Modeling trajectory characteristic of moor-less buoy system under ocean current

To realize moor-less buoy which keeps position on the deep sea without an anchor, the moor-less buoy system was proposed [1]. The system adopted `Wave Glider' [2] as a propulsion unit, which could make thrust by ocean wave energy without extra energy like battery. However, there are always a risk to be swept away by ocean current, because ocean wave and ocean current are irregular. In this paper, we proposed theoretical motion modeling, and analyzed the characteristic of trajectories of the system along wave power under the current condition.