2025-06-30 United States:•XCH-4: An experimental vessel designed by John Carl with U.S. Navy funding, powered by two radial piston engines. It set a speed record of 78 knots (144 km/h) in 1955.•PCH-1 (High Point): The U.S. Navy's first experimental hydrofoil, launched in 1963. It was used to test automatic con
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