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单选题
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
A
yellow lights at each end
B
two red lights in a vertical line
C
a black ball
D
a diamond shape
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单选题Which vessel is NOT classified as “restricted in her ability to maneuver” （）.A
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考题
单选题In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.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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they should slip simultaneouslyD
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考题
单选题A tug would NOT assist a ship to steer if the tug is made up to the large vessel（）.A
by a tow line ahead of the vesselB
forward on either bow of the vesselC
approximately amidships of the vesselD
on the vessel's quarter
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
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考题
单选题If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.A
change courseB
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heave toD
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单选题A single towing light will be carried above a vessel’s sternlight（）.A
only if she is towing asternB
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单选题In restricted visibility a towed vessel must sound a fog signal when it is（）.A
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the last vessel in the tow and it is carrying a crewC
manned，regardless of its position in the towD
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考题
单选题A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.A
two balls in a vertical lineB
a diamond shape where it can best be seenC
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单选题In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because（）.A
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towing speed is improvedC
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考题
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单选题A partly submerged vessel or object being towed，which is not readily noticeable，shall show （） .A
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考题
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 strainB
catenary lengthC
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Williamson's Tow
考题
单选题Any vessel（）any other shall keep out of the way of the vessel（）.A
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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
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考题
单选题A vessel or object being towed astern shall display a(n)（）.A
forward masthead lightB
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stern lightD
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考题
单选题If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.A
pushed aheadB
towed alongsideC
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考题
单选题An all-round flashing yellow light may be exhibited by a(n)（）.A
vessel laying cableB
vessel towing a submerged objectC
vessel not under commandD
air cushion vessel
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