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

Columns: Number | Name | Rank | Unit | Date of award
125 | Heinrich Bleichrodt | Kapitänleutnant | commander of U-109 | 23 September 1942 | 142 | Wolfgang Lüth | Kapitänleutnant | commander of U-181 | 13 November 1942 | 147 | Karl-Friedrich Merten | Korvettenkapitän | commander of U-68 | 16 November 1942 | 171 | Friedrich Guggenberger | Kapitänleutnant | commander of U-81 | 8 January 1943 | 177 | Johann Mohr | Kapitänleutnant | commander of U-124 | 13 January 1943 | 208 | Georg Lassen | Kapitänleutnant | commander of U-160 | 7 March 1943

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