HMD Hastfen
| Name | HMD Hastfen |
| Type | Navy Drifter |
| GRT | 77 tons |
| Country |  British |
| Built | 1911 |
| Builder | Killybegs, Co. Donegal |
| Operator | Royal Navy |
| History | Wooden-hulled. Peace-time operator; H. Fenner Lyd, Great Yarmouth |
U-boat attacks on Navy Drifter Hastfen
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 24 Sep 1917 | UC 11 (Karl Dobberstein) | Sunk | Mined South of the Shipwash Sand | 4 | |||
| Barrage 473 | ||||||||
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