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The sitting state of a sunken ship is usually related to the water depth, ship type, damage position, deadweight, and weight and density of the cargo. In salvage operation different means must be adopted according to the sitting state of the sunken ship to make the ship refloat. Refloating a big-angle tilted sunken ship is difficult, and uprighting a ship underwater is the most complicated procedure in salvage operation. This paper, based on practical experiences, systematizes and presents the calculating methods of uprighting sunken ships underwater.
The sitting state of a sunken ship is usually related to the water depth, ship type, damage position, deadweight, and weight and density of the cargo. In salvage operation different means must be applied according to the sitting state of the sunken ship to make the ship refloat. Refloating a big-angle tilted sunken ship is difficult, and uprighting a ship underwater is the most complicated procedure in salvage operation. This paper, based on practical experiences, systematizes and presents the calculating method of uprighting sunken ships underwater.