Virginia-class Submarine (United States)
United States navy has one of the best nuclear submarines at present in the world; called Virginia class (SSN-774 class). It is nuclear powered fast attack submarine. It came into the existence in 2004 and they are expected to be in service till 2060. The Top speed is 25 knots. It has 12 vertical launch system for 109 Tomahawk missiles and four bow tubes for Mk48 torpedoes. Smart mines can also be deployed instead of the torpedoes.
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