The US Marines are testing a really big amphibious vehicle called the Ultra Heavy Lift Amphibious Connector (UHAC for short).
Back in 2014, it took part in a Marine Corps Advanced Warfighting Experiment which was “the culmination of a decade of progressive experimentation.”
The UHAC is especially impressive due to its size and adaptability, using buoyant paddles to move itself over all sorts of terrain; it can also paddle itself across water and thanks to the foam materials the paddles are made out of it’s gentle to the surface it touches.
Its only real problem is the fact that it can only travel at four knots maximum speed, which equates to just 4.6 mph or 7.4 km/h. However, the Marines have undoubtedly found a tactical use for it in its current form, otherwise it would not have been built, so we won’t insist on that.
The vehicle you see in the video below, the one which took part in the drill, is actually a half-sized prototype of the planned final vehicle. It stands 18 feet high or around 5.5 meters. Weight is around 38 tons.
Apparently, the full-sized version will be much faster, even if it’s going to be much heavier; its top speed is expected to be closer to 25 mph or 40 km/h.