Nummer: 27013
| Area : | Indic Ocean |
| Date of attack : | 07.08.1943 |
| Time of attack : | 11:16 |
| Nationality of U-boat : | German |
| U-boat : | U 181 |
| Commander : | Lüth |
| Grid : | KG 5878 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 4000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 07.08.1943 |
| Time of observation : | 07:25 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Umvuma |
| Year of launch : | 1914 |
| Actual tonnage : | 4419 BRT |
| Actual result : | sunk |
| Position of target : | 20.18s 57.14e |