Lost with all 129 men on 10 April 1963 during deep-diving trials 220 miles east of Cape Cod. First nuclear submarine ever lost. Worst submarine disaster in American naval history. The investigation produced SUBSAFE. Every submarine built since 1963 lives by her loss. Her crew remains on eternal patrol.

Lead ship of the renamed class. Pacific Fleet Cold War operations. Incorporated SUBSAFE modifications directly from the Thresher investigation. Proved the deep-diving fast-attack concept that the class was designed to validate.

Pacific Fleet intelligence collection and barrier patrol through the Vietnam era and into the 1980s. Operated in the growing Soviet submarine threat environment of the Western Pacific across two decades of Cold War service.

Named for SS-220, the most decorated American submarine of WWII. Commander Eugene Fluckey earned the Medal of Honor. His crew landed in Hokkaido and destroyed a Japanese train. SSN-596 carried that name into the nuclear era.

Pacific Fleet Cold War operations. Extensive missions tracking Soviet submarines out of Vladivostok and Petropavlovsk. Gathered intelligence on patrol patterns and acoustic signatures across two decades of Cold War service.

Pacific Fleet Cold War fast-attack operations. Intelligence collection on Chinese naval developments alongside Soviet submarine tracking in the Western Pacific. Operated in the Vietnam War era when Pacific Fleet submarines carried responsibilities well beyond standard ASW.

Atlantic Fleet. GIUK gap and Mediterranean operations through the Cold War. Positioned in the corridor Soviet submarines had to transit to reach the open Atlantic. If they came west, Jack was waiting.

Named for SS-283, a Gato-class boat with 11 Pacific War patrols. Atlantic Fleet Cold War service. Carried one of the Pacific War's storied submarine names into the nuclear era across multiple decades of Cold War operations.

Named for SS-247, which with USS Darter discovered and attacked the Japanese Center Force at Palawan Passage on 23 October 1944. That attack opened the Battle of Leyte Gulf by sinking two heavy cruisers. Pacific Fleet Cold War operations.

Last Permit-class submarine commissioned. Pacific Fleet Cold War fast-attack operations. Decommissioned 1992. The class she closed out proved the deep-diving nuclear fast-attack concept and directly influenced the Sturgeon class that followed.