Here, as per the Froude-Krylov force, the horizontal force given by equation 19 a will be a product of some kind of a flow coefficient, which may be determined or given to you by through experimental published literature through experimental investigations. And that will be equal to f into f suffix k x of k. And similarly, the vertical force is given as shown here. The moments or cost by these two forces, at point o which is at this location.