Nummer: 01509
| Area : | Western Area |
| Sea area : | North Sea |
| Date of attack : | 29.02.1940 |
| Time of attack : | 22:32 |
| Nationality of U-boat : | German |
| U-boat : | U 20 |
| Commander : | Klot-Heydenfeldt |
| Grid : | AN 8730 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 4500 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 29.02.1940 |
| Nationality of target : | Italian |
| Actual type of target : | Steam Freighter |
| Name of target : | Maria Rosa |
| Year of launch : | 1914 |
| Actual tonnage : | 4211 BRT |
| Actual result : | sunk |
| Position of target : | 52.24n 01.59e |
Steam Freighter Maria Rosa ex Greek Triton (bis 1939)