|The CSO Deep Blue is the world's largest purpose-built ultra deepwater pipelay and subsea construction vessel. It can lay flowlines and umbilicals, and support developments in water depths ranging from 75m to 2,500m.|
The CSO Deep Blue has an overall length of 206.5m and a moulded breadth of 32m. It has a moulded depth of 17.8m and an operating draught of from 7.5-8.95m, with a 10m maximum of draught. It has a 55,234t displacement and is 33,791gt. The upper deck aft of moonpool can withstand loading of 14lb/in². Loading for the moonpool covers is 4lb/in² and the rest of the upper deck is 7lb/in². It has a free deck area (aft of the moonpool) of approximately 7,400ft².