A droneboarding system is disclosed. The droneboarding system includes an unmanned aerial vehicle (drone) for pulling a droneboarder riding a board over a surface, a harness, a tow handle and a plurality of tension lines. Each tension line is attached to the drone and to either the tow handle or the harness. The tension lines are configured in a manner that provides mechanical control of the flight path of the drone. A remote power supply is adapted to be carried by the droneboarder. One of the tension line carries an electrical conductor from the remote power supply to the drone. The electrical conductor provides electrical power from the remote power supply to the drone.

A droneboarding system is disclosed. The droneboarding system includes an unmanned aerial vehicle (drone) for pulling a droneboarder riding a board over a surface, a harness, a tow handle and a plurality of tension lines. Each tension line is attached to the drone and to either the tow handle or the harness. The tension lines are configured in a manner that provides mechanical control of the flight path of the drone. A remote power supply is adapted to be carried by the droneboarder. One of the tension line carries an electrical conductor from the remote power supply to the drone. The electrical conductor provides electrical power from the remote power supply to the drone.

A system may include an inflatable towable vehicle. The inflatable towable vehicle may include a spinner apparatus attached to a bottom side of the inflatable towable vehicle. At least a portion of the spinner apparatus may be configured to be submerged when the inflatable towable vehicle is towed in water. The spinner apparatus may include: a base configured to abut the bottom side of the inflatable towable vehicle when the spinner apparatus is attached to the bottom side of the inflatable towable vehicle; a post extending away from the base; a cylindrical tube, wherein the post may extend through the cylindrical tube, wherein the cylindrical tube may be configured to rotate around the post; and a tow rope attachment member attached to and extending from the cylindrical tube. The inflatable towable vehicle may be configured to rotate as the inflatable towable vehicle is towed.

An adjustable sports rope comprised of a hollow base rope sheath and an adjustment rope. The hollow base rope sheath is a hollow sheath with at least two openings. The adjustment rope enters into the hollow base rope sheath through one of the at least two openings and exits the base rope sheath through another of the at least two openings. The one end of the hollow base rope sheath terminates at a tie point. The end of the adjustment rope disposed furthest from the hollow base rope sheath tie point is also a tie point. By creating a tensile force between the tie point of the hollow base rope sheath and the tie point of the adjustment rope, the hollow base rope sheath will tighten on the adjustment rope, holding the adjustment rope in place.

An adjustable sports rope comprised of a hollow base rope sheath and an adjustment rope. The hollow base rope sheath is a hollow sheath with at least two openings. The adjustment rope enters into the hollow base rope sheath through one of the at least two openings and exits the base rope sheath through another of the at least two openings. The one end of the hollow base rope sheath terminates at a tie point. The end of the adjustment rope disposed furthest from the hollow base rope sheath tie point is also a tie point. By creating a tensile force between the tie point of the hollow base rope sheath and the tie point of the adjustment rope, the hollow base rope sheath will tighten on the adjustment rope, holding the adjustment rope in place.

A multipurpose watercraft has a pair of catamaran pontoons supported by way of a transverse control bar at forward regions thereof. The watercraft may have an arched equipment rack framework extending above rearward regions of the pontoons. The watercraft also has a pair of electric motor thrusters located respectively beneath each pontoon and the control bar comprises a pair of controls operable by hand, each control operable to control a respective thruster forwards or backwards. Alternatively, the thrusters may be remotely controlled. This configuration allows an operator to be pulled behind the control bar horizontally between the pontoons, snorkellers to be pulled behind the watercraft for recreational sightseeing and/or for remote-control rescue operations.

Cuff assemblies for sports board leashes, where the cuff assembly includes a central section that having a precurved molded insert that is configured to connect to a cord of the sports board leash, a first wing attached to a first side of the central section, and a second wing attached to a second side of the central section. The maximum width of the central section of the cuff assembly is greater than the maximum width of either of the first wing or second wing, and the first wing and second wing are configured to overlap and fasten to each other in order to secure the cuff assembly around a person's limb portion.

Cuff assemblies for sports board leashes, where the cuff assembly includes a central section that having a precurved molded insert that is configured to connect to a cord of the sports board leash, a first wing attached to a first side of the central section, and a second wing attached to a second side of the central section. The maximum width of the central section of the cuff assembly is greater than the maximum width of either of the first wing or second wing, and the first wing and second wing are configured to overlap and fasten to each other in order to secure the cuff assembly around a person's limb portion.

A safety tether for providing a user with a connection to a vehicle includes a substantially rigid, elongate handle graspable by the user and a flexible line extending from one end of the handle and being attachable to a vehicle. An opposing end of the handle is free to move relative to the flexible line. The flexible line is elastically extendible from a relaxed configuration having a relaxed length to a taut configuration having a taut length, the taut length being greater than the relaxed length.

A safety tether for providing a user with a connection to a vehicle includes a substantially rigid, elongate handle graspable by the user and a flexible line extending from one end of the handle and being attachable to a vehicle. An opposing end of the handle is free to move relative to the flexible line. The flexible line is elastically extendible from a relaxed configuration having a relaxed length to a taut configuration having a taut length, the taut length being greater than the relaxed length.