Power Take Off.
After a work stroke the unit has to return to its starting position for the next work stroke. Usually this cost a lot of energy, making a normal buoy with the same (small) counter weight rather ineffficient. But the blades of the Slow Mill, designed to be driven back by the returning wave, restore the unit to its starting position, greatly enhancing effficiency. Wave energy is unevenly distributed with high peaks and large gaps, thus the Slow Mill is equipped with unique energy storage features to provide high quality predictable power.