Poseidon
| Name | Poseidon |
| Type | Steamer |
| GRT | 2,589 tons |
| Country |  Greek |
| Built | 1893 |
| Builder | Richardson, Duck & Co., Stockton |
| Operator | N. P. Roussos & Co., Syra |
| History |
U-boat attacks on Steamer Poseidon
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Mar 1917 | UC 65 (Otto Steinbrinck) | Sunk | 52° 27'N, 5° 12'W | Les Falaises - Barrow | iron ore | 0 |
Position of attack on Poseidon
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