This disclosure extends to systems, apparatus, and methods for sports board hydrofoil masts and mast-to-fuselage connection assemblies for hydrofoil sports boards. In one exemplary system, a hydrofoil mast formed as an elongated member may include a securing structure disposed in a lower region and a fuselage may include a recess into which the mast is inserted. A securing assembly may be disposed in the fuselage for actuation to secure the mast to the fuselage by interacting with the securing structure on the mast. The securing assembly may include a cam member or locking member and an actuating member. Unique hydrofoil masts constructed from composite materials having reinforcing metal members are disclosed and may be useful in the connection assemblies.

A motorized watercraft may include an elongated hull extending along a longitudinal central axis (L) and a propulsion system. The propulsion system may include a drive module. The drive module may be mounted to the elongated hull. The drive module may include a motor and a propelling member. The motor may be in driving connection with the propelling member. A bottom surface of the elongated hull may be provided with a first channel and a second channel that respectively extend along the elongated hull on each side of the longitudinal central axis (L).

A motorized watercraft may include an elongated hull extending along a longitudinal central axis (L) and a propulsion system. The propulsion system may include a drive module. The drive module may be mounted to the elongated hull. The drive module may include a motor and a propelling member. The motor may be in driving connection with the propelling member. A bottom surface of the elongated hull may be provided with a first channel and a second channel that respectively extend along the elongated hull on each side of the longitudinal central axis (L).

This disclosure extends to systems, apparatus, and methods for quick release mast mounting assemblies for board mounted hydrofoil assemblies. In one exemplary system, a quick release mounting assembly may include board mountable base receiver for mounting to a sports board, which defines a longitudinal receiving recess. A resilient locking member is disposed at a front end of the base receiver. A separate mast connection member formed as a body configured for connection to an upper end of a hydrofoil mast, corresponds to the longitudinal receiving recess, and includes a counterpart structure for forming a secure connection with the resilient locking member. The mast connection member may include opposite shoulder or wing members that extend laterally orthogonal to the longitudinal axis thereof and the receiving recess may include counterpart slots for receiving these members. The resilient locking member may include a separate spring assembly or be a unitary member.

This disclosure extends to systems, apparatus, and methods for quick release mast mounting assemblies for board mounted hydrofoil assemblies. In one exemplary system, a quick release mounting assembly may include board mountable base receiver for mounting to a sports board, which defines a longitudinal receiving recess. A resilient locking member is disposed at a front end of the base receiver. A separate mast connection member formed as a body configured for connection to an upper end of a hydrofoil mast, corresponds to the longitudinal receiving recess, and includes a counterpart structure for forming a secure connection with the resilient locking member. The mast connection member may include opposite shoulder or wing members that extend laterally orthogonal to the longitudinal axis thereof and the receiving recess may include counterpart slots for receiving these members. The resilient locking member may include a separate spring assembly or be a unitary member.

A method of forming a surf craft includes: providing a bottom section including a surface thereon, wherein at least a portion of the bottom surface section defines a bottom portion of a channel formed on a bottom surface of the surf craft; joining a first side section with the bottom section, the first side section having a shaped wall portion defining a first side wall of the channel formed on the bottom surface of the surf craft; joining a second side section with the bottom section, the second side section having a shaped wall portion defining a second side wall of the channel formed on the bottom surface of the surf craft, the second side wall being opposed to the first side wall; and shaping one or more outer edges of the bottom section, first side section, and second side section into a desired shape of the surf craft.

A method of forming a surf craft includes: providing a bottom section including a surface thereon, wherein at least a portion of the bottom surface section defines a bottom portion of a channel formed on a bottom surface of the surf craft; joining a first side section with the bottom section, the first side section having a shaped wall portion defining a first side wall of the channel formed on the bottom surface of the surf craft; joining a second side section with the bottom section, the second side section having a shaped wall portion defining a second side wall of the channel formed on the bottom surface of the surf craft, the second side wall being opposed to the first side wall; and shaping one or more outer edges of the bottom section, first side section, and second side section into a desired shape of the surf craft.

A self-propelled hydrofoil surfboard includes a surfboard having a mast mounted to the lower surface of the surfboard, a selectively controllable thruster mounted at a lower end of the mast, a controller and a battery to supply power to the controller and thruster, the controller cooperating with a remote controller adapted to give control inputs to the controller and to be carried when in use by a rider, navigation lights mounted around at least a portion of the circumferential edge of the surfboard, and wherein the mast may have an adjustable length.

A self-propelled hydrofoil surfboard includes a surfboard having a mast mounted to the lower surface of the surfboard, a selectively controllable thruster mounted at a lower end of the mast, a controller and a battery to supply power to the controller and thruster, the controller cooperating with a remote controller adapted to give control inputs to the controller and to be carried when in use by a rider, navigation lights mounted around at least a portion of the circumferential edge of the surfboard, and wherein the mast may have an adjustable length.

Embodiments of water activity board 10 that may be configured with several components 210A-H to form a WABS 200, where the components 210A-H may be securely and removably coupled to the board 10 via one or more rail modules 100A-I. Other embodiments may be described and claimed.