Experiments are conducted in a DW offshore basin to study the coupled dynamics of a FPSO with mooring and riser systems. It is revealed that the surge motion response of the FPSO is significantly higher under non-collinear environment. Influence of risers on the extreme motion response of the FPSO system is examined. Viscous damping contribution of the FPSO model and the truncated mooring lines and riser systems are obtained. Experimental data obtained in this study can be used as benchmark for future numerical and experimental study.