Patrols by U-4
See the profile page for U-4
| Commander | Departure | Arrival | Days | |||||
| 1. | Harro von Klot-Heydenfeldt | 4 Sep, 1939 | Wilhelmshaven | 14 Sep, 1939 | Wilhelmshaven | 11 days | P | View |
| 2. | Harro von Klot-Heydenfeldt | 19 Sep, 1939 | Wilhelmshaven | 29 Sep, 1939 | Kiel | 11 days | P | View |
| 3. | Hans-Peter Hinsch | 16 Mar, 1940 | Kiel | 29 Mar, 1940 | Wilhelmshaven | 14 days | P | View |
| 4. | Hans-Peter Hinsch | 4 Apr, 1940 | Wilhelmshaven | 14 Apr, 1940 | Wilhelmshaven | 11 days | P | View |
4 War patrols (P) located. | ||||||||