The introduction of the IACS Common Structural Rules for Bulk Carriers and Oil Tankers (CSR BC & OT) makes support from advanced rule calculation tools more important than ever. The latest releases of DNV GL’s integrated calculation tools Nauticus Hull and Sesam GeniE offer designers and yards increased calculation speed and efficiency in design, CSR BC & OT rule calculations and the approval process. “We were one of the first classification societies to integrate support for the common structural rules into our tools,” says Vebjørn J. Guttormsen, Head of Section Calculation Tools at DNV GL – Maritime. “Since then, our tools have been used successfully in many newbuilding projects by yards and designers, especially in Korea, China and Japan, and the new versions build on this experience.