Abstract
Ship manoeuvring performance is very important in navigation safety, especially when ships operate in shallow water. This paper describes the characteristics of turning circle and zig-zag manoeuvres of Indonesian ferry ships in shallow water. A time-domain simulation program was developed for this purpose. Several parameters such as ship speed and water depth levels have been considered in the simulation. The results shows a significant difference in the ship’s trajectory and speed when the ship manoeuvring in different water depths. The ship manoeuvre trajectory diameter for shallow water (h/T=1.3) is greater than in deep water (h/T=4.0). Meanwhile, the speed of the ship during turns increases with the decreasing depth of the water (h). Likewise, the 20/20° zig-zag manoeuvre of the ship shows that the heading angle in shallow waters has a smaller overshoot angle when compared to the ship manoeuvres in the deep waters.
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