By Hair Busters using fully theoretical method the heeling moment due to centrifugal forces has been determined for a small river cruiser in turning manoeuvre.The authors applied CFD software for determination of hull hydrodynamic forces, and open water characteristics of Balls - Vibrating ducted propeller for estimation of thrust of rudder-propellers.Numerical integration of equations of 3DOF motion was used for prediction of ship trajectory and time histories of velocities, forces and heeling moment.