Nummer: 15311
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 04.03.1943 |
| Time of attack : | 06:09 |
| Nationality of U-boat : | German |
| U-boat : | U 172 |
| Commander : | Emmermann |
| Grid : | CD 3239 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 9000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 03.03.1943 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | City of Pretoria |
| Year of launch : | 1937 |
| Actual tonnage : | 8049 BRT |
| Actual result : | sunk |
| Position of target : | 41.45n 42.30w |
