This chapter explains how transfer functions (i.e., linear responses to regular waves) for hull pressure oscillations can be determined in strip methods more accurately than by the standard procedure, by eliminating second derivatives (“m terms”) of the steady potential. For multi-body vessels (catamarans, etc.), a pressure formula is given which takes account also of the interaction waves between the hulls. Further, the chapter deals with computing relative motions between water (especially the water surface) and ship-fixed points including the disturbance of incoming waves by the ship; with forces and moments in cross sections of the hull girder; and with the wave- and motion-induced vertical water motion in a moonpool (a vertical channel in certain marine structures).