Which tackle arrangement has the LEAST mechanical advantage?
Official USCG Answer & Rule Citation
Correct Answer: Option D — Single whip
A single whip consists of a single fixed block with no mechanical advantage, providing only a change in the direction of pull. Compared to a gun tackle (2:1), luff tackle (3:1), or twofold purchase (4:1), the single whip offers the least mechanical advantage for lifting loads.
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