Historical records indicate the Gairsoppa was carrying up to seven million ounces of silver and the Mantola was carrying approximately 600,000 ounces of silver when each sank. Odyssey discovered both shipwrecks in Q3 2011 and conducted a series of reconnaissance dives to both sites in March and April 2012. Both the Gairsoppa and Mantola projects are being conducted under contract with the UK Department for Transport. Under these contracts, which follow standard commercial practices, Odyssey will retain 80% of the net salved value of the cargoes after recovery of expenses.