HMS Vanguard and Le Triomphant submarine collision across the seabed". However, a government spokesman said that there "was no compromise to nuclear safety". Hervé Morin, France's Minister of Defence, said that they "face an extremely simple technological problem, which is that these submarines are not detectable". HMS Vanguard and Le Triomphant submarine collision The submarines HMS "Vanguard" and "Triomphant" collided in the Atlantic Ocean in the night between 3–4 February 2009. Both are nuclear-powered ballistic missile submarines. The Royal Navy's and the French Navy's both sustained damage, but no injuries or radioactivity releases were reported. At the time of the collision, both vessels were submerged and, according
French submarine Y motor and batteries for submerged running, but eventually the idea was abandoned. "Y" was disarmed and stricken in May 1909. French submarine Y The French submarine "Y" was a single-hull experimental submarine designed by Louis-Émile Bertin for the French Navy. She was launched in July 1905 but was never commissioned and remained in experimental status. A planned refit, which included adding an electric motor for underwater propulsion in 1907 was cancelled. "Y" was disarmed and stricken on 1 March 1909. "Y" was long, with a beam of and a draught of . The submarine had a surfaced displacement of and