The maneuverability of a new 10,000-ton class river-sea direct vessel designed for the Three Gorges new navigation channel is investigated in this paper,with the objective of enhancing a ship motion simulation platform that incorporates the hydrodynamic characteristics of inland waterways.Numerical simulation methods are combined with circulating water channel resistance tests to analyze the hydrodynamic derivatives for ship roll and yaw under varying water depths and motion frequencies.By the maneuvering modeling group model,a 3-degree-of-freedom maneuvering motion simulation platform is developed for the 10,000-ton class river-sea direct vessel.The verification of platform’s reliability is carried out against publicly available large-scale ship model maneuverability test data.The results demonstrate that the vessel’s turning ability,course-keeping,and stopping characteristics all comply with the JT/T 258-2021 Criteria of Maneuverability for Transport Ship in Yangtze River,and the platform’s reliability is validated.The results provide a theoretical foundation for the safe operation of 10,000-ton class vessels in inland waters and offer technical support for the development of inland ship maneuvering simulators.