A watercraft including: a motor drive; a stern module; a bow module releasably connected to the stern module by a first connector; a controller; and a remote control configured to be operated by an operator. The remote control being configured to transfer movement control signals to the controller for operating the motor drive. Where the stern module having a first receiver, and the bow module having a transmitter. The transmitter is connected to the remote control and is configured to transmit the movement control signals received from the remote control. The first receiver is configured to receive the movement control signals from the first transmitter and forward the movement control signals to the controller.

Recreational board such as paddleboards and surfboards, and methods of assembling and disassembling the recreational boards, the boards including a front portion, a back portion, and a plurality of elongated supports extending between the front portion and the back portion and located within, and removable from, recesses in the front portion and/or the back portion. The recreational board may further include a releasable fastening element securing connecting the front portion to the back portion.

Recreational board such as paddleboards and surfboards, and methods of assembling and disassembling the recreational boards, the boards including a front portion, a back portion, and a plurality of elongated supports extending between the front portion and the back portion and located within, and removable from, recesses in the front portion and/or the back portion. The recreational board may further include a releasable fastening element securing connecting the front portion to the back portion.

The invention relates to an inflatable surfboard having a hull component (2) with a receptacle (4) at the stern end, a drive unit (3) which fits into the receptacle (4) at the stern end in a positively locking manner, and a gap (6) on the underwater surface between the hull component (2) and the drive unit (3), wherein an overlap (8) which covers the gap (6) at least in some sections is arranged on an underwater surface (7) of the hull component (2).

The invention relates to an inflatable surfboard having a hull component (2) with a receptacle (4) at the stern end, a drive unit (3) which fits into the receptacle (4) at the stern end in a positively locking manner, and a gap (6) on the underwater surface between the hull component (2) and the drive unit (3), wherein an overlap (8) which covers the gap (6) at least in some sections is arranged on an underwater surface (7) of the hull component (2).

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.

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 hydrofoil watercraft, in particular, a hydrofoil board is described herein. The hydrofoil board may comprise one or more of a body, a hydrofoil assembly, and/or other components. The body may have one or more of a deck surface configured to support a rider, a bottom surface opposite the deck surface, and/or other surfaces and/or features. The body may comprise a fore portion having a planing surface forming part of the bottom surface. The body may have an aft portion having an aft bottom surface forming part of the bottom surface. The fore portion may be toward a front end of the board. The aft portion may be toward a rear end of the board. An aft cross-sectional thickness between the deck surface and the aft bottom surface may be less than a fore cross-sectional thickness between the deck surface and the planing surface.

A modular hydrofoil watercraft may include a plurality of modules which are releasably connectable to each other to when assembled form the modular hydrofoil watercraft. The modular hydrofoil watercraft when assembled may include a hull extending along a longitudinal center axis, a propulsion system that has a motor and a propelling member, a mast that extends downwardly from the hull and a hydrofoil connected to the mast.

A modular hydrofoil watercraft may include a plurality of modules which are releasably connectable to each other to when assembled form the modular hydrofoil watercraft. The modular hydrofoil watercraft when assembled may include a hull extending along a longitudinal center axis, a propulsion system that has a motor and a propelling member, a mast that extends downwardly from the hull and a hydrofoil connected to the mast.