on floating vertical circular cylinder due to diffraction and radiation are presented here. The
boundary value problem (BVP) is solved in terms of diffraction potential and three potentials
due to radiation, two translational motions about x-axis (surge) and about z-axis (heave),
one rotational motion about y-axis (pitch). The analytical expressions for the hydrodynamic
coefficients, displacement-amplitude ratios and loadings for this case were obtained …