The propulsion improving device, especially for full block ships, developed by Professor Schneekluth. It consists of two nozzle-shaped halfring ducts installed on both sides of the stern ahead of the propeller. The duct accelerates the flow into the top half of the propeller plane and slow it down slightly in the lower part, thus achieving a more homogenous wake-field.
LNG gas carrier INIGO TAPIAS is fitted with Schneekluth Hydrodynamic wake ducts to improve aft water flow and enhance the propeller performance.