The Confederate Submarine H.L. Hunley actually sank 3 times: August 29, 1863 - Sank during test dive preparations when dive planes were prematurely engaged. October 15, 1863 - Failed to surface after...
The Hunley, before she was salvaged and moved to the old Charleston Naval Shipyard, was essentially covered in 3 feet of over 100 years of silt and mud from Charleston Harbor. It's estimated that it...