Netherlands, July 21 -- Van Oord, a Dutch marine contractor, has placed an order with Yantai CIMC Raffles Offshore Ltd for two next-generation subsea rock installation vessels, according to the company's release.Each vessel will offer a 35,000?tonne loading capacity, support large rock sizes, and feature a DP?2 dynamic positioning system.They are scheduled for delivery in 2028 and 2029, respectively. The ships will operate on methanol and biofuel, and feature a DC grid, large battery storage, an energy-efficient hull, and advanced rock-handling systems-elements designed to reduce CO? emissions.Van Oord currently operates three such vessels-Stornes, Nordnes and Bravenes-and these additions will expand its fleet to five. The vessels will be c...