Abstract: A system of brackets and rails for attaching wheels, towing devices, and other accessories to small pontoon watercraft in various locations and combinations to increase the transportability and utility of the watercraft. Among the advantages are the ability to tow the watercraft by hand or bicycle, and to allow other devices such as a human powered pedal drive, trolling motor, bike rack, cargo rack, and other accessories to be attached easily and without the use of tools.

Abstract: A system of brackets and rails for attaching wheels, towing, and accessory devices to a pontoon water bike to increase the transportability and utility of the craft by making it towable by pedestrian and bicycle, converting it to amphibious operation, and allowing a variety of other attachments to create a more capable and efficient watercraft.

Abstract: An improved human powered watercraft propulsion device and mounting frame for attachment to existing pontoon watercraft. The propulsion device is light weight, self-contained, portable, has few moving parts made from corrosive resistant materials, and is propeller driven for quiet, efficient, and environmentally friendly underwater propulsion. Having a simple twisted belt configuration with an open structural design, all of the components are easily viewed and maintained by the user, as well as continuously cleaned, cooled, and lubricated by the water during operation, without the need for a sealed waterproof housing and internal oil bath. Hand knobs provide belt tensioning during operation and the device is adapted for operation by pedal, friction wheel, or direct chain drive. The device is adjustable on the attachment frame to fit the operator, pivots when beaching or striking an underwater object, and components such as pulleys and the propeller are changeable to achieve different power ratios.

Abstract: An amphibious float system removably and nondestructively attached to a bicycle, having floats that raise and lower simultaneously on pivoting arms that swing longitudinally in a fore and aft arc and lock in place in a desired position by hand manipulable connections for transition between land and water travel without modification of the bicycle. The bicycle remains fully assembled and the lift arms provide ample clearance above land and water to keep the bicycle and rider fully out of the water for dry feet operation. The system carries everything with it to convert between multiple modes of operation, including as an amphibious bicycle, an amphibious water cycle, a conventional bicycle, and a pontoon boat. A self-engaging drive system and removably attached rudder aid in changeovers for repeated land and water evolutions, and both kick-up when encountering land or underwater obstructions.