Guardian of our nuclear deterrent. Armed with Trident 2 D5 missiles and cutting-edge steam technology they ensure our ultimate defense.
Vanguard Class submarine
A powerful quartet
The Royal Navy’s Vanguard Class consists of four nuclear-powered ballistic missile submarines – HMS Vanguard, Vengeance, Victorious and Vigilant. Like the Astute Class of submarines, nuclear power is provided by a Rolls-Royce PWR 2 reactor that converts water into steam to drive the engines and generate electricity.
The giant of the deep
The Vanguard Class submarines are the largest manufactured in the UK, displacing 15,900 tonnes when submerged - twice the displacement of the Resolution Class Polaris submarines that they replaced. They are the third largest vessels currently in service with the Royal Navy.
About the crew
Unmatched firepower & technology
The ultimate deterrent
Each Vanguard Class submarine is armed with 48 Trident 2 D5 nuclear warheads
The Trident nuclear missile is Britain’s ultimate deterrent and weapon. These missiles can be fired at targets up to 4,000 miles away, ejected from the sub’s ballistic missile tubes by high-pressure gas before firing when they reach the surface of the water.
Although Vanguard submarines have the capacity to accommodate 192 nuclear warheads, they are currently only permitted to hold a maximum of 48.
Vanguard Class subs can scope out their surrounds using the latest technology
Vanguard Class submarines are fitted with two periscopes - the CK51 search periscope and the CH91 attack periscope - which are combined into an optronic mast on the submarine’s fin.
Optronic masts are electronic imaging systems (comprising of a TV camera and thermal imager) that do not penetrate a submarine’s hull. Images from these masts are sent via fibre-optics to two workstations and a commander’s control console.