Ship resistance is an important factor in ship design. Technological developments are carried out to reduce the magnitude of the ship's resistance. By reducing the drag of the ship, it can improve the performance of the ship with the same engine power as the previous design. In this study, we will redesign the hull of the Indonesian Navy's unmanned vessel in order to increase the performance of the ship's speed. The process of redesigning the hull of this unmanned ship uses the numerical method using Maxsurf software in analyzing hydrodynamic performance. The results of the drag analysis carried out with a redesign show a decrease in the value of the ship's resistance by 1143 KN and the required power of 9.98 HP. From the results that this study obtained compared to the initial design of 60%.

The Indonesian Navy's current unmanned vessel is the first unmanned ship made by the Indonesian Navy's Research and Development Service. This vessel is not optimal, it is necessary to redesign the hull using the model simulation method with the assistance of Maxsurf software. By using this maxsurf software, it will be easier to analyze hydrodynamic performance, one of which is the vessel's resistance. The redesign shows the results that there is a reduction in ship resistance. By redesigning, the hull of the Indonesian Navy's unmanned vessel by using the model simulation method with the assistance of the Maxsurf software in analyzing hydrodynamic performance, we get the resistance value at maximum speed. Meanwhile, the power required by the ship is at maximum speed so that the speed shows an increase in maximum ship speed, thereby fulfilling the operational requirements and producing good maneuverability. Therefore, it can be concluded that the ship after being redesigned can be better.