Fritz Frauenheim Ships attacked Ships attacked

| Date_ | U_boat | Name_ | Nationality | Tonnage_GRT | Fate |
|---|---|---|---|---|---|
| 21 November 1939 | U-21 | HMSBelfast | UK | 11500 | Damaged (mine) |
| 1 December 1939 | U-21 | Mercator | Finland | 4620 | Sunk |
| 21 December 1939 | U-21 | Carl Henckel | Sweden | 1352 | Sunk |
| 21 December 1939 | U-21 | HMS Bayonet | UK | 605 | Sunk (mine) |
| 21 December 1939 | U-21 | Mars | Sweden | 1475 | Sunk |
| 31 January 1940 | U-21 | Vidar | Denmark | 1353 | Sunk |
| 24 February 1940 | U-21 | Royal Archer | UK | 2266 | Sunk (mine) |
| 26 May 1940 | U-101 | Stanhall | UK | 4831 | Sunk |
| 31 May 1940 | U-101 | Orangemoor | UK | 5775 | Sunk |
| 2 June 1940 | U-101 | Polycarp | UK | 3577 | Sunk |
| 11 June 1940 | U-101 | Mount Hymettus | Greece | 5820 | Sunk |