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A hovercraft has a skirt that traps a curtain of air under the vehicle, providing a near frictionless interface that allows the vehicle to travel over any type of terrain, including water.

A hydrofoil is a ship that can only travel on water. It uses a wing type foil to provide lift to bring most of the hull out of the water, greatly reducing friction and allowing the ship to move very fast through the water.

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11y ago

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