In July 1942, German submarine U-576 sank the freighter SS Bluefields during the battle of Convoy KS-520 off Cape Hatteras, North Carolina. The convoy and its U.S. military escorts fought back, sinking the U-boat with return fire from a U.S. Navy Armed Guard crew and an aerial depth charge attack. In 2016, scientists returned to the battle site to conduct a comprehensive characterization and interpretation of the shipwrecks and the surrounding battlefield, along with related World War II shipwrecks lost in the area, using advanced data acquisition and visualization technologies. For more information, click here. Video courtesy of John McCord, UNC Coastal Studies Institute/NOAA - Battle of the Atlantic expedition.