Confederate sub’s weapon killed its own crew, researchers find

The Confederate submarine CSS H. L. Hunley bears the distinction of being the first submarine to ever sink an enemy ship. But the Hunley, a work of state-of-the-art engineering for its time, never returned from that mission on February 17, 1864. Instead, after exploding a "torpedo" below the waterline of the Union sloop-of-war USS Housatonic in Charleston Harbor, the sub was lost at sea.
Read more: https://arstechnica.com/gadgets/2017/08/confederate-subs-weapon-killed-its-own-crew-researchers-find/?source=Snapzu