3 ft Gurindam Unmanned Surface Vehicle (USV) showed unmaximal performance when it tested on the water. Uncalm movement, unmaximal speed indicated that something need to be checked and make sure to the USV so that it can maximize the performance. The USV is owned by Politeknik Negeri Batam, it’s 3 feet long, with single hull type, fuel engine motor and almost 8kg weight. This research aims is to get the stability analytical data so that the researche can collected some data which is will used to maximize the USV performance. From the research it can concluded that the USV has a maximal GZ 9,56cm at 48.2 deg in mimimal weight and maximal GZ 8.88cm at 48.2 deg at the maximall weight of the ship. From this result, it can concluded that the more weight added on the fuel tank (front position) the more unstable condition of the ship. Or, it’s need a fixed ballast on the AP area to get the more stability on the USV. Hopefully this reasearh followed by the owner and tested so that the performace of the ship will be maximal.
 
