Diver propulsion devices and methods of propelling the devices and divers upon and beneath the sea are presented. A diver propulsion device is comprised of a wing buoyant in water, an electric motor propulsion system, a leash interconnecting the wing and diver, which leash may integrate control circuitry of the motor, photovoltaics atop the wing, and, batteries, each electrically connecting the motors, fins attaching the wing provide hydrofoil flight stabilization, and foot constraints attaching a deck of the wing. The wing is a hydrofoil, and the diver stands and lies upon the deck of the wing, and, during hydrofoil flight, the diver is substantially above the sea and the wing is seaborne. In hydrofoil flight, the device may be motor propelled, or, by the diver heaving and pitching the device, or, by both methods simultaneously. Undersea, the device tows the diver by motor power energized photovoltaically, and, or, by battery.

The swivel lock quick release device is adapted to selectively attach a user to a sports equipment. The sports equipment may be watersports equipment, such as a surfboard, a kite surfing apparatus, a stand-up paddle board, sailing equipment, a wake board, etc., or land sports equipment, such as fishing, camping, climbing, animal collars or leashes, tactical rifle apparatus, and hunting equipment. The swivel lock quick release device can have a pull release and a protrusion, the pull release and the protrusion being adapted to be selectively engaged in a locked position is provided. A slide handle, a portion of the pull release, is adapted to be selectively moved in a coaxial direction by the user to disengage the pull release and the protrusion. The pull release can also be adapted to rotate or swivel around the protrusion.

A wing, buoyant in water has an upper wing surface comprising a deck upon which a rider stands, and, the wing is in water. A foot constraint proximate the wing leading edge and fixedly attaching the wing projects outwardly from the deck to release-ably receive the rider's forward foot. With the rider standing with both feet upon the deck, and the rider's forward foot ensconced within the foot constraint, and with the rider's aft foot proximate a trailing edge of the wing, the rider bodily heaves and pitches the wing to obtain a chordwise forward velocity thru the water. The forward foot constraint enables the rider to upheave the wing. A second foot constraint may attach the deck proximate the wing trailing edge. Another foot constraining system is comprised as a frictional device broadly applying the deck, and, may be used in addition to or in lieu of other constraints.

An enhanced kiteboarding system is disclosed, combining at least a footboard and a kiteboard. The footboard has a protruding ridge incorporated therein, and also has one or more BTLE-grain(s) embedded therein. The footboard may also have a safety beacon embedded therein. The user operating the kiteboard system can be equipped with a variety of body-wearable mechanisms, such as wrist-wearable(s), body-wearable(s), and ankle-wearable(s) that communicate with the BTLE grains, as well as other communication products. The BTLE-grains can be located near to the protruding ridge within the footboard, or in a separate location within the footboard. A method of manufacture and method of testing are also disclosed.

A traction pad for fixing to a water board has a contoured upper surface with raised portions protruding therefrom by a protrusion height relative to the contoured surface, some of the raised portions include a higher portion of greater protrusion height than a lower portion; a proportion of the raised portions in one or more regions of the contoured surface have the respective higher portion located in a particular direction on the respective raised portion. A kick for a water board can include a curved or concave lower surface. The kick can have holes in a back face and/or a slot into an upper or lower surface.

Surfboards moved by user power comprises: a surfboard body streamlined, when viewed from a plan view, concave grooves are formed on both sides, respectively; a propulsion body including: a first propulsion body formed with a first propulsion unit that is hinged to one side groove of the surfboard body and is formed inclined with respect to the surfboard body on a lower surface to generate propulsion force according to the movement of the user's feet; and a second propulsion body formed with a second propulsion unit that is hinged to the other side groove of the surfboard body and is formed inclined with respect to the surfboard body on a lower surface to generate propulsion force according to the movement of the user's feet; and a direction change unit including: a rotating shaft passing through the surfboard body; a handle disposed on an upper end of the surfboard body of the rotating shaft to rotate the rotating shaft; and a direction change key that is disposed on a lower part of the surfboard body of the rotating shaft and rotates together with the rotating shaft.

A power surfboard includes a surfboard body defining a first side, a supporting piece including at least one first fastener, and a power assembly. An accommodating groove is defined on the first side of the surfboard body. The supporting piece is arranged in the accommodating groove. The power assembly includes a power housing, an operating assembly, and a power source. The operating assembly includes an operating body, at least one second fastener connected to inner side walls of the operating body, and at least one operating piece arranged on the operating body. The power assembly is detachably arranged in the accommodating groove. When each operating piece is in a first state, each second fastener is connected to a corresponding first fastener. When each operating piece is in a second state, each second fastener is separated from the corresponding first fastener.

A reconfigurable wakesurf binding apparatus and system is provided. In certain embodiments, the wakesurf binding may comprise a top surface of a wakesurf board having a longitudinal axis, a first pair of female threaded inserts in the top surface aligned along a first axis angularly offset from the longitudinal axis of the wakesurf board by a first offset angle, a first strap having a first end comprising a first matrix of holes therethrough, a second end comprising a second matrix of holes therethrough, and a longitudinal axis, wherein the first strap is configured to be removably interconnected with the first pair of female threaded inserts with its longitudinal axis at an angle offset from the first axis, a second pair of female threaded inserts in the top surface aligned along the longitudinal axis of the wakesurf board, and a second strap having a first end comprising a first matrix of holes therethrough, a second end comprising a second matrix of holes therethrough, and a longitudinal axis, wherein the second strap is configured to be removably interconnected with the second pair of female threaded inserts with its longitudinal axis at an angle offset from the longitudinal axis of the wakesurf board.

The swivel lock quick release device is adapted to selectively attach a user to a sports equipment. The sports equipment may be watersports equipment, such as a surfboard, a kite surfing apparatus, a stand-up paddle board, sailing equipment, a wake board, etc., or land sports equipment, such as fishing, camping, climbing, animal collars or leashes, tactical rifle apparatus, and hunting equipment. The swivel lock quick release device having a pull release and a protrusion, the pull release and the protrusion being adapted to be selectively engaged in a locked position is provided. A slide handle, a portion of the pull release, is adapted to be selectively moved in a coaxial direction by the user to disengage the pull release and the protrusion. The pull release is also adapted to rotate around, or swivel, the protrusion.

A foot strap insert and assembly for aquatic sports equipment. The foot strap insert may include: a curved body comprising at least one aperture configured to receive and removably retain at least one fastener therein. The foot strap insert assembly may include: at least one pair of curved bodies comprising two curved bodies, the two curved bodies each comprising at least one aperture. The foot strap insert assembly may also include: aquatic sports equipment and at least one foot strap insert, the at least one foot strap insert comprising a curved body, the curved body comprising at least one aperture. Additionally, the present invention relates to a foot strap insert and assembly that is practical—thereby permitting a user to easily and removably position and insert one or more foot straps—and inexpensive—thus allowing for widespread use in the field of aquatic sports equipment.