A British salvage team recently recovered $50 million in silver coins that had rested nearly 17,000 feet beneath the surface of the Atlantic Ocean for more than 70 years, victims of a World War II U-boat attack.
The SS City of Cairo was carrying 100 tons of silver coins from Bombay to England when it was torpedoed 480 miles south of St. Helena, about 2,500 miles east of Rio de Janeiro, by German submarine U-68.
The silver rupees, which belonged to the British Treasury, had been called in by London to help fund the war effort, according to the BBC.
The recovery marks the deepest salvage operation in history.
The City of Cairo was cruising in the remote South Atlantic on Nov. 6, 1942, when the steamship’s tall plume of smoke was spotted by U-68. Captain Karl-Friedrich Merten ordered a single torpedo fired at the vessel, then waited 20 minutes for the 311 passengers and crew to take to the lifeboats before firing a second torpedo.
Merten famously directed them to the nearest land and said: “Goodnight. Sorry for sinking you,” according to the BBC.
While just six of 311 people aboard the City of Cairo died in the sinking, it would be three weeks before any of the six lifeboats would be located, with the last lifeboat at sea for 51 days before being found. During that time 104 of the 305 survivors died.