Nummer: 00513
| Area : | Western Area |
| Sea area : | Gibraltar Area |
| Date of attack : | 24.10.1939 |
| Time of attack : | 11:19 |
| Nationality of U-boat : | German |
| U-boat : | U 37 |
| Commander : | Hartmann |
| Grid : | CG 9449 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 4413 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 24.10.1939 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Tafna |
| Year of launch : | 1930 |
| Actual tonnage : | 4413 BRT |
| Actual result : | sunk |
| Position of target : | 35.44n 07.23w |
