Patrols by U-673
See the profile page for U-673
| Commander | Departure | Arrival | Days | |||||
| 1. | Oblt. Heinz-Gerd Sauer | 15 Feb, 1944 | Kiel | 18 Feb, 1944 | Bergen | 4 days | ||
| 2. | Oblt. Heinz-Gerd Sauer | 20 Feb, 1944 | Bergen | 27 Feb, 1944 | Narvik | 8 days | P | View |
| 3. | Oblt. Heinz-Gerd Sauer | 29 Feb, 1944 | Narvik | 2 Mar, 1944 | Trondheim | 3 days | ||
| 4. | Oblt. Heinz-Gerd Sauer | 24 Mar, 1944 | Trondheim | 26 Mar, 1944 | Narvik | 3 days | ||
| 5. | Oblt. Heinz-Gerd Sauer | 27 Mar, 1944 | Narvik | 4 Apr, 1944 | Narvik | 9 days | P | View |
| 6. | Oblt. Heinz-Gerd Sauer | 6 Apr, 1944 | Narvik | 9 Apr, 1944 | Trondheim | 4 days | ||
| 7. | Oblt. Heinz-Gerd Sauer | 19 May, 1944 | Trondheim | 21 May, 1944 | Narvik | 3 days | ||
| 8. | Oblt. Heinz-Gerd Sauer | 29 May, 1944 | Narvik | 31 May, 1944 | Trondheim | 3 days | ||
| 9. | Oblt. Heinz-Gerd Sauer | 4 Jun, 1944 | Trondheim | 24 Jul, 1944 | St. Nazaire | 51 days | P | View |
| 10. | Oblt. Ernst-August Gerke | 14 Sep, 1944 | St. Nazaire | 19 Oct, 1944 | Bergen | 36 days | P | View |
| 11. | Oblt. Ernst-August Gerke | 22 Oct, 1944 | Bergen | 24 Oct, 1944 | Sunk | 3 days | P | View |
5 War patrols (P) located. | ||||||||