MIMOSA software analyses mooring systems and moored vessels, as e.g. turret moored ships and deepwater floaters for production. It uses efficient frequency-domain techniques to calculate wave frequency and low frequency vessel motions and mooring tensions. MIMOSA is up-to-date with respect to all calculations required by the American Petroleum Institute (API) for approval of positioning systems, e.g. calculation of slow drift, line dynamics and transient motion.