What Is the USS Thresher?
The USS Thresher is an American naval submarine which was lost in 1963 during deep diving exercises. The fate of the USS Thresher triggered a number of concerns about the safety of nuclear-powered submarines, and spurred the United States Navy to establish a safety program to provide enhanced training and disaster response. This program, known as SUBSAFE, provides quality control and safety assurances for the entire nuclear-powered fleet.