There is a probe dragging in water at the front of the boat: http://www.sailmagazine.com/learning-fly-0 http://www.sailmagazine.com/learning-fly-0 When the boa

There is a probe dragging in water at the front of the boat: http://www.sailmagazine.com/learning-fly-0 http://www.sailmagazine.com/learning-fly-0 When the boat is too high, the probe goes out of water and automatically adjust the foil angle to lower the boat.