Stability characteristics of catamaran ship model based on the hull shape variation

Small dredger catamaran is a vessel of tin suction is used for tin mining community. Shipbuilding business using a circular catamaran hull have problems such as poor stability resulting in IMO standars of safety operation in the sea. The purpose of this study is to analyze geometry hull of the tin mining equipments to obtain good stability based on minimum criteria of IMO standars. 3 models of small dredger catamaran with geometry hull i.e. circular, rectangular, and oval with variety of configurated catamaran hull ratio length-breath (S/L) on a small dregder catamaran 10 m with scale model 1: 8 are using in this study. The stability experiment is used a inclining test in basin with refer to ICAS 2004 procedure. Comparasion of ship stability with variety of geometry hull is shown on the graph as a fuction of angle of heel. The result showed that stability of small dredger catamaran using a rectangular geometry hull is better to improve the most corecction for ship stability could achieve 16 – 23 % base on minimum IMO standar.