PCH-1 ("patrol craft hydrofoil") High Point was the U.S. Navy’s first operational hydrofoil and the first vessel of the Boeing hydrofoil family. The 117–foot-long (35-meter-long) High Point was primarily used for research and the development of antisubmarine warfare concepts. High Point was launched on Aug. 15, 1963, and tested on Puget Sound from 1963 to 1967. Powered by twin gas-turbine engines that drove four propellers, High Point was able to attain speeds of 50 knots (57 mph/92 kph). In 1975, High Point was transferred to the U.S. Coast Guard for evaluation, but without funds to replace a blown engine, it was returned to the Navy and retired.