![USS Squalus (SS-192) getting pulled up from the bottom of the ocean. US Navy Photo](https://news.usni.org/wp-content/uploads/2014/05/squalus.jpg)
In 1939 the Sargo-class submarine USS Squalus (SS-192) sank off the coast of New Hampshire during a test dive. On May 23, the diesel-electric submarine went down resulting in the death of 26 sailors. Thirty-three survived.
The Naval History Blog has the whole story.