turret mooring system according to the present invention the system consists of a cylindrical turret structure 1 located within a cylindrical moonpool 2 integrated into the hull 3 of a vessel 14 which for example could be a fpu or fpso the turret bearing system connecting and aligning the turret to the moonpool of the vessel consists of a large diameter top bogie bearing 4 and optionally a bottom low friction pad radial bearing system 5 a large multi deck superstructure 6 is located on top of the turret 1 and houses installation and production equipment piping manifolds 7 and the fluid gas swivel stack 8 for the incoming production fluids exported fluids and the control chemical umbilicals a steel frame is positioned above and around the superstructure a casing 9 which is connected to the vessel supports the piping extending from the fluid swivel stack 8 to the fpu provides access to the turret 1 from the vessel drives the rotating part of the swivel and supports the wintering panels the turret design allows for maintenance and repair in operation which maximizes its availability over the full field design life the upper end of each anchor leg 10 via which the vessel 14 is moored to the sea bed 15 is directly connected to a low friction articulated universal joint on the hull of a mooring buoy 11 that is seated in a conical cavity 16 at the lower end of the turret 1 risers 12 that are connected to a sub sea hydrocarbon wellhead 15 are with their upper ends connected to a riser deck 17 of the buoy 11 when the mooring buoy 11 is connected to the vessel or fpu the upper end of the buoy is clamped into.