| U-146 | Type IID |
| Feldpost Number | M 28 136 |
| Construction Yard | Deutsche Werke AG, Kiel-Gaarden |
| Yard Number | 275 |
| Ordered | 25th Sep 1939 |
| Keel laid | 30th Mar 1940 |
| Launched | 21st Sep 1940 |
| Commissioned | 30th Oct 1940 |
| Baubelehrung | Baubelehrung U-Boote Ostsee, Kiel |
| Training, Flotillas and Duties |
| 10.40 - 12.40 | 1.U-Flottille, Kiel Ausbildungsboot (under training)
|
| 01.41 - 06.41 | 22.U-Flottille, Gotenhafen Schulboot (training boat)
|
| 06.41 - 07.41 | 3.U-Flottille, La Pallice Frontboot (operational)
|
| 08.41 - 05.45 | 22.U-Flottille, Gotenhafen.Wilhelmshaven Schulboot (training boat)
|
| Commanders |
| 10.40 - 04.41 | KL Eberhard Hoffmann see also: U-451 |
| 04.41 - 08.41 | OL Otto Ites see also: U-94 |
| 08.41 - 10.41 | LT Ewald Hülsenbeck see also: U-121 U-1209 |
| 10.41 - 06.42 | OL Wilhelm Grimme see also: U-116 |
| 06.42 - 08.42 | OL Gerth Gemeiner see also: U-137 U-154 |
| 09.42 - 10.42 | OL Jürgen Nissen see also: U-105 |
| 11.42 - 07.43 | OL Erich Hilsenitz see also: U-108 U-146 |
| 07.43 - 12.44 | LT Herbert Waldschmidt |
| 12.44 - 04.45 | OL Helmuth Wüst |
| 03.45 - 05.45 | OL Carl Schauroth see also: U-142 |