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

Columns: Number | Name | Rank | Unit | Date of award | Notes
1 | Günther Prien | Kapitänleutnant | commander of U-47 | 18 October 1939 | Awarded 5th Oak Leaves on 20 October 1940 | 2 | Herbert Schultze | Kapitänleutnant | commander of U-48 | 1 March 1940 | Awarded 15th Oak Leaves on 12 June 1941 | 3 | Karl Dönitz | Konteradmiral | commander in chief of U-boat operations Befehlshaber der U-Boote | 21 April 1940 | Awarded 223rd Oak Leaves on 6 April 1943 | 4 | Werner Hartmann | Korvettenkapitän | commander of U-37 | 9 May 1940 | Awarded 645th Oak Leaves on 5 November 1944 | 5 | Otto Schuhart | Kapitänleutnant | commander of U-29 | 16 May 1940 | 6 | Wilhelm Rollmann | Kapitänleutnant | commander of U-34 | 31 July 1940 | killed in action 5 November 1943 | 7 | Otto Kretschmer | Kapitänleutnant | commander of U-99 | 4 August 1940 | Awarded 6th Oak Leaves on 4 November 1940 and 5 . Swords on 26 December 1941

Example questions:
How many total U-boat types were commanded by the commander of the submarine launched in July 1936 , who received the Knight 's Cross of the Iron Cross ? | Which person in the U-boat service who received the Knight 's Cross of the Iron Cross and awarded on 24 October 1940 died more recently ?

Answers:
3 | Heinrich Bleichrodt