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A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a ______.
A.main brace
B.tow span
C.jockey bar
D.None of the above
参考答案
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单选题A vessel towing a barge astern would show，at the stern（）.A
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单选题A power-driven vessel，when towing astern，shall show（）.A
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单选题A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.A
main braceB
tow spanC
jockey barD
None of the above
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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
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managanese bronzeB
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单选题A cofferdam is（）.A
any deck below the main deck and above the lowest deckB
a member that gives fore-and-aft strengthC
made by placing two bulkheads a few feet apartD
a heavy fore-and-aft beam under the deck
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