Abstract
Simple evaluation method of fluid resistance on the hull with roughness is demanded in optimum ship management. In this study we replaced the three dimensional irregular roughness by the "set of multi-dispersed cone model" (SMCM) characterized by the pdf of peak heights 3fpeak. Bayes estimation of 3fpeak from the simple inline measurement of roughness curve has made. We also proposed the pressure drag of three dimensional roughness based on the SCM model. The applicability and limitation were discussed based on the comparison of model estimation and measurements.
