Recent severe storms in the U.K. North Sea have resulted in a number of floating production, storage and offloading vessels (FPSOs) being shut down in order to assess and repair the damage caused. Notwithstanding the possible safety implications for operations crew, oil and gas majors are facing weeks, if not months without a critical asset which in turn, is having a significant impact on future production. The design and operation of an FPSO in remote locations requires detailed information on the structural response of the vessel within the local environment offshore.