carried the MM38 Exocet. As Pegasus was constructed several years before the rest of the series, there are some slight differences, such as the fire-control system. All six vessels were constructed by Boeing, in Seattle at the Renton plant at the south end of Lake Washington. They were stationed at NAS Key West. Principal contractors, along with Boeing, were Sperry Corporation for MK 92 Mod 1 fire control system, Hollandse Signaalapparaten and Sperry Corp. (under license) for WM 28 fire control system, OTO-Melara for 76 mm gun, and NAVSEC for design support. The technology was first pioneered by , where it successfully operated in Vietnam, but ultimately ran aground off Puerto Rico. It was judged to be more advanced than the Grumman which was built at the same time to the same requirements. The primary technology, also used in the Boeing Jetfoil ferries, used submerged flying foils with waterjet propulsion. The ships were retired because they were not judged cost effective for their mission in a Navy with primarily offensive missions rather than coastal patrol. USS Aries PHM-5 Hydrofoil Memorial, Inc. obtained Aries for rehabilitation as a memorial located on the Gasconade River in Gasconade, Missouri at . All other PHMs in the class were sold for scrap. In the early 2000s Gemini was converted into a yacht, but was abandoned by its owners in the 2010s and scrapped in 2017. List of ships (9 July 1977 – 30 July 1993), formerly Delphinus (18 December 1982 – 30 July 1993) (10 October 1981 – 30 July 1993) (26 June 1982 – 30 July 1993) (18 September 1982 – 30 July 1993) (13 November 1982 – 30 July 1993) See also Boeing hydrofoils , a Canadian hydrofoil intended for anti-submarine duties , a Royal Navy Jetfoil mine countermeasure vessel. Matka-class missile boat, a class of Soviet PHM Sarancha-class missile boat, a class of Soviet PHM , a class of Italian PHM PHM Pegasus, a videogame based on this class of vessels References Gardiner, Robert and Stephen Chumbley. Conway's All The World's Fighting Ships 1947–1995. Annapolis, Maryland, USA: Naval Institute Press, 1995. . McLeavy, Roy. Jane's Surface Skimmers: Hovercraft and Hydrofoils 1975–76. Jane's Yearbooks, 1975. . Jenkins, George. "Patrol Combatant Missile (Hydrofoil): PHM History 1973–1995" (pdf). Foils.com, 1 November 2000. Retrieved 5 September 2012. External links Boeing page USS Aries PHM-5 Hydrofoil Memorial, Inc. - Brunswick, Missouri Missile boat classes