Work begins on turning Confederate sub upright

NORTH CHARLESTON, S.C. (AP) - Work begins this week on turning the Confederate submarine H.L. Hunley upright to try to find out why it sank off Charleston in 1864.

The Hunley is the first sub in history to sink an enemy warship. It has been in a sling on its side at a North Charleston conservation lab since it was raised more than a decade ago.

Officials with the Hunley project said Monday the vessel will be raised Wednesday from its tank of water. The process of turning the Hunley upright begins next week.

Turning the vessel upright will expose sections of the hull not seen since before the vessel sank. Scientists hope that will help solve the mystery of why the hand-cranked sub sank after sinking a Union blockade ship.

Copyright 2011 The Associated Press. All rights reserved.