Looks awesome. I assume that given these are Meso-Nai vehicles that their bulk and shape allow them to be fully amphibious. Presumably they are made from an experimental Meso-Nai alloy that is as tough as steel but allows the vehiicle to float on or just under the water - hence the shape, size and streamlining. No need for a schnorkel if the power pack is fusion and the soldiers have gills as well as lungs!