we discussed some aspects of the modelling of the hydroelastic ship responses such as springing and whipping. It is clear that the problem is still open and no fully satisfactory model exists up to now. This is mainly due to the inexistence of the efficient solutions for seakeeping with forward speed and for slamming. However, we have shown that some progress can be made and relatively efficient procedures can be put in practice in order to have an idea of the order of magnitude of hydroelastic effects. We believe that these methods, combined with the experiments, can be used in ship design with reasonable confidence. There is a long way to go before obtaining the fully satisfactory model of springing and whipping.