apparatus, and larger storage batteries, the submarine recommissioned 24 March 1953. She joined the Atlantic Fleet for training exercises and tactical drills in the years that followed, operating mainly in the Caribbean and off the East Coast of the United States. She sailed for the Mediterranean 7 September 1956 to strengthen the 6th Fleet during the Suez Crisis. In July 1958 Hardhead, joined Submarine Development Group 2, turning her attention from fleet operations to research and testing of equipment and tactical doctrine. She operated off the East Coast and in the north Atlantic, and by 1961 had won four consecutive "E" awards for her performance. Hardhead continued through 1972 to perform this vital work in maintaining the technical superiority and readiness of the fleet. In 1962, Hardhead participated in the Cuban Missile Crisis. Greek service Hardhead was decommissioned, struck from the Naval Register, and transferred (sold) under the terms of the Security Assistance Program to Greece. On 26 July 1972 raised the Greek flag at New London (Connecticut) by Lieutenant Commander Nikolaos Vassiliou and sailed to Greece on 29 December 1972. She was commissioned into the Hellenic Navy as Papanikolis (S-114). She was struck from the Greek Naval rolls on 4 May 1993. References External links fleetsubmarine.com: USS Hardhead Balao-class submarines Ships built in Superior, Wisconsin 1943 ships World War II submarines of the United States Cold War submarines of the United States Balao-class submarines of the Hellenic Navy