The purpose of the Coast3D project is to improve understanding of the physics of coastal sand transport and morphodynamics, to remedy the present lack of validation data of sand transport and morphology suitable for testing numerical models of coastal processes, to test a representative sample of numerical models for predicting coastal sand transport and morphodynamics against this data, to deliver validated modelling tools, and methodologies for their use, in a form suitable for coastal zone management, to deliver a set of guidelines for practical coastal zone management. The Coast3D project was funded by the European Commission's research program under contract number MAS3-CT97-0086. See also the Coast3D website.