Nummer: 00903
| Area : | Western Area |
| Sea area : | North Sea |
| Date of minelaying : | 01.12.1939 |
| Nationality of U-boat : | German |
| U-boat : | U 61 |
| Commander : | Oesten |
| Grid : | AN 5453 |
| presumed target type : | --- |
| presumed tonnage : | ---- --- |
| presumed result : | hit not ascertained |
| Used weapon(s) : | Sea mine(s) |
| Date of sinking : | 22.12.1939 |
| Time of sinking : | 13:40 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Gryfevale |
| Year of launch : | 1929 |
| Actual tonnage : | 4434 BRT |
| Actual result : | damaged |
| Position of target : | 3sm E Tine Pier |