave's crestB
of the wave's troughC
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measured from crest to crest
考题
单选题A vessel，which does not normally engage in towing operations，is towing a vessel in distress.She（）.A
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考题
单选题A vessel towing where the tow prevents her from changing course shall carry（）.A
only the lights for a vessel towingB
only the lights for a vessel restricted in her ability to maneuverC
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考题
单选题If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.A
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考题
单选题Once a towline is connected between the towing vessel and the disabled vessel，the towing vessel should（）.A
not exceed bare steerageway during the transitB
take a strain as soon as you can to control the towC
come up to speed very slowly and maintain a safe speedD
come up to speed quickly，then cut back power considerably to ease the strain
考题
单选题For safety reasons，when assistance towing（）.A
the disabled vessel should be towed to the nearest portB
the disabled vessel should be inspected for flammable gasesC
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考题
单选题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（）.A
the masthead lights for a towing vesselB
the lights for a vessel restricted in its ability to maneuverC
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考题
单选题A situation has occurred in which your vessel must be towed. When the towing vessel passes the towing line to you，you should secure the line（）.A
to the base of the foremastB
to the forward-most bittsC
to the forward part of the deckhouseD
at the stern
考题
单选题A vessel aground would show the same dayshape as a（）.A
vessel towing a submerged objectB
dredge underway and dredgingC
hydrographic survey vessel at anchor and surveyingD
None of the above
考题
单选题In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because（）.A
shock loading on the tow line is reduceB
towing speed is improvedC
the vessel is more visible from the tugD
the catenary of the tow line is reduced
考题
单选题The condition where a ship on the end of a tow line is riding a wave crest at the same time as its tug rides a wave crest is known as riding in（）.A
synchronismB
harmonyC
checkD
step
考题
单选题A towing vessel and her tow are severely restricted in their ability to change course. When making way，the towing vessel will show ONLY（）.A
the masthead lights for a towing vesselB
the lights for a vessel restricted in her ability to maneuverC
sidelights，stern light，and towing lightD
All of the above
考题
单选题When towing in an open seaway，it is important to use a towing line（）.A
made only of wire rope，due to possible weather conditionsB
that will have the tow on a crest while your vessel is in a troughC
that will have the tow on a crest while your vessel is on a crestD
with little dip to gain maximum control of the tow
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