English
| U-4 | Type IIA |
| Feldpost Number | M 13 167 |
| Construction Yard | Deutsche Werke AG, Kiel-Gaarden |
| Yard Number | 239 |
| Ordered | 2nd Feb 1935 |
| Keel laid | 11th Feb 1935 |
| Launched | 31st Jul 1935 |
| Commissioned | 17th Aug 1935 |
| Baubelehrung | Marinelehr-und Reparaturwerkstatt, Kiel |
| Training, Flotillas and Duties | |
| 08.35 – 06.40 | U-Schule Flottille, Neustadt Schulboot (training boat) Frontboot (operational) |
| 07.40 – 07.44 | 21.U-Flottille, Pillau Schulboot (training boat) |
| Commanders | |
| 17.08.35 – 29.09.37 | OL ~ KL Hannes Weingärtner see also: U-10 U-16 U-851 |
| 30.09.37 – 28.10.38 | OL ~ KL Hans-Wilhelm von Dresky see also: U-33 |
| 29.10.38 – 16.01.40 | OL ~ KL Harro von Klot-Heydenfeldt see also: U-20 U-102 |
| 17.01.40 – 07.06.40 | OL Hans-Peter Hinsch see also: U-140 U-569 |
| 08.06.40 – 28.07.40 | OL Heinz-Otto Schultze see also: U-141 U-432 U-849 |
| 29.07.40 – 02.02.41 | OL Hans-Jürgen Zetzsche see also: U-20 U-8 U-560 U-591 U-378 |
| 03.02.41 – 08.12.41 | OL Hinrich Oscar Bernbeck see also: U-461 UD-4 U-638 |
| 09.12.41 – 15.06.42 | OL Wolfgang Leimkühler |
| 16.06.42 – 23.01.43 | LT Friedrich-Wilhelm Marienfeld see also: U-1228 |
| 24.01.43 – 31.05.43 | LT Joachim Düppe see also: U-2505 |
| 01.06.43 – 22.08.43 | OL Paul Sander see also: U-38 U-72 |
| 23.08.43 – 05.44 | LT ~ OL Herbert Mumm see also: U-236 |
| 05.44 – 09.07.44 | OL Hubert Rieger |
Đánh giá
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