On 12 July 1962, "Seadragon" departed Pearl Harbor for her second Arctic cruise. Transiting the Bering Strait and the Chukchi Sea, she contacted T-3, then moved further north to rendezvous with sister ship, , en route from New London, Connecticut. On 31 July, the two submarines rendezvoused under the ice and continued on to the North Pole, arriving on 2 August for sonar and weapons evaluations. The submarines were joined by the icebreaker . In late August, the submarines returned to their home ports. En route, "Seadragon", which was scheduled to port at Seattle, Washington, rescued 12 survivors from a downed seaplane and delivered them to Port Angeles, Washington. On 14 September, "Seadragon" arrived back at Pearl Harbor. During the first half of 1963, "Seadragon" participated in local operations and conducted her second WestPac cruise. On 8 July, she entered the Pearl Harbor Naval Shipyard for her first refueling and overhaul. In late May 1964, she resumed operations in the Hawaiian area. Torpedo evaluations off the Washington coast followed; and, on 10 August 1964, "Seadragon" sailed west in response to the Gulf of Tonkin incident. During September and October, she operated out of Subic Bay; then, after a call at Hong Kong continued on to Okinawa and Japan to conduct public relations cruises and to participate in further Seventh Fleet exercises. On 27 October 1964, "Seadragon" became the first nuclear powered vessel to visit Hong Kong. This was followed shortly by an historic entry into Japanese waters and a port visit to Sasebo, Japan, on 12 November 1964. The visit was protested by China and the Soviet Union; the Soviets in particular warned that the visit would eventually lead to the introduction of nuclear weapons to Japan and alter the security status quo in East Asia. On 4 March 1965, she returned to Pearl Harbor. Again, in the fall of 1966 and early 1967, "Seadragon" became the first SSN to visit Yokosuka, Japan. She was the first nuclear powered vessel the Japanese government permitted to enter her home waters. This achievement has since often been compared with Commodore PERRY's first expedition to Japan in 1853 as an achievement in international diplomacy. "Seadragon" was the first SSN to visit Hobart, Australia in January 1983. In twenty-four years of active service, "Seadragon" steamed over 200,000 miles, dove and surfaced 1800 times, made thirteen deployments to the Western Pacific, and conducted four under ice operations.