This is what the Hull Vane looks like below the waterline of a superyacht.
The patented Hull Vane is a hydrofoil-like appendage fixed to the transom of a vessel and generates hydrodynamic lift. This lift is angled forward, and therefore has a horizontal component pushing the vessel forward. The energy saving device reduces the required propulsion power and therefore the fuel consumption.
Watch an animated video of what the Hull Vane looks like underwater. The picture at the top is a still from the same video.
