Abstract: A sailing vessel having the performance capabilities of a multi-hull craft with the superior stability of a ballasted mono-hull craft, comprising a central hull supporting a mast and a pair of lateral hulls substantially parallel to the central hull and connected thereto by arms which are pivotably connected to the central hull such that each arm can pivot about an axis substantially parallel to the longitudinal axes of the hull. Springs act between the central hull and each of the arms such that pivotal movement of each arm is only possible against the bias of the spring. Excessive wind loading is thereby shed from the sail by the mast and the central hull pivoting relative to the lateral hulls.