List of Knight's Cross of the Iron Cross recipients of the U-boat service

Columns: Number | Name | Rank | Unit | Date of award
51 | Heinrich Lehmann-Willenbrock | Kapitänleutnant | commander of U-96 | 31 December 1941 | 56 | Reinhard Suhren | Oberleutnant zur See | commander of U-564 | 31 December 1941 | 87 | Erich Topp | Kapitänleutnant | commander of U-552 | 11 April 1942 | 89 | Reinhard Hardegen | Kapitänleutnant | commander of U-123 | 23 April 1942 | 104 | Rolf Mützelburg | Kapitänleutnant | commander of U-203 | 15 July 1942 | 105 | Adalbert Schnee | Kapitänleutnant | commander of U-201 | 15 July 1942 | 123 | Klaus Scholtz | Korvettenkapitän | commander of U-108 | 10 September 1942

Example questions:
How many U-boats were commanded by the youngest Knight 's Cross of the Iron Cross person to receive an award on 15 July 1942 ? | Where was the U-boat commanded by the youngest Knight 's Cross of the Iron Cross oberleutnant zur See sunk ? | On which U-boat was the last person to receive an Iron Cross the Watch Officer ? | When was the U-boat commanded by the oldest Knight 's Cross of the Iron Cross korvettenkapitän launched ?

Answers:
5 | Bay of Biscay | U-29 | 22 October