Jetten Beach 45. The Beach series from Jetten Shipyard is of an unprecedented class and is constructed in aluminium. The beautiful design of Cor D. Rover in combination with the technical innovations create an entirely new class. The patented Fast Displacement Hull Form (FDHF) from Van Oossanen is the pinnacle in the area of displacement hulls. This revolutionary patented design consumes up to 20% less fuel and simultaneously makes possible higher speeds of up to 22 knots.