Nummer: 04304
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 17.02.1941 |
| Time of attack : | 00:08 |
| Nationality of U-boat : | German |
| U-boat : | U 101 |
| Commander : | Mengersen |
| Grid : | BE 3437 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 6000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | SL.64 s |
| Date of observation : | 16.02.1941 |
| Time of observation : | 20:30 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Gairsoppa |
| Year of launch : | 1919 |
| Actual tonnage : | 5237 BRT |
| Actual result : | sunk |
| Position of target : | 300sm SW Galway |
| Convoy : | SL.64 s |
| Route of convoy : | Sierra Leone (Freetown) - United Kingdom (Liverpool) |
| Remark to convoy : | Since Sep 1939; from May 1943 combined with MKS in Atlantic, counter traffic = OS. |