Battle of the Atlantic. U-233 (German Type XB Submarine) is rammed by USS Thomas (DE 102), July 5, 1944 in the North Atlantic. Photographed from Thomas as she struck the submarine amidships. Note mine shuts on U-233’s foredeck, a feature of the type of XB U-Boats. Official U.S. Navy Photograph, now in the collections of the National Archives. (2017/02/14).