In a mooring assembly for a vessel, comprising a moonpool defined in the vessel, a turret is rotatably mounted within the moonpool with an upper main bearing for transmitting horizontal and vertical loads between the vessel and turret and with a lower secondary bearing for substantially transmitting horizontal loads between the vessel and the turret. Mooring lines are attached to the lower region of the turret that comprises a number of circumferentially spaced torsion box like torsion members each extending substantially vertically. The torsion members resist bending in a circumferential direction that is greater than in a radial direction. The lower secondary bearing is defined by outwardly facing bearing members attached to said torsion members and an inwardly facing bearing ring attached to the moonpool. In a situation in which a torsion member is not loaded horizontally by a respective mooring line its bearing member does not engage the ring.