Subsequently arriving at San Diego on 8 May after a brief period at Pearl Harbor, "Tiru" conducted local operations, transited to San Francisco to undergo an overhaul at Hunters Point Naval Shipyard and returned to San Diego prior to being transferred to the Atlantic Fleet on 1 August 1970. Underway on 6 August for Charleston, South Carolina, her new home port, "Tiru" called at Acapulco, Mexico; Rodman, Canal Zone; transited the Panama Canal; and visited Kingston, Jamaica, before reaching Charleston harbor on 2 September. For the remainder of the year, the ship conducted local operations, provided services, and underwent type training—activities which continued into 1972. Later transferred to SubFlot 6, SubRon 4, SubDiv 41, during 1972, "Tiru" operated in the Caribbean Sea and off the lower East Coast of the United States, with two deployments to European waters, into 1975.