What You Need to Know: In February 2009, the British HMS Vanguard and French Le Triomphant, both nuclear-powered ballistic missile submarines, collided in the Atlantic Ocean during routine patrols.

A Vanguard-class boat reportedly returned to its Faslane base on Monday after 204 days under the waves, according to Navy Lookout. The vessel, thought to be HMS Vanguard, ...

HMS Vanguard, launched in 1946 after battleships were already outdated, ... she had been designed for coastal defense and her decks were not safe from high waves on the open ocean!

The Royal Navy's fourth and final Vanguard-class submarine - HMS Vengeance - had spent an epic 201 days gliding beneath the waves, acting as Britain's nuclear deterrent ...

HMS Vanguard was under the surface, hovering at launch depth, but was not hit by the 44ft missile as it plunged back into the Atlantic.. Immediately, a frantic probe began to find out what went ...

HMS Vanguard returned home on Monday after more than 200 days at sea (Image: Getty) A former Royal Navy submarine captain is warning increasingly long patrols beneath the waves could lead to a ...

HMS Vanguard is 150 meters (492 feet) long and has a displacement of 15,900 tons, and can hit top speeds in excess of 25 knots (46 kph / 29 mph) when submerged. Glued-on bolts are not taken into ...

A British nuclear missile test launch failed at a test site off the coast of Florida, marking the second time in eight years that the country’s Trident 2 ballistic missiles have malfunctioned ...

Britain’s HMS Vanguard was the lead boat in the Vanguard-class ballistic missile submarine. It displaced 16,000 tons when submerged. It registered a length of around 149.9 meters, or 492 feet.