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A capstan is specifically an apparatus designed for hoisting and hauling weights, commonly used on ships. It typically consists of a vertical rotating drum that can pull heavy loads, such as anchor chains or cargo, using ropes or cables. The operation of a capstan often involves a crew who wraps a rope around the drum and uses the leverage provided by turning the drum to lift or pull the desired weight more efficiently.

In contrast, steering a ship is accomplished through a helm or rudder, not a capstan, which is focused on lifting and moving heavy objects rather than navigation. Navigational tools include compasses and sextants that help in determining position, which is unrelated to the function of a capstan. Similarly, weather forecasting instruments, such as barometers and anemometers, are used for analyzing atmospheric conditions, making them distinct from the mechanical function of a capstan in a maritime setting.

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