Patrols by U-51
See the profile page for U-51
| Commander | Departure | Arrival | Days | |||||
| 1. | Kptlt. Dietrich Knorr | 17 Jan, 1940 | Kiel | 8 Feb, 1940 | Wilhelmshaven | 23 days | P | View |
| 2. | Kptlt. Dietrich Knorr | 11 Mar, 1940 | Wilhelmshaven | 22 Apr, 1940 | Kiel | 43 days | P | View |
| 3. | Kptlt. Dietrich Knorr | 6 Jun, 1940 | Kiel | 5 Jul, 1940 | Kiel | 30 days | P | View |
| 4. | Kptlt. Dietrich Knorr | 9 Aug, 1940 | Kiel | 20 Aug, 1940 | Sunk | 12 days | P | View |
4 War patrols (P) located. | ||||||||