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The boom stops are installed on a crane to ______.

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It is dangerous for vessels without the use of radar ______ the

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When one of the signed bills of lading is accomplished，the other

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A wooden float placed between a ship and a dock to prevent damag

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In order to pay out or slack a mooring line which is under strai

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Your vessel is anchored in an open roadstead with three shots of

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One of the principal dangers inherent in liquefied petroleum gas

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A tackle by which the outer end of a boom is raised and lowered

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The BEST method of applying foam to a fire is to ______.

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When navigating a vessel，you ______.

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