Nummer: 01720
| Area : | Western Area |
| Sea area : | North Sea |
| Date of attack : | 11.05.1940 |
| Time of attack : | 14:00 |
| Nationality of U-boat : | German |
| U-boat : | U 9 |
| Commander : | Lüth |
| Grid : | AN 8749 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 4000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 11.05.1940 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Tringa |
| Year of launch : | 1925 |
| Actual tonnage : | 1930 BRT |
| Actual result : | sunk |
| Position of target : | 51.21n 02.25e |
