German U-boat from ILN, 1943/01/16

German U-boat ca. 1939, from National Cryptologic Museum

Battle of the Atlantic map ca. 1942

"Atlantic Convoy," cover of Life, 1942/07/27

Poster featuring Atlantic convoy from Life, 1943

escort carrier Long Island, ILN 1942/05/30

Images Source: Illustrated London News; and National Archives, Patch Collection; and Naval Historical Center, Photographic Section