The wave basin is used in research studies in which a special focus is placed on three-dimensional processes. In coastal engineering, these are classically the 3D propagation of waves, shoaling and refraction as well as diffraction as in harbour areas. The experimental investigations carried out here include the stability of breakwaters including the critical areas around the breakwater head, coastal erosion taking into account transverse and longitudinal coastal transport as well as investigations on floating offshore wind turbines or on realistically modelled coasts, e.g. taking into account salt marsh forelands or oyster reefs.