The appearance of the Royal Navy ballistic missile submarine H.M.S. Vengeance is enough to believe the ship’s motto, Safe By My Strength. Especially knowing the ship carries 16 Trident missiles armed with nuclear warheads. According to the Royal Navy the Vengeance is one of four “. . . of the current Vanguard-class submarines on patrol somewhere in the oceans of the globe, protecting the UK through a credible nuclear deterrent.” These submarines also carry the secret “Letters of Last Resort”, which are instructions to be carried out if the Prime Minister along with the rest of the British government is destroyed.