Patrols by U-303
See the profile page for U-303
| Commander | Departure | Arrival | Days | |||||
| 1. | Kptlt. Karl-Franz Heine | 31 Dec, 1942 | Kiel | 8 Mar, 1943 | Lorient | 68 days | P | View |
| 2. | Kptlt. Karl-Franz Heine | 1 Apr, 1943 | Lorient | 15 Apr, 1943 | La Spezia | 15 days | P | View |
| 3. | Kptlt. Karl-Franz Heine | 23 Apr, 1943 | La Spezia | 24 Apr, 1943 | Toulon | 2 days | ||
| 4. | Kptlt. Karl-Franz Heine | 21 May, 1943 | Toulon | 21 May, 1943 | Sunk | 1 days | ||
2 War patrols (P) located. | ||||||||