OTDIH October 15, 1863 the submarine H. L. Huntley sunk, killing its inventor

On October 15, 1863 the Confederate submarine H. L. Hunley sank during a test dive in Charleston harbour, South Carolina, killing its inventor Horace L. Hunley and 7 crewmen. The Confederate navy salvaged the submarine and returned it to service (only to sink again in February 1864).