The Dreadnought class is the future replacement for the Vanguard class of ballistic missile submarines. Like their predecessors they will carry Trident II D-5 missiles. Four nuclear-powered ballistic missile submarine are planned, two building. First expected 2030. Displacement 17.000 tons, length 163 m. Boarding 8 to12 SBLM’s = submarine-launched ballistic missiles with an operational range of 12.000 km. Mass: 60 tons. Each missile is capable to carry up to 14 warheads called multiple independently targetable reentry vehicles. But In practice, each missile on average carries four warheads due to the warhead limitations placed by the New START treaty.

Only few nations operate Ship Submersible Ballistic Nuclear SSBN