Nummer: 00811
| Area : | Western Area |
| Sea area : | North Sea |
| Date of minelaying : | 21.11.1939 |
| Nationality of U-boat : | German |
| U-boat : | U 20 |
| Commander : | Moehle |
| Grid : | AN 7633 |
| presumed target type : | --- |
| presumed tonnage : | ---- --- |
| presumed result : | hit not ascertained |
| Used weapon(s) : | Sea mine(s) |
| Date of sinking : | 10.12.1939 |
| Time of sinking : | 16:00 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Willowpool |
| Year of launch : | 1925 |
| Actual tonnage : | 4815 BRT |
| Actual result : | sunk |
| Position of target : | 3sm E Newarp LV. |