The Borey Class submarine, dubbed Vladimir Monomakh, has a next generation nuclear reactor, can dive deeper than 1,200 feet, and carries up to 20 nuclear intercontinental ballistic missiles (ICBM).

Each of these "Bulava" ICBM's can carry ten detachable MIRV warheads, what they call "re-entry vehicles," capable of delivering 150 kiloton yields per warhead (luckily, tests of the warheads only yielded 11 "successes" out of almost 20 attempts). Which doesn't mean they aren't a concern, MIRV's are what shook the Cold War to its foundation when they first appeared in the 1970s.