A numerical analysis is undertaken with the aim to assess the sea-keeping characteristics of a high-speed multi-hull vessel, both in head and oblique waves. The geometry under investigation is the Delft catamaran 372, which has been tested experimentally both in towed and free running conditions. The numerical analysis is carried out following an unsteady RANS approach, using the code CFDSHIP-Iowa V.4.5. Preliminary results for captive simulations in head waves show good agreement with EFD data. The text includes extensive discussions of RAOs in waves for Fr=0.3 and 0.75 and wave heading of 0° and 45°. Results also include time histories of ship motions and resistance both in head and oblique waves.
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