Over the last 30 years, hydrographical marine surveys in the English Channel helped uncover the potential wreck sites of German submarines, or U-boats, sunk during the conflicts of World War I and World War II. Through a series of systemic dives, nautical archaeologist and historian Innes McCartney surveyed and recorded these wrecks, discovering that the distribution and number of wrecks conflicted with the published histories of U-boat losses...