When Engineers Lifted the 17,000-Tonne Sewol Ferry from the Seafloor After resting 40 meters deep for nearly 3 years, the Sewol ferry was finally raised in March 2017 in one of the most complex marine salvage projects ever attempted. Engineers began with debris removal and sealing over 150 openings to keep structural integrity intact. They drained 954 cubic meters of oily water and installed underwater nets to prevent human remains or debris from escaping during the lift. Eighteen giant beams we