The last chapter is devoted to model tests. The basic principles of model testing are first presented, that is the Froude scaling law, and the issued related to the biases in Reynolds number. A review is made of experimental facilities used in ocean engineering, and of the wave generation and absorption principles. Issues related to confinement effects, such as sloshing, seiching, Benjamin-Feir instability, emission of free harmonics, etc., are extensively covered. Recommendations are made on specifications and exploitation of model tests.

Chapter 5 is mainly devoted to the interaction between waves and immersed bodies. In general, an immersed body may oscillate in six different modes, three translating modes (surge, sway, heave) and three rotating modes (roll, pitch, yaw). An oscillating body radiates waves, and an incident wave may induce a corresponding excitation force for each one of the six modes. When a body oscillates, it radiates waves. Such radiated waves and excitation forces are related by so-called reciprocity relationships. Such relations are derived not only for a single oscillating body but even for a group (or 'array') of immersed bodies. Axisymmeric bodies and two-dimensional bodies are discussed in separate sections of the chapter. Although most of this chapter discusses wave-body dynamics in the frequency domain, a final section treats an immersed body in the time domain.