Nummer: 00712
| 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) |
| Convoy : | FN.43 |
| Date of sinking : | 29.11.1939 |
| Time of sinking : | 01:30 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Ionian |
| Year of launch : | 1938 |
| Actual tonnage : | 3114 BRT |
| Actual result : | sunk |
| Position of target : | 1.5sm 132° Newarp LV. |
| Convoy : | FN.43 |
| Route of convoy : | Southend - Methil (Firth of Forth) |
| Remark to convoy : | Since Sep 1939 (counter traffic = FS) |