A double-chamber inflatable paddle board with detachable function includes an outer chamber, an inner chamber and a fixing connector strip. The outer and inner chambers are independent chambers. A middle portion of the outer chamber includes an opening with an accommodating cavity that matches the inner chamber. One side of the fixing connector strip is fixedly connected to one of an inner edge of the outer chamber and an outer edge of the inner chamber, and the other side is suspended. In an inflated state, the other side of the fixing connector strip is engaged on one of the outer edge of the inner chamber and the inner edge of the outer chamber, to cooperate with the connected chamber to form an inflatable paddle board product with flat surface. The inner and outer chambers are detachably connected into one piece through the fixing connector strip.

A swim platform for attachment to a boat includes a rearwardly tapered inflatable body including a top surface capable of supporting a standing person, an outer perimeter including a forward wall, an aft wall, and a port sidewall and a starboard sidewall extending between the forward wall and aft wall. The forward wall is positionable adjacent the transom. The forward wall is longer than the aft wall and is configured not to extend laterally beyond the starboard and port sides at the transom. The swim platform may be left in the water while the boat is moving and is designed not to interfere with the boat's wake.

Accessory mounting systems for stand up paddle boards are disclosed. In one example, the accessory mounting system includes a mounting plug secured to a stand up paddleboard, a accessory plate secured to the mounting plug, and one or more accessories secured to the accessory plate. In other examples, the accessory plate is provided with an adhesive backing and can be mounted and secured to the stand up paddle board, thereby allowing the accessory mounting system to be used on boards not having mounting plugs and/or at locations where mounting plugs are not present. In yet another example, a mounting track is provided instead of a accessory plate such that one or more accessories, such as fishing rod holder, can be slidably mounted on the stand up paddle board.

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 method of making an aquaplane is provided. The method includes flattening a fabric layer and a bottom layer with a waterproof characteristic, where the pull-string layer has a first pull-string layer, a second pull-string layer and multiple pull lines, one end of the pull line holds the first pull-string layer, and the other end of the pull line holds the second pull-string layer; using a roller laminates the fabric layer, the pull-string layer and the bottom layer, where a portion surface of the fabric layer and the bottom layer are melted, and respectively mixed with the surface gluing of the first pull-string layer and the second pull-string layer to produce a fixed microstructure; and cutting a shape of the aquaplane from the lamination of the fabric layer, the pull-string layer, and the bottom layer.

An inflatable structure that includes continuous longitudinal and axial curves, constructed to form a hydrodynamically designed performance platform for use as a performance water sports board, rescue board, or rescue sled, such as a stand-up paddle board, paddleboard, surfboard, PWC rescue sled, bodyboard, or other floating or dynamic platform. Alternatively, it may be adapted for use with additional structure to provide an inflatable hull and floor for a watercraft, such as a boat, raft, life-raft, rescue craft, or other floating or dynamic platform. Longitudinal stringers welded to opposing panels defining the interior volume of the inflatable structure are joined by welding, gluing, or lashing, and the shape of the stringers and the welding/gluing/lashing schedule can be employed to give the inflatable structure a highly customized curved shape.

An inflatable board for water sports such as surfing, windsurfing and kite surfing uses at least one cord for stiffening. The cord is arranged to be placed in tension upon inflation of the board, and acts to brace the board in use.

Accessory mounting systems for stand up paddle boards are disclosed. In one example, the accessory mounting system includes a mounting plug secured to a stand up paddleboard, a accessory plate secured to the mounting plug, and one or more accessories secured to the accessory plate. In other examples, the accessory plate is provided with an adhesive backing and can be mounted and secured to the stand up paddle board, thereby allowing the accessory mounting system to be used on boards not having mounting plugs and/or at locations where mounting plugs are not present. In yet another example, a mounting track is provided instead of a accessory plate such that one or more accessories, such as fishing rod holder, can be slidably mounted on the stand up paddle board.

Disclosed is a stand-up paddle board comprising an inflatable body having a top face, an opposing bottom face, and a periphery extending between the top face and the bottom face. The inflatable body includes dimensions that enable the stand-up paddle board to track straight and turn responsively in flat water. The stand-up paddle board also comprises a detachable and adjustable securing arrangement provided to the top face of the inflatable body and configured to secure cargo to the top face.

An additional chamber to watercraft that adds both volume and curvature to other compartments or components of the watercraft that are essentially flat is described. The additional chamber provides for modular construction of watercraft for creating volumetric space as well as a curved surface to the outer portion of the watercraft. The chamber advantageously increases the aesthetic appeal of the watercraft as well as provides a surface on which water is discouraged from pooling or collecting on. Various watercrafts having such a chamber are also described.