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201. What size sheave diameter should be used with a 3-inch manila line?
A sheave diameter of 6 inches is correct; standard practice dictates a sheave diameter approximately twice the line's circumference, which is 6 inches for a 3-inch manila line. Smaller sheaves create tight bends that damage the line, while larger sheaves are unnecessary. This rule is commonly tested on USCG license exams.
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