"Tiru" participated in Exercise "Sea Rover," with United States and Australian naval units, before heading home for the United States at the conclusion of her WestPac deployment. While approaching Guam for voyage repairs, she routinely copied the evening weather broadcast which was accompanied by an urgent alert notifying the ship of a search and rescue (SAR) operation underway to look for and rescue survivors of a small craft which had been adrift for two days in a heavy sea. An extensive search by Guam-based SAR forces had thus far turned up nothing, but "Tiru" located the five people—two of them Japanese nationals—and rescued them, despite darkness and high seas. Soon after "Tiru"s arrival at Guam on 14 April 1970, the Japanese consul visited the submarine to express his government's appreciation for the ship's rescue mission.