Abstract: A collapsible kayak may include a single-piece hull including a plurality of crease lines along which the hull is foldable. A removable floorboard lines a midship portion of the hull between a bow portion and a stern portion, the floorboard including a seat assembly and configured to be releasably retained by a pair of outboard walls permanently fixed at port and starboard sides of the cockpit. The stern portion of the hull is permanently folded in a V-shaped (AKA swallowtail) configuration to form a closed transom of the kayak. The bow, stern, and midship portions are configured as a tri-fold, such that the bow portion and the stern portion of the kayak are foldable toward each other to overlap the midship portion of the hull when collapsed.

Abstract: A collapsible watercraft comprises a foldable sheet and is transitionable between a deployable kayak configuration and a stowed configuration by folding or unfolding along predefined fold lines in the foldable sheet. In the kayak configuration, the watercraft is switchable between at least a single-seat configuration and a tandem configuration by installing a desired number of seat and footrest assemblies. At least some of the seat and footrest assemblies are installed in the kayak by strapping seat and/or footrest components to loops nonreleasably attached to removable floorboards of the kayak. The removable floorboards are installed in the kayak using extruded engagement profiles.

Abstract: A collapsible watercraft comprises a foldable sheet and is transitionable between a deployable kayak configuration and a stowed configuration by folding or unfolding along predefined fold lines in the foldable sheet. In the kayak configuration, the watercraft is switchable between at least a single-seat configuration and a tandem configuration by installing a desired number of seat and footrest assemblies. At least some of the seat and footrest assemblies are installed in the kayak by strapping seat and/or footrest components to loops nonreleasably attached to removable floorboards of the kayak. The removable floorboards are installed in the kayak using extruded engagement profiles.

Abstract: A collapsible watercraft is comprised of a single high-strength foldable panel to fold into the form of a kayak with integrally defined keel, hull, sides, and deck. Using a single sheet of high strength panel creased in a predetermined pattern to form living hinges, the panel may be folded and transformed from self-defined compact knocked down package, into a rigid three dimensional tubular manifold in a kayak form that is optimized for performance in the water. Other removable rigid structural members, primarily a cockpit rim, rib, and floorboards help maintain the shape and integrity of the shell.

Abstract: A collapsible watercraft is comprised of a single high-strength foldable panel to fold into the form of a kayak with integrally defined keel, hull, sides, and deck. Using a single sheet of high strength panel creased in a predetermined pattern to form living hinges, the panel may be folded and transformed from self-defined compact knocked down package, into a rigid three dimensional tubular manifold in a kayak form that is optimized for performance in the water. Other removable rigid structural members, primarily a cockpit rim, rib, and floorboards help maintain the shape and integrity of the shell.

Abstract: A method and apparatus to control a lighting source such as a streetlight and modulate the output of the lighting source so that artificial illumination is reduced when moonlight is available to illuminate the area. The apparatus includes a sensor assembly for detecting moonlight in the night sky, an electronic circuit for processing the sensor signals in combination with moonrise and moonset data, and modulating the power applied to the lighting source in response to the intensity of the incident moonlight.