Nummer: 01719
| Area : | Western Area |
| Sea area : | North Sea |
| Date of attack : | 11.05.1940 |
| Time of attack : | 00:49 |
| Nationality of U-boat : | German |
| U-boat : | U 9 |
| Commander : | Lüth |
| Grid : | AN 8749 |
| presumed target type : | Tanker |
| presumed tonnage : | 6000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 11.05.1940 |
| Nationality of target : | Estonian |
| Actual type of target : | Steam Freighter |
| Name of target : | Viiu |
| Year of launch : | 1917 |
| Actual tonnage : | 1908 BRT |
| Actual result : | sunk |
| Position of target : | Westhinder Buoy |
