hydrofoil
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A hydrofoil ferry. The entire hull of the boat is lifted out of the water on the hydrofoils, allowing the boat to skim more rapidly over the surface of the water.
Wing that develops lift in the water in much the same way that an aeroplane wing develops lift in the air. A hydrofoil boat is one whose hull rises out of the water owing to the lift, and the boat skims along on the hydrofoils. The first hydrofoil was fitted to a boat in 1906. The first commercial hydrofoil went into operation in 1956. One of the most advanced hydrofoil boats is the Boeing jetfoil. Hydrofoils are now widely used for fast island ferries in calm seas.
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