Nummer: 00520
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 30.10.1939 |
| Time of attack : | 11:30 |
| Nationality of U-boat : | German |
| U-boat : | U 37 |
| Commander : | Hartmann |
| Grid : | BF 1711 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 3693 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 30.10.1939 |
| Time of observation : | 13:33 |
| Nationality of target : | Greek |
| Actual type of target : | Steam Freighter |
| Name of target : | Thrasyvoulos |
| Year of launch : | 1912 |
| Actual tonnage : | 3693 BRT |
| Actual result : | sunk |
| Position of target : | 49.25n 11.18w |
