The name amphibious vehicle evokes a vehicle exhibiting “all-terrain” capabilities. Apart from land and water now-a-days these are even intentionalised to work on intermediates like ice, snow, mud, marsh, swamp etc. even on air-cushion. The first known self propelled amphibious vehicle was Orukter Amphibolos built by United States artificer Oliver Evans in 1805. Using a waterproof hull and a propeller, lightly armoured vehicles can be made amphibious. But for heavily armoured ones inflatable floatation devices are used as they need buoyancy to a greater extent than the lighter ones. For some vehicles spinning of wheels or tracks makes them propulsive while others use screw propellers or water jets.