An American company has made what is being called the heaviest and deepest recovery of precious metals from a shipwreck. The Tampa, Fla.-based Odyssey Marine Exploration announced Wednesday that it had recovered 48 tons of silver bullion from the SS Gairsoppa, a sunken British cargo ship three miles underwater off the coast of Ireland. Between the Gairsoppa, torpedoed by a German U-boat during World War II, and the SS Mantola, sunk by a German submarine during World War I, Odyssey said in a press release that about 240 tons of silver may be recovered by the end of the operation.

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