A horizontally submerged passive flapping foil can generate thrust force against the wave propagation using wave energy. This renewable method has been used for the design of propulsion and maneuvering systems of ships and other floating structures. Recently. the passive flapping foils were applied to design the station-keeping system of deep-water floaters. https://www.ealisboa.com/great-deal-Pentair-Union-Collar-2-U11-200PS-super-offer/