A shipwreck containing 200 tonnes of silver worth about 150m has been found in the Atlantic - the largest haul of precious metal ever discovered at sea, BBC reported Monday. The SS Gairsoppa, a UK cargo ship sunk by a German U-boat in 1941, was found by US exploration firm Odyssey Marine. The firm will retain 80% of the cargo's value under the terms of a contract with the Deptment for Transport. The vessel was on its way back to Britain from India when it ran low on fuel in stormy weather, and tried to divert to Galway harbour, but it was spotted and sunk by the German submarine.