As for the calculation of hydrodynamic derivatives for sway and yaw of high-speed ships, Chapman's theory is known as a powerful method. It is also recognized, however, that his method can not be applied to the usual ship-like body, because his numerical procedure is based on the finite difference method. Therefore it is necessary to consider an extension of Chapman's method to the usual ship-like body. In the previous paper, a new method using Fourier transform technique was described and computational results were also presented. Furthermore, the relations between the cross-sectional forms and the forward-speed effect on hydrodynamic forces were investigated. In this paper the author presents the integral equation method which is considered to be an extension of Chapman's method. The integral equation method is applicable to the usual ship-like body and coincides with Fourier transform method for the case of the uniform cylindrical body. These facts may be confirmed by the computational results. Through the comparison of theoretical calculations with experiments of a Wigley ship model, the usefulness of the integral equation method is discussed
