Merganser
| Name | Merganser |
| Type | Steamer |
| GRT | 1,905 tons |
| Country |  British |
| Built | 1908 |
| Builder | Swan, Hunter & Wigham Richardson, Ltd., Newcastle |
| Operator | Cork SS. Co., Ltd., Cork |
| History |
U-boat attacks on Steamer Merganser
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 20 Nov 1915 | U 33 (Konrad Gansser) | Sunk | 40 miles WNW of Gozo Island | 36.30N, 13.00E | Clyde - Alexandria | coal & general cargo | 0 |
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