Hull speed

Hull speed is determined by the waterline length of the boat and only applies to displacement boats, meaning boats which sit in the water and generate a wake whose two waves pass by on either side of the hull. At hull speed, the length of the wave equals the waterline length of the hull. To travel faster than this, the boat needs to punch its way through this wave and sail boats lack the power to accomplish this. Planing-hulls sit on top of the water and thus are not subject to the same limitations.

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