The Confederate Submarine H.L. Hunley

The Confederate Submarine H.L. Hunley is credited with the first recorded successful underwater attack, against the USS Housatonic using a torpedo, which was projected from the submarine by a pole. Eight men turned the propeller using a handcrank. Maximum speed was 4 knots. Air was provided by two four-foot pipes, although the hull contained enough air for approximately ½ hour of submerged operations.