The second USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy. Her loss at sea in the .\rbr\rbrThe USS Thresher was the best of its class, it could dive deeper, maneuver faster and quieter, and detect other subs from a greater distance than any other sub .\rbr\rbrUSS Thresher SSN 593 Full DocumentaryUSS Thresher SSN 593 Full DocumentaryUSS Thresher SSN 593 Full DocumentaryUSS Thresher SSN 593 Full .\rbr\rbrThe second USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy. Her loss at sea in the .