A board suitable for riding a wave is described. The board includes interconnected deck and bottom reinforcing zones.

A smart clothing and backpack system enables a user to perform many actions. The smart clothing includes circuitry and/or is made of a conductive material enclosed in an insulation material. The smart clothing includes a set of sensors configured to detect body information. The smart clothing includes multiple electromagnets configured to adjust a size of the smart clothing. The electromagnets are configured to have an increased attraction to make the smart clothing tighter on the body of the user. The system includes a smart backpack to communicate with the smart clothing. The smart backpack includes a Radio Frequency IDentification (RFID) reader configured to detect RFID tags on or in items within the smart backpack. Many other features are able to be implemented with the smart clothing and backpack system. The smart clothing is able to include a wetsuit configured to communicate with a surfboard and/or a backpack.

A smart clothing and backpack system enables a user to perform many actions. The smart clothing includes circuitry and/or is made of a conductive material enclosed in an insulation material. The smart clothing includes a set of sensors configured to detect body information. The smart clothing includes multiple electromagnets configured to adjust a size of the smart clothing. The electromagnets are configured to have an increased attraction to make the smart clothing tighter on the body of the user. The system includes a smart backpack to communicate with the smart clothing. The smart backpack includes a Radio Frequency IDentification (RFID) reader configured to detect RFID tags on or in items within the smart backpack. Many other features are able to be implemented with the smart clothing and backpack system. The smart clothing is able to include a wetsuit configured to communicate with a surfboard and/or a backpack.

Embodiments of a wave riding board include a body having a top, a bottom, a right edge, a left edge, a front, a rear and a length defined from the front to the rear. The bottom of the body includes a plurality of steps and a channel defined between at least a portion of the plurality of steps. The channel extends along at least a portion of the length of the body.

In one example, a watercraft includes a hull that defines a recessed portion, and the hull is a unified, single-piece, structure. The watercraft further includes a self-draining scupper with a passageway that is integral with the hull and communicates with the recessed portion, the passageway extending from the recessed portion through an exterior surface of the hull. The self-draining scupper further includes a stopper disposed in the passageway, and a flow plate that helps to confine the stopper in the passageway.

A surfboard having laterally opposed pairs of axial or lengthwise grooves with the pair forming opposed rails of greater stiffness and reduced mass. At least one of the grooves of each pair is at a board edge extremity and the other groove is nearby, preferably near or on the lower side of the surfboard. The grooves may be laid up with epoxy or fiberglass.

Embodiments of a wave riding board include a body having a top, a bottom, a right edge, a left edge, a front, a rear and a length defined from the front to the rear. The bottom of the body includes a plurality of steps and a channel defined between at least a portion of the plurality of steps. The channel extends along at least a portion of the length of the body.

An alignment structure for a battery pack and a propulsion module for a powered watercraft. The alignment structure is configured to be received in and affixed to a powered watercraft. The alignment structure includes a first alignment feature configured to receive a removable battery pack and a second alignment feature configured to receive a removable propulsion module for propelling the powered watercraft in a longitudinal direction. The alignment structure extends along the longitudinal direction to provide a space for receiving the battery pack and/or the propulsion module. The first alignment feature and the second alignment feature are together configured for positioning and fixedly locating a battery pack and a propulsion module relative to each other so that the battery pack and the propulsion module having been received in the alignment structure are individually removable.

An alignment structure for a battery pack and a propulsion module for a powered watercraft. The alignment structure is configured to be received in and affixed to a powered watercraft. The alignment structure includes a first alignment feature configured to receive a removable battery pack and a second alignment feature configured to receive a removable propulsion module for propelling the powered watercraft in a longitudinal direction. The alignment structure extends along the longitudinal direction to provide a space for receiving the battery pack and/or the propulsion module. The first alignment feature and the second alignment feature are together configured for positioning and fixedly locating a battery pack and a propulsion module relative to each other so that the battery pack and the propulsion module having been received in the alignment structure are individually removable.

A smart clothing and backpack system enables a user to perform many actions. The smart clothing includes circuitry and/or is made of a conductive material enclosed in an insulation material.

The smart clothing includes a set of sensors configured to detect body information. The smart clothing includes multiple electromagnets configured to adjust a size of the smart clothing. The electromagnets are configured to have an increased attraction to make the smart clothing tighter on the body of the user. The system includes a smart backpack to communicate with the smart clothing. The smart backpack includes a Radio Frequency IDentification (RFID) reader configured to detect RFID tags on or in items within the smart backpack. Many other features are able to be implemented with the smart clothing and backpack system. The smart clothing is able to include a wetsuit configured to communicate with a surfboard and/or a backpack.