Diu
| Name | Diu |
| Type | Steamer |
| GRT | 5,556 tons |
| Country |  Portuguese |
| Built | 1901 |
| Builder | Flensburger Schiffbau Ges., Flensburg |
| Operator | Transportes Maritimos do Estado, Lisbon |
| History |
U-boat attacks on Steamer Diu
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 13 Oct 1917 | U 57 (Carl-Siegfried Ritter von Georg) | Sunk | 4 miles S (mag) of Tuskar | Limerick - Port Talbot | in ballast |
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