Abstract: Various embodiments of a submerged sailing vessel are disclosed. Such a submerged sailing vessel may comprise a submersible hull assembly, a keel coupled to and extending upwards from hull assembly towards a water surface, and a wind-catching assembly coupled to and extending upwards into the air from the keel for propelling the submerged sailing vessel. The hull assembly and keel are submerged below the water surface as the vessel is propelled by the wind-catching assembly above the water surface.

Abstract: The present disclosure relates to a sailing vessel control device having a cleat means, a resistance means, a line having a first end located through the cleat means and a second end attached to the resistance means, and a sensor adapted to detect the extent to which the line is pulled through the cleat means and to output a line signal corresponding to the position of the line for use in controlling the sailing vessel. The line signal which can be used to control the sail(s) of the vessel can be generated in a traditional, manual manner (i.e. by pulling on the line). The present disclosure further relates to a sailing vessel control system having one or more of the sailing vessel control devices, one or more sail actuators, and a control unit.

Abstract: Disclosed is a positioning device for a free-flying kite-type wind-attacked element that comprises a profiled wing, is used as the exclusive, an auxiliary, or an emergency drive unit, and is connected to a watercraft via a traction rope. The positioning device is provided with a winch that encompasses means which cause the traction rope to be taken in when a given first tractive force is not attained and/or when the flow is about to stop or has stopped abruptly and/or cause the traction rope to be veered when given a second tractive force and/or a given inflow velocity are/is exceeded.

Abstract: A sail rig for a wind driven craft comprising a rotatable gantry mast adapted to support one or more sails within the gantry and a support structure connected to said mast to rotate therewith and which carries an aft sail attachment boom which is pivoted to the support structure at a first end and provided with means for attachment to the clew of the sail or one of the sails at its second end, and a means for controlling the relative angle of the attachment boom in relation to the supporting structure.