USS Thresher (SSN-593)
The second USS Thresher served as the lead boat of its class of nuclear attack submarines in the US navy. However, a tragedy happened on April 10, 1963. It sank as it underwent deep-diving tests around 220 miles east of Boston. The 129 crew members aboard the vessel died. This pushed the US Navy to implement a thorough submarine safety program called SUBSAFE.
USS Thresher SSN 593
USS Scorpion (SSN-589)
The Skipjack-class nuclear submarine below is the USS Scorpion. The US Navy used it, but it was the sixth vessel to carry this name! It was lost on May 22, 1968. As a result of the accident, 99 crew members died. It is the second nuclear submarine that the US navy ever lost. It was also one of four submarines to disappear in 1968, along with the Israeli INS Dakar, the French Minerve, and the Soviet K-129.
USS Scorpion SSN 589
