Hull Vane Comparison in Waves 

Vertical accelerations are the main cause of seasickness. In this video, the effect of the Hull Vane is compared for a yacht with (left) and without Hull Vane (right). The gauges on the top half represent the pitching and heaving motions.
The motions and wave profiles were computed by Van Oossanen Fluid Dynamics using Fine/Marine CFD software.
Hull Vane: improved efficiency & improved seakeeping