Societe D'Ingeniere de recherches ET D' etudes En Hyrodynamique Navale par (SIREHNA) is a company that develops naval equipment for the civil and military markets. Its products include an unmanned surface vehicle (USV), collision avoidance and dynamic positioning (DPS), maritime optronic surveillance (MOS), aviation course predictor (ACP), etc. The company offers hydrodynamic design and optimization, numerical towing tank simulation, ship model testing, and engineering services.