HMT Erin Ii
| Name | HMT Erin Ii |
| Type | Navy Trawler |
| GRT | 181 tons |
| Country |  British |
| Built | 1903 |
| Builder | Cook, Welton & Gemmell, Beverley |
| Operator | Royal Navy |
| History | Peace-time operator: Great Northern Steamship Fishing Co. Ltd., Hull |
U-boat attacks on Navy Trawler Erin Ii
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Oct 1915 | UC 5 (Herbert Pustkuchen) | Sunk | Mined off the Nab LV | 7 |
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