A Royal Navy nuclear submarine and a French vessel have been damaged in a collision deep below the surface of the Atlantic Ocean. HMS Vanguard and Le Triomphant, which were both said to have been carrying nuclear missiles, are believed to have crashed while submerged on 3 or 4 February, according to reports. The submarines had a total of around 250 sailors on board…”They can’t see each other in the water,” an official said. The collision raises questions about the submarines’ sonar and radar and why they did not detect one another. Vanguard, one of Britain’s four V-class submarines that make up the Trident nuclear deterrent, was said to have visible dents on her hull as she was towed home last night. Triomphant’s sonar dome was reported to be extensively damaged.