Os
| Name | Os |
| Type | Steamer |
| GRT | 637 tons |
| Country |  Norwegian |
| Built | 1916 |
| Builder | Larvik Slip & Verksted, Larvik |
| Operator | A/S D/S Os (L. Christiansen), Bergen |
| History |
U-boat attacks on Steamer Os
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Mar 1917 | U 60 (Karl Georg Schuster) | Sunk | 25 miles NWxN of Noup Head, Orkney Islands | Llanelly - Kristiansand | coal & alumina | 0 |
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