The Russian Defense Ministry has released the first video ever showing an underwater 'field-test' of the Poseidon, a huge.
World's Largest Military Hovercraft
This is the world's largest military hovercraft and it belongs to the Russian army. It is armed with missiles, artillery and AA defense guns and can carry a few heavy tanks at once. After approaching to the enemy coastline it can give a burst of fire to tear of such fierce force that can tear big military ship apart, then without any slowing down start moving on the shore advancing deep inside to unload the tanks and infantry.