Coflexip Stena Offshore has announced the approval of an upgrade of the CSO Constructor, which will allow the group to offer its clients a heavy duty subsea construction vessel, capable of rigid or flexible pipelay in deepwater. This investment, to exceed $30 million, will significantly expand the capabilities of the CSO Constructor. The hull and the deck will be lengthened by 49 ft. and widened by 16 ft. to bring its pipeline payload to 3,000 metric tons.