Since 1990, Océanide performs physical model testing in its flume or its shallow water tank for public local authorities within coastal developments and / or waterfront protection and private companies within coastal projects. With more than 100 tests campaigns performed to date, Océanide is one of the main French actors in the physical modelling of coastal structures and coastal phenomena. Performing tank tests on physical models aim at verifying the stability of these structures in a given marine environment, and assessing their performance in terms of protection, stability, overtopping, reflection, transmission or environmental impact in view of a possible optimization of the project. The combination of these two facilities, a flume and a shallow water tank, allow our clients to assess the hydraulic performance of one or more sections (2D) of a concept in the flume and then to perform a tests campaign in the shallow water tank to account for potential three dimensional effects (3D).