Patrols by U-21
See the profile page for U-21
| Commander | Departure | Arrival | Days | Tons | |||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kptlt. Fritz Frauenheim | 25 Aug 1939 | Wilhelmshaven | 5 Sep 1939 | Wilhelmshaven | 12 days | P | View | |
| 2 | Kptlt. Fritz Frauenheim | 9 Sep 1939 | Wilhelmshaven | 1 Oct 1939 | Wilhelmshaven | 23 days | P | View | |
| Kptlt. Fritz Frauenheim | 2 Oct 1939 | Wilhelmshaven | 3 Oct 1939 | Kiel | 2 days | ||||
| 3 | Kptlt. Fritz Frauenheim | 22 Oct 1939 | Kiel | 8 Nov 1939 | Kiel | 18 days | 13,766 | P | View |
| 4 | Kptlt. Fritz Frauenheim | 27 Nov 1939 | Kiel | 5 Dec 1939 | Kiel | 9 days | 4,260 | P | View |
| 5 | Kptlt. Fritz Frauenheim | 17 Dec 1939 | Kiel | 24 Dec 1939 | Kiel | 8 days | 2,827 | P | View |
| 6 | Kptlt. Wolf-Harro Stiebler | 27 Jan 1940 | Kiel | 9 Feb 1940 | Wilhelmshaven | 14 days | 1,353 | P | View |
| 7 | Kptlt. Wolf-Harro Stiebler | 21 Mar 1940 | Wilhelmshaven | 27 Mar 1940 | Mandal, Norway | 7 days | P | View | |
| Kptlt. Wolf-Harro Stiebler | 16 Apr 1940 | Kristiansand | 20 Apr 1940 | Kiel | 5 days | ||||
| 91 days | 22,206 | ||||||||
7 War patrols (P) located. 91 days at sea during patrols (98 days at sea overall). War patrols are shown with grey background. Tons indicate tonnage of ships sunk or damaged during the patrol, if any. Warships are included. | |||||||||