Kotka
| Name | Kotka |
| Type | Sailing vessel |
| GRT | 952 tons |
| Country |  Norwegian |
| Built | 1861 |
| Builder | T. R. Oswald, Sunderland |
| Operator | Lars Haugland, Fredriktad |
| History |
U-boat attacks on Sailing vessel Kotka
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Jun 1915 | U 39 (Walter Forstmann) | Damaged | 30 miles SWxW of Bull Light. Beach but later refloated and returned to service. | Stockton Springs ME – Cork | timber | 0 |
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