During our exploration of the Dry Tortugas, E/V Nautilus dove on the wreck of a German U-boat. It had an unusual history - it didn't begin production until the middle of 1944 and wasn't commissioned until October of that year. It conducted a grand total of zero war patrols before surrendering to Allied forces in May of 1945. After a few stops in Europe, ownership of the sub was turned over to the U.S. Navy for research on the U-boat's design and on potential antisubmarine warfare tactics. Learn more about U-2513 more here, or watch full video highlights from the dive here.