It’s been nearly seven months since the cruise ship Costa Concordia grounded off the coast of Italy, leaving 32 dead. After lying on its side since the January 13th grounding, Costa Concordia will next be stood back up, re-floated and towed to an Italian port. But what looks to be a simple operation will involve the coordination of several salvage companies and cost millions.
A big part of the salvage plan to remove the wreck calls for 30 watertight boxes, called cassions, to re-float the ship in one piece. Once the ship has been stabilized, caissons will be fixed to the upper side of the hull and gradually filled with water as part of the operation to right the ship.