Abstract: A system for controlling movements of a marine surface vessel includes a hull, a bow and a stern. A control unit being controls movements of one or more fins, which control movements of the vessel, in dependence on signals from a position input device, and on signals from a position detecting device. The fin(s) is connected to a respective actuator via a rotation shaft adapted to protrude from the vessel hull, wherein the rotation shaft defines a rotational axis of the fin. Each fin comprises a fin base adapted to be at a first distance from the hull, and a fin tip adapted to be at a second distance from the hull, which second distance is larger than the first distance, wherein a leading edge of the fin, and a trailing edge of the fin extend on opposite sides of the fin, from the fin base to the fin tip.

Abstract: The invention relates to an adjustable device, pivotally arranged about a pivot axis by means of a rotating electric motor having a rotor and a stator via a reduction gearing for reducing the rotation of the motor to an adjustment movement of the adjustable device, wherein the reduction gearing is a planetary gearing, the axis of the electric motor is coaxial with the axis of the reduction gearing and with the pivot axis of the adjustable device and the reduction gearing and the electric motor to form a compact construction.

Abstract: The invention relates to an adjustable device, pivotally arranged about a pivot axis (230, 230a, 230b) by means of a rotating electric motor (213) having a rotor (215) and a stator (216) via a reduction gearing (214) for reducing the rotation of the motor to the adjustment movement of the adjustable device (4a, 4b, 104a, 104b), wherein the reduction gearing (214) is a planetary gearing, the axis of the electric motor (213) is coaxial with the axis of said reduction gearing (214) and with the pivot axis (230, 230a, 230b) of said adjustable device (4a, 4b, 104a, 104b) and the reduction gearing (214) and the electric motor (213, 213a, 213b) to form a compact construction.

Abstract: A wakesurfing boat for creating a wave suitable for surfing in the wake of the boat. A length to beam (L/B) ratio of 3.21 combined with a rounded hull bottom proximate the transom minimizes losses in the wake wave. Elliptical arcuate portions extending from starboard and port points on the transom to selected positions on the respective starboard and port bulwarks further minimize losses in the wake wave. The hull bottom defines an M-shaped portion and a V-shaped portion. A propulsion system includes an exhaust pipe projecting from the hull bottom below the waterline, with an exhaust opening forward of the transom. A propeller has a hub and at least three blades. A blade area, defined by a sum of the area of the blades, is larger than 70% of a disk area, defined by a sum of the hub and the blades.

Abstract: A wakesurfing boat for creating a wave suitable for surfing in the wake of the boat. A length to beam (L/B) ratio of 3.21 combined with a rounded hull bottom proximate the transom minimizes losses in the wake wave. Elliptical arcuate portions extending from starboard and port points on the transom to selected positions on the respective starboard and port bulwarks further minimize losses in the wake wave. The hull bottom defines an M-shaped portion and a V-shaped portion. A propulsion system includes an exhaust pipe projecting from the hull bottom below the waterline, with an exhaust opening forward of the transom. A propeller has a hub and at least three blades. A blade area, defined by a sum of the area of the blades, is larger than 70% of a disc area, defined by a sum of the hub and the blades.

Abstract: An arrangement for dynamic control of running trim, list and/or yaw of a boat, having a housing member comprising a front plate a and rear plate, an interceptor member, an actuating means, a drive unit, and a guiding arrangement, arranged to guide said interceptor member between a first position and a second end position, said actuating means being arranged to displace said interceptor member in a movement between said first and second positions in relation to said housing member wherein said guiding arrangement has a first guiding member and a second guiding member arranged to interact with each other to provide a parallel movement of said interceptor member in relation to said housing member, said first guiding member being a torque transferring, rotatable element having a base body arranged to extend transverse to the direction of displacement of said interceptor member.

Abstract: An arrangement for dynamic control of running trim, list and/or yaw of a boat, having a housing member comprising a front plate a and rear plate, an interceptor member, an actuating means, a drive unit, and a guiding arrangement, arranged to guide said interceptor member between a first position and a second end position, said actuating means being arranged to displace said interceptor member in a movement between said first and second positions in relation to said housing member wherein said guiding arrangement has a first guiding member and a second guiding member arranged to interact with each other to provide a parallel movement of said interceptor member in relation to said housing member, said first guiding member being a torque transferring, rotatable element having a base body arranged to extend transverse to the direction of displacement of said interceptor member.