What device is used to minimize kinking and/or twisting of the anchor chain?

The device used to minimize kinking and twisting of the anchor chain is a swivel. Swivels are specifically designed to allow for free rotation of the anchor chain, which helps prevent it from tangling or twisting during use. This is particularly important when the anchor is lowered into the water and retrieved, as any twisting can lead to operational difficulties and potentially damage the chain or anchor equipment.

In the context of anchoring, a swivel acts as a crucial link between the anchor and the chain, enabling the anchor to rotate freely without transferring that motion to the chain itself. This feature helps maintain the integrity and ease of use of the entire anchoring system, ensuring that the anchor can deploy and retrieve smoothly without getting caught up.

Other choices, while having their respective functions, do not serve the specific purpose of reducing kinking and twisting of the chain as effectively as a swivel does. A whip is generally used for guiding or controlling an object, a shackle connects different components but doesn't allow rotation, and a pulley provides a different mechanical advantage in lifting but does not specifically address twisting issues in anchor chains.