The H.L. Hunley Reveals Its Last Secret
The H.L. Hunley—the world’s first successful attack submarine, in service with the Confederate Navy in 1864—has finally revealed its propulsion secret more than 17 years after being raised off the ocean floor. The Hunley was nearly 40 feet long, was built at Mobile, Alabama, and launched in July 1863. She was then shipped by rail on August…