Analysis of roll damping model scale data

Having an accurate prediction of ship roll damping is crucial when analysing motions. In this paper, the simplified Ikeda method (SI-method) compared with original method. The methods are using results from a database decay tests carried out on modern merchant ships and smaller set predictions in which was used. It found that most had dimensions outside limits SI-method. Thus, SI-method showed poor agreement model its but acceptable for within limits. deviations were caused by extrapolation errors wave-damping Two ways to improve accuracy proposed based regression, gave about same as