A motorised outrigger stabilised watercraft comprising a main hull extending in a fore-aft direction, a single outrigger arranged to stabilise the main hull, extending substantially parallel to the main hull and spaced laterally from the main hull, and at least one hydrofoil located at or proximate the stern of the main hull.

A rowing machine convertible for use both indoors and outdoors. In the outdoor mode, the rowing machine is configured for adaptation to a watercraft, such as a kayak or stand up paddle board (SUP). A rower operating the rowing machine pulls on a rope or cord to cause paddles positioned at the rearward end of the machine to rotate and move the machine on a body of water. In the indoor mode, legs are attached to the machine for placement on a rigid surface. The paddles are placed in a container holding fluid.

The invention pertains to a Pacific prao-type amphidromic multihull vessel (100), comprising a hull (101) and a float (102) parallel to the hull, the float and the hull being linked by a beam (130) the hull carrying a Flettner-type rotary rigging (111, 112) capable of producing a thrust perpendicular to both its spinning axis (110) and a wind direction (180), that in absence of wind is heeled by an angle ? toward the float. The invention also pertains to a system implementing such a vessel for collecting windpower into a storage battery housed in the float as well as a method for boarding and disembarking such a battery.

A canoe outrigger with built-in, covered, storage capacity. Unlike a typical pontoon type outrigger, this device is a miniature canoe form that has an open interior. The top of the outrigger has three doors allowing for storage and access within the form that holds many supplies, such as camping and fishing gear, food, water and other items. The outrigger is connected to a canoe, or other small boat, by a pair of telescoping arms. Each arm has clamps that secure the arms the gunwales of the vessel. The other end of each arm is bolted into position on the outrigger. In this way, the outrigger is securely attached for use.

A variety of multi-use, configurable watercraft is disclosed. A first type of watercraft used in a first water-based activity may be used as a component in a second type of watercraft used in a second water-based activity. For example, a stand-up paddleboard (SUP) may be used for paddle boarding, and then converted into a kayak, sailboat, catamaran, motorboat, or other type of vessel by adding one or more components to the SUP. In one embodiment, two paddleboards are used to construct a variety of multi-hull watercraft.