HMS Resolution Royal NavyA missile platform was required by the United Kingdom for an effective deterrent during the cold war and in September 1966 HMS Resolution was launched, Britains's first SSBN or missile carrying nuclear powered submarine. Displacement was 8,500 tons with a loa of 425 feet and an underwater speed of 25 kts. The Polaris missiles were made in the USA but with UK built and designed warheads and guidance systems. Adoption of the Polaris missile was