A water sports device is provided which is configured for self-stabilization. The water sports device includes an active stabilization means, in the case of which the control unit provides control signals for actuators of the water sports device, actuators being active adjusting means. These can be a motor of the propulsion apparatus, adjustable flaps or nozzles, or adjustable fins, rudders, hydrofoils or individual adjustable sections thereof. Input data such as data about the position of the water sports device, power output of the propulsion apparatus, speed, acceleration and/or user inputs are evaluated in the control unit, and control commands for an actuator or a plurality of actuators are generated.

A water sports device is provided which is configured for self-stabilization. The water sports device includes an active stabilization means, in the case of which the control unit provides control signals for actuators of the water sports device, actuators being active adjusting means. These can be a motor of the propulsion apparatus, adjustable flaps or nozzles, or adjustable fins, rudders, hydrofoils or individual adjustable sections thereof. Input data such as data about the position of the water sports device, power output of the propulsion apparatus, speed, acceleration and/or user inputs are evaluated in the control unit, and control commands for an actuator or a plurality of actuators are generated.

A water sports apparatus is provided, and includes a propulsion device which is provided for the propulsion of the water sports apparatus and whose motor, arranged on the float-body side, is connected in terms of drive to at least one propulsion element via an angularly and/or longitudinally movable propulsion train. The angularly and/or longitudinally movable propulsion train allows the propulsion element to be positioned optimally on the body-of-water side. The motor is arranged in a region which does not cause any body-of-water-side resistance in the operating position with a float body lifted off from the water surface. That part of the water sports apparatus which is situated in the water is optimized with regard to the design which is relevant to flow resistance in the water.

A water sports apparatus is provided, and includes a propulsion device which is provided for the propulsion of the water sports apparatus and whose motor, arranged on the float-body side, is connected in terms of drive to at least one propulsion element via an angularly and/or longitudinally movable propulsion train. The angularly and/or longitudinally movable propulsion train allows the propulsion element to be positioned optimally on the body-of-water side. The motor is arranged in a region which does not cause any body-of-water-side resistance in the operating position with a float body lifted off from the water surface. That part of the water sports apparatus which is situated in the water is optimized with regard to the design which is relevant to flow resistance in the water.

A water sports device is provided in which a propulsion device has at least one sensor arrangement which is usable for position determination. A control unit of the water sports device is designed for generating control signals on the basis of signals from the sensor arrangement for the purpose of geofencing and/or homing. One or more controllable elements of the water sports device are activated by means of the control signals. Such elements may include a motor of the propulsion device, movable means for generating an alignment of a water jet (e.g. a wing, motor, rudder blade, a fin and/or nozzle), and/or retractable and extendable elements (a centerboard, a holding and/or hydrofoil device) which influence the floating properties of the water sports device.

A water sports device is provided in which a propulsion device has at least one sensor arrangement which is usable for position determination. A control unit of the water sports device is designed for generating control signals on the basis of signals from the sensor arrangement for the purpose of geofencing and/or homing. One or more controllable elements of the water sports device are activated by means of the control signals. Such elements may include a motor of the propulsion device, movable means for generating an alignment of a water jet (e.g. a wing, motor, rudder blade, a fin and/or nozzle), and/or retractable and extendable elements (a centerboard, a holding and/or hydrofoil device) which influence the floating properties of the water sports device.

A system for retracting a foil of a watercraft in the event of an impact has a strut extending from a watercraft, the strut has a pivot at one end that connects the strut to the watercraft and allows the strut to articulate around the pivot, a foil attached at a second end of the strut, wherein the foil has sufficient surface area configured to generate positive lift when the watercraft is traveling over water; and a retraction system including a mechanical fuse connected to the strut, the mechanical fuse holds the strut stationary and is subject to forces from the strut when the strut travels through water, the retraction system allows retraction of the strut around the pivot when the strut experiences a force greater than a predetermined limit, and the foil is configured to articulate on the strut to maintain positive lift orientation as the strut is retracting.

A holding apparatus is provided by way of which a hydrofoil surface apparatus can be retracted and extended and/or folded, out of a rest and/or starting position into its operating position and/or out of the operating position into the rest and/or starting position. Such actuation can take place manually by way of a person operating the water sports device, with the advantage of simpler transportability of the water sports device. The water sports device can already be placed in water close to the bank or beach, and can be guided or moved from there in the direction of deeper water. As soon as sufficiently deep water is reached, the hydrofoil surface apparatus can be transferred via the holding apparatus into the operating position.

A holding apparatus is provided by way of which a hydrofoil surface apparatus can be retracted and extended and/or folded, out of a rest and/or starting position into its operating position and/or out of the operating position into the rest and/or starting position. Such actuation can take place manually by way of a person operating the water sports device, with the advantage of simpler transportability of the water sports device. The water sports device can already be placed in water close to the bank or beach, and can be guided or moved from there in the direction of deeper water. As soon as sufficiently deep water is reached, the hydrofoil surface apparatus can be transferred via the holding apparatus into the operating position.

A retaining device of a water sport device has a drive, which is preferably designed as an electromechanical or electropneumatic drive and via which the foil device can be transitioned from a resting and/or starting position into the operating position and/or from the operating position into the resting and/or starting position. The actuation can take place manually by a person operating the water sport device. The water sport device may already be lowered into knee-deep water near the shore or beach, for example, and guided or driven there in the direction of deeper water. As soon as sufficiently deep water has been reached, the foil device can be transitioned into the operating position, which is at a greater distance from the floating body, by means of the drive. This process can take place automatically when a specifiable or set water depth has been reached or by the release on the part of the person using the water sport device.