Virginia Class
This American nuclear attack submarine is enough to scare the North Korean military back into hiding. The U.S. Navy plans to build 48 of these bad boys, while at the moment they have 16 of them.
Oscar II Class
And now back to the Russians. The Soviet Union built this powerful submarine in 1981 and still have it in service now. It is equipped with cruise missiles with warheads and anti-submarine torpedoes. I think we can all agree that we wouldn’t want to meet up with this guy while taking a dip in the ocean.