CFD-based hydrodynamic analyses of ship course keeping control and turning performance in irregular waves

Ship manoeuvrability studies are usually carried out in calm and regular seas; however, an irregular sea state can better present the real operational conditions at sea, compared to both seas. In this study, of a well-known benchmarking ship was investigated using fully nonlinear unsteady RANS model. The JONSWAP spectrum used generate long-crested seas with significant wave height 5m peak period 12.4s full scale, representing 6. Comparisons were also made view identifying changes manoeuvring characteristics ship. generated waves characterised by equivalent average applied work. is equipped single propeller semi-balanced horn rudder, simulated actuator disk model based on body force method. analysing correlations between waves, findings study have demonstrated that may cause substantial course keeping capability turning performance when inherent qualities water. It expected results work provide deeper insight into as well help masters navigation officers decision-making for handling actions states.