Battle of the Atlantic. U-233 (German Type XB Submarine) about to be rammed by USS Thomas (DE 102) in the North Atlantic, July 5, 1944. Photographed from Thomas’ bridge, as she approaches to ram the submarine amidships. Note “hump” of mine chutes on U-233’s foredeck, a feature of the type XB boats. Official U.S. Navy Photograph, now in the collections of the National Archives. (2017/02/14).