Principe Umberto
| Name | Principe Umberto |
| Type | Troopship |
| GRT | 7,929 tons |
| Country |  Italian |
| Built | 1909 |
| Builder | Cantieri Navali Riuniti, Palermo |
| Operator | Navigazione Generale Italiana, Genoa |
| History |
U-boat attacks on Troopship Principe Umberto
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 8 Jun 1916 | k.u.k. U5 (Friedrich Schlosser) | Sunk | Torpedoed 15 miles SW of Linguetta, Adriatic | 40° 19'N, 19° 10'E | 1926 | ||
| Figures of casualties vary; some sources give 1990 dead. | ||||||||
Position of attack on Principe Umberto
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