Perry Class FrigateOriginally to be 75 in number, a total of 55 FFG 7 OLIVER HAZARD PERRY class ships were built, including 51 for the US Navy and four for the Royal Australian Navy. Australia subsequently built a further ship of this design at a very high cost. Spain also built to this design and a modified design was built in Taiwan (the Cheng Kung Class). Of the 51 ships built for the US Navy, 28 are in active commissioned service and 2 are in the Naval Reserve Force