Nummer: 00411
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 13.10.1939 |
| Nationality of U-boat : | German |
| U-boat : | U 42 |
| Commander : | Dau |
| Grid : | BE 3749 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 4803 BRT |
| presumed result : | damaged |
| Used weapon(s) : | Gunfire |
| Convoy : | OB.17 d |
| Date of observation : | 13.10.1939 |
| Time of observation : | 07:30 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Stonepool |
| Year of launch : | 1928 |
| Actual tonnage : | 4803 BRT |
| Actual result : | damaged |
| Position of target : | 48.40n 15.30w |
| Convoy : | OB.17 d |
| Route of convoy : | Liverpool - North America (out) |
| Remark to convoy : | Sep 1939 to Jul 1940 via South Ireland, Jul to Okt 1940 via North Cannel, then ON. |