American planes made strikes on Tokyo and other cities of the Japanese homeland, Tigrone encountered increasing numbers of Japanese search planes. On 11 August, the first reports of Japan's surrender were received, but, for two more days, Tigrone continued her patrols, approaching within 50 miles (80 km) of the shore of Sagami Wan as she pursued lifeguard duties. On 13 August, with Navy pilots helping to spot targets, she bombarded Mikomoto Island, scoring 11 hits on a radio station and lighthouse tower. The submarine claimed this action as the final bombardment of the war. On 14 August, Tigrone rescued another aviator who had been forced to parachute from his plane and, later in the day, spent an anxious half-hour attempting to evade persistent sonar contacts which turned out to be birds. On 15 August, she received orders to cease all attacks; and, the next day, the official statement of Japan's surrender was published. She patrolled off the east coast of Japan as far north as Sendai and Todo Saki. Then, on 30 August, she rendezvoused with "Benny's Peacemakers" and, on the last day of August, moored in Tokyo Bay. She departed Tokyo on 2 September and made her way via Hawaii and the Canal Zone to New London, arriving there early in October 1945. Post-war activities Later that month, she visited Washington, DC, for Navy Day activities and, late in December, reported to the Sixth Fleet at Philadelphia, Pennsylvania, for preservation procedures preparatory to inactivation. She was towed to New London and placed out of commission, in reserve, on 30 March 1946. On 12 April 1948, her hull classification symbol was changed to SSR-419, radar picket submarine. In June, she was towed from New London to Portsmouth for conversion. She was recommissioned on 1 November 1948 and, early in 1949, conducted shakedown out of Portsmouth in preparation for her new duties as an Arctic radar picket. That summer, she joined Submarine Division 62 operating out of Norfolk to begin activities evaluating new radar equipment and techniques for long range air defense. She continued in this role until 1957, operating in the Atlantic and Caribbean Sea and completing five Mediterranean Sea deployments with both American and NATO forces. On 1 August 1957, her status was changed to in commission, in reserve, and, on 1 November, she was decommissioned. She was assigned to the Atlantic Reserve Fleet and berthed at Philadelphia, Pennsylvania.