Abstract: A vehicle is adapted to operate on land and in water having a depth of over four feet. The vehicle includes a chassis, one or more pontoons supported by the chassis, and a track system disposed on each of the one or more pontoons and adapted to provide propulsion to the vehicle. Each pontoon has a height of at least four feet, a width and a length adjacent to the land, wherein a ratio of the height to the width exceeds 1.4, and a volume configured to provide buoyancy and support the chassis weight.

Abstract: A vehicle is adapted to operate on land and in water having a depth of over four feet. The vehicle includes a chassis, one or more pontoons supported by the chassis, and a track system disposed on each of the one or more pontoons and adapted to provide propulsion to the vehicle. Each pontoon has a height of at least four feet, a width and a length adjacent to the land, wherein a ratio of the height to the width exceeds 1.4, and a volume configured to provide buoyancy and support the chassis weight.

Abstract: The chassis connects adjacent flotation members each having supports projecting therefrom for attaching to the chassis. The chassis includes a pair of beams having opposite ends and sides with an end flange affixed to the ends of the beams. A plate is affixed to one of the opposite sides of the beams and has a length greater than the beams to form extension surfaces at each end. The extension surfaces are connected to the supports on a first plane and the end flanges are connected to the supports on another plane, preferably perpendicular to the first plane and vertical to the ground. The beams are preferably I-beams having a web and opposing extending sides perpendicular to the web. The top side is longer than the web and other side so as to form a tine which is received in a recess in the end flanges.