The need for a more realistic prediction of the ship manoeuvres has stressed the importance to incorporate wave effects in mathematical manoeuvring models. Wave effects are not only restricted to open sea; also in coastal areas, considering the important influence of shallow water and the lateral restriction in access channels, the incorporation of such effects is of critical importance. Up to date, several methods have been proposed to simulate manoeuvring in waves and a limited number of experimental research has been performed. Considering this, the present experimental study extends the discussion on the wave induced phenomena on a manoeuvring ship. In this article the focus is put on model tests designed for gentle manoeuvres in restricted areas, for instance ship entrance to ports. The investigation comprises captive manoeuvring tests in calm water and in regular waves for two different water depths.
In addition, the limitations regarding such experiments and the discussion of the superposing principle used in most of the theoretical works are presented. The superposition principle is investigated using numerical results obtained from Hydrostar.