High Quality Content by WIKIPEDIA articles! Lieutenant Commander Georg Lassen (born May 12, 1915) is a former German U-boat captain who served with the Kriegsmarine during World War II. He was a Watchkeeping Officer on U-29 at the outbreak of the war and later the skipper of the U-160 and winner of the Iron Cross. He sank 26 ships for a total of 156,082 gross register tons (GRT) during 4 patrols, leading to a remarkable average of 39,020 GRT per patrol. His total tonnage made him the 10th most successful U-boat ace of the war.