The manoeuvring characteristics of high speed craft are greatly influenced by the hydrodynamic loads generated by the asymmetrical underwater hull shape when the vessel heels. In order to provide an insight into this aspect of the manoeuvring of high speed craft, captive model experiments were conducted in the model towing tank at the Delft University of Technology. The experiments were divided in two main phases. In the first phase, the heel-sway, heel-yaw coupled linear coefficients and hydrodynamic heel moment were measured using static heeled model measurements over a range of speeds. The second stage of the experiments examined the influence of different running trim attitudes on the values of the manoeuvring coefficients. The results from three running trim conditions were compared.@en