The invention relates to a device for adjusting the attachment points of a harness line (2) on a boom (1) for a sail-board or the like. It is in particular remarkable in that it includes a carriage (3) that is mounted sliding inside or outside the boom (1) or in an attached part. The harness line (2) passes through the passage orifices of the carriage (6a-6b) in order to form a loop (4), which allows the user to hang by his harness. The carriage (3) can be locked by an appropriate system. This device makes it possible to correct the position of the loop (4) easily during operation of the sail-board in the water by unlocking the carriage, sliding it and locking it in a new position. The length of the loop (4) can be adjusted by shortening or lengthening the harness line (2) with a clam cleat.

Disclosed are a propelling module and a surfing apparatus having the same. The propelling module includes a module housing, a rotating device, a transmission shaft and a propeller; wherein the module housing is provided with a sealed chamber, the propeller is arranged outside the sealed chamber, the rotating device is arranged inside the sealed chamber, one end of the transmission shaft is connected to the rotating device, the other end of the transmission shaft penetrates through a side wall of the sealed chamber and extends to the exterior of the sealed chamber, and is connected to the propeller; the module housing is provided with a power connection member, and the rotating device is electrically connected to the power connection member, and is configured to be electrically connected to an external device via the power connection member; and the module housing is further provided with a water passage, and the propeller is arranged in the water passage.

The present invention provides a board mountable system for filming underwater video. The inventive board mountable system can be mounted to the underside of water vehicles for incorporating a camera for filming from an underwater perspective. The inventive board mountable system is shaped to minimize drag as a result of the mounted camera or camera system. Embodiments of the inventive system includes a fin shaped housing for holding a camera or camera system. In certain embodiments, the fin is removably attached to the water vehicle, such as a surf board, where the fin housing can be swapped with other fins being used with the water vehicle for controlling the direction of a watersports board in motion. These embodiments of the inventive system further include a connection means for connecting the fin to the underside of a water vessel.

The present invention provides a board mountable system for filming underwater video. The inventive board mountable system can be mounted to the underside of water vehicles for incorporating a camera for filming from an underwater perspective. The inventive board mountable system is shaped to minimize drag as a result of the mounted camera or camera system. Embodiments of the inventive system includes a fin shaped housing for holding a camera or camera system. In certain embodiments, the fin is removably attached to the water vehicle, such as a surf board, where the fin housing can be swapped with other fins being used with the water vehicle for controlling the direction of a watersports board in motion. These embodiments of the inventive system further include a connection means for connecting the fin to the underside of a water vessel.

The present invention provides a connecting device for connecting at least two floating bodies, in particular at least two stand-up paddle boards, side by side, comprising: a linkage having at least one rod; and a plurality of fastening means arranged on the at least one rod of the linkage, at least some of the plurality of fastening means being provided axially displaceable along the axis of the at least one rod of the linkage adapted to the respective geometry of the at least two floating bodies such that each floating body can be clamped between at least two fastening means on the at least one rod of the linkage in a positionally stable manner.

The present invention provides a board mountable system for filming underwater video. The inventive board mountable system can be mounted to the underside of water vehicles for incorporating a camera for filming from an underwater perspective. The inventive board mountable system is shaped to minimize drag as a result of the mounted camera or camera system. Embodiments of the inventive system includes a fin shaped housing for holding a camera or camera system. In certain embodiments, the fin is removably attached to the water vehicle, such as a surf board, where the fin housing can be swapped with other fins being used with the water vehicle for controlling the direction of a watersports board in motion. These embodiments of the inventive system further include a connection means for connecting the fin to the underside of a water vessel.

The invention relates to a volume element (10) comprising at least one inner chamber (12), which is bordered by an at least substantially flexible material and which can be inflated with a gas, and comprising at least one outer chamber (14), which is bordered by an at least substantially flexible material, which is fluidically separated from the at least one inner chamber (12), and which surrounds at least some regions of the outer circumference of the inner chamber (12). Granular material is received in the outer chamber (14) for absorbing pressure forces acting on the volume element (10) from the direction of the outer chamber (14).

A sport amusement device consists of a snowboard like board integrated into a unibody inlet nozzle that accepts a high pressure fire hose. The inlet nozzle pivots and has a quick disconnect collar for the fire hose. The base includes land support columns to enable preparation for launch. A jet ski or other pump powers the fire hose. With horsepower ranges from 80 to 300 the board flies even forty feet into the air and can propel the rider underwater in a dolphin like manner. The board floats. Quick disconnect bindings allow the rider to quickly dismount. The rider's hands are completely free to help balance and steer the board in flight.