English: Royal Navy Vanguard Class submarine HMS Vigilant returning to HMNB Clyde after her extended deployment.
The four Vanguard-class submarines form the UK's strategic nuclear deterrent force. Each of the the four boats is armed with Trident 2 D5 nuclear missiles. Like all submarines the Vanguard Class are steam powered, their reactors converting water into steam to drive the engines and generate electricity.
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== {{int:filedesc}} == {{information |description={{en|Royal Navy Vanguard Class submarine HMS Vigilant returning to HMNB Clyde after her extended deployment.
The four Vanguard-class submarines form the UK's strategic nuclear deterrent force. Each o...
Royal Navy Vanguard Class submarine HMS Vigilant returning to HMNB Clyde after her extended deployment.The four Vanguard-class submarines form the UK's strategic nuclear deterrent force. Each of the the four boats is armed with Trident 2 D5 nuclear missiles. Like all submarines the Vanguard Class are steam powered, their reactors converting water into steam to drive the engines and generate electricity.