...; wave-blocking threshold; nonlinear dynamical system theory; free-running model tests; irregular seas. INTRODUCTION When a vessel runs in following and quartering seas, there exists danger of broaching-to (Renilson et al. 1982) (Umeda 1999). This phenomenon is relevant to ships having Froude number...

... that of directional stability and course keeping of fast monohulls. Tools for assessment were up to now model tests and CFD. In itself these are great tools, but in early design stage they are often perceived too elaborate. Design verificataion on the other hand is often carried out using model testing stage...

... reliability. Because SPP is unusual propeller having above difficulty of the performance estimation, the studies for SPP are few compared with large sized propellers for merchant ships. Although the various model tests had been carried out to understand the physical phenomena around various SPPs...

... Seakeeping performance of a planing boat should be sufficiently considered and evaluated at the design stage for its safe running in rough seas. Model tests in seakeeping model basins are often performed to predict the performance of full-scale planing boats. But, there are many limitations...