The turret mooring system consists of a turret assembly that is integrated into a vessel and permanently fixed to the seabed by means of a mooring system. The turret system contains a bearing system that allows the vessel to rotate around the fixed geostatic part of the turret, which is attached to the mooring system. The turret system can be located externally or internally with respect to the vessel hull structure.
The turret mooring system is combined with a fluid transfer system that enables connection of (subsea) pipelines to the vessel like an F(P)SO. The fluid transfer system includes risers between the pipeline end manifold (PLEM) at the seabed and the geostatic part of the turret. In the turret a swivel provides the fluid transfer path between the geostatic part and the free weathervaning vessel that rotates around the turret.