Urna
| Name | Urna |
| Type | Steamer |
| GRT | 2,686 tons |
| Country |  Norwegian |
| Built | 1903 |
| Builder | Russell & Co., Port Glasgow |
| Operator | Aalesunds Dampsks. Rederi A/S (Hj. Wesenberg), Aalesund |
| History |
U-boat attacks on Steamer Urna
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 May 1917 | UC 21 (Reinhold Saltzwedel) | Sunk | 10 miles E by N of Cabo Prior | Melilla - Barrow | iron ore | 0 |
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