On 15 June 1970 "Flasher" commenced her first major overhaul at Pearl Harbor Naval Shipyard, which was completed by 12 June 1971. In November 1971 "Flasher" commenced another WESTPAC deployment, visiting Guam, Mariana Islands; White Beach, Okinawa; Yokosuka, Japan; Subic Bay, Philippines, and Hong Kong, before returning to her home port in June 1972. On 1 July 1972 "Flasher" was awarded her third Battle Efficiency "E" for overall combat excellence, and on 13 July 1972 received a visit from Secretary of the Navy John Chafee. On 19 August 1972 "Flasher" was awarded a Presidential Unit Citation, at a ceremony, where CDR R.F. Bacon assumed command. Bacon would later go on to become Vice Admiral and Assistant Chief of Naval Operations for Undersea Warfare. "Flasher" then participated in the RIMPAC 72 exercise that September.