The description says "All electronic components are sealed to enable the truck to ford a stream up to 5 feet deep, in case you want to drive under water.. .".
Would the tires need to be filled with liquid instead of air to keep the Humvee from floating? Do Humvees require a special water forging system to keep the engine's air intake system from taking in water?
My Ford F-150 4 wheel drive almost floats on the water.