Odyssey Marine Exploration, Inc. is an American company engaged in deep-ocean exploration with a focus on the exploration, development and validation of subsea mineral resources. Starting out as a shipwreck pioneer, Odyssey has discovered some of the most famous deep-ocean shipwrecks in history, including Ancona, Gairsoppa, Nuestra Señora de las Mercedes, Republic, and HMS Victory. Their work has been featured on the Discovery Channel, PBS and National Geographic.

SS Gairsoppa was a British cargo steamship that was built in 1919 and sunk in the Battle of the Atlantic in 1941. 85 of her complement were killed, and only one person survived. When she was sunk, her cargo included 7 million ounces of silver bullion. In 2012 and 2013 a US company recovered part of the bullion, and in 2014 the Royal Mint struck 20,000 silver coins from it.