The Poseidon torpedo is a Russian nuclear-powered weapon that carries a nuclear warhead.
Although it is not yet ready, it will soon be one of the deadliest weapons in the world.
The goal is to be able to hit coastal cities with devastating results. It will also be able to be used against large warships such as aircraft carriers.
Its speed is 70 knots which means it cannot be hit by another torpedo. It still moves at a depth of 1,000 meters which makes it undetectable.
Plus, being nuclear powered means it has unlimited range.
[Source: http://www.navalnews.com]
