We developed an oceanic energy harvesting robotic buoy system that can hold position automatically without anchoring line. The points we aimed at are survivability and energy harvesting for long term operation. the concepts we propose are as follows:

  1. Moor-less, autonomous position hold,

  2. Renewable ocean energy harvesting for the persistent buoy operation,

  3. Evasive maneuver by diving.

We developed made a prototype of the proposed system for experiment to test its station-keeping ability and energy harvesting power. The developed system patrolled within a 10 m diamete4r area and generated 1 W electricity power. In this paper, concept description and preliminary study for development of the robotic buoy are presented.

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