Disclosed is a tool for watercraft fin insertion and removal. The tool includes: a first external elongated layer, a second external elongated layer, aligned with, and positioned at a substantially parallel plane to the plane of, the first external layer. An internal layer is positioned between, and stretches across a portion of the area of, the external layers. Upon positioning the tool such that the inner surfaces of the external layers are adjacent to the outer surfaces of the watercraft fin, a curved fin engagement elements on the edge of the internal layer, complements at least a portion of the leading edge or the trailing edge of the watercraft fin.

A motorized fin booster system for surfboard or paddleboard or recreational small craft, consisting of at least one detachable motorized fin and at least one external, contour conforming and waterproof power supply are disclosed. The disclosed system allows for the addition and removal of electrically powered boost to nearly any board without permanent alteration of the board. The system integrates with widely used surfboard components; such as surf fins, leashes, ankle cuffs, and traction pads.

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.

A fin arrangement for a surf craft includes a base coupling portion to couple the fin arrangement to the surf craft; a central fin having a central fin base portion, the central fin coupled to the base coupling portion to extend substantially perpendicularly away from an underside of the surf craft; a first side fin coupled to the central fin base portion and extending away from the central fin and the surf craft at a first acute angle to the central fin; and a second side fin coupled to the central fin base portion and extending away from the central fin and the surf craft at a second acute angle to the central fin, the second acute angle being substantially the same as the first acute angle, and a projecting lobe extending rearwardly from the base of the central fin.

An electronically powered, light emitting fin used with a surfboard or paddleboard, or similar water sports board. The fin is configured to be attached to the water sports board to provide illumination under the board when using the device. The lighted fin may be particularly useful when using the water sports board at night to illuminate water beneath the board.

A method and system for providing a watercraft device are disclosed. The watercraft device comprises a board, a throttle coupled to a top surface of the board, a hydrofoil coupled to a bottom surface of the board, and an electric propeller system coupled to the hydrofoil. The electric propeller system powers the watercraft device using information generated from the throttle. A center of buoyancy in a non-foiling mode of the watercraft device and a center of lift in a foiling mode of the watercraft device are aligned.

This new art offers six add on motorized attachments for the benefit of the recent trend of hydro foil surfing wherein said wave hydro foils comprise a mast attached to the bottom side of a surfboard and a fuselage that has a large forward lifting wing and a small aft stabilizing wing and is able to lift a 250 lb man and surfboard approximately two feet above the water surface at slow paddling speeds riding a wave from underneath the water surface wherein said new art enables said hydrofoil surfboard to motor along on flat water at high speeds cruising or fielding for waves then said new art can retract a motorized structure completely out of the water while in motion to allow a surfer to catch then foil ride a wave or an ocean swell without power by means of two types of retractable motorized apparatus wherein the first type has a vertical strut that holds a propeller and cort nozzle in a down position motoring forward wherein said strut can retract horizontally up and out from the water surface wherein this retractable strut type can embody three similar versions. Also the second type has a torpedo shaped fuselage that contains a motor, a propeller and cort nozzle also embodying three similar versions that can travel up the foil mast stopping at said surfboard's bottom surface with the power shut off allowing the remaining under water foil apparatus to glide and free ride a wave or swell as it was designed to.

A water propulsion electric powered water recreation surf board with an integrated water propulsion jet to provide additional thrust for maneuvers and different selectable thrust levels as needed during the maneuver. The water propulsion electric powered water recreation surf board includes a body having an upper surface and bottom surface and a water propulsion system integrated into the body including a water inlet on the bottom surface, and a water propulsion nozzle and propeller on the upper surface. An electric motor connects to rotate propeller for drawing water into the propulsion system and expels a pressurized column of water through the water propulsion nozzle. A removable rechargeable battery is connected with the electric motor and a controller with a user control pad on the top surface of the body to allow the user to control the operation of the water propulsion system.

A board paddling training apparatus for assisting in improving a user's paddling technique and strength. In particular, the board paddling training apparatus includes a buoyant board, such as a board adapted for surfing, bodyboarding, paddleboarding, or other board-related sport that entails paddling, and includes a resistance mechanism that creates drag or resistance against a user's paddle stroke. Some implementations of the resistance mechanism can be adjustable in order to create a variety of resistance against the user's paddle stroke and board movement.

A jewelry display includes a ferromagnetic planar substrate having a front surface opposite a back surface. A bracket is configured to be attached to a wall, the bracket comprising at least one bracket magnet which is a permanent magnet. The back surface of the ferromagnetic planar substrate is configured to removably attach to the bracket due to the magnetic force of the at least one bracket magnet. A plurality of jewelry fixtures are configured to be removably attached to the front surface of the ferromagnetic planar substrate. Each jewelry fixture includes at least one permanent fixture magnet and a jewelry holding structure. The at least one permanent fixture magnet of each jewelry fixture is magnetically attracted to the ferromagnetic planar substrate. The at least one bracket magnet may be at least 2, 5, 10 times or more as powerful as the at least one permanent fixture magnet.