HMD Great Heart
| Name | HMD Great Heart |
| Type | Navy Drifter |
| GRT | 78 tons |
| Country |  British |
| Built | 1911 |
| Builder | Rose Street Foundry & Engineering Co., Inverness |
| Operator | Royal Navy |
| History | Peace-time operator: A. Main, R. Finlayson, J. M. Bochel & W. Davidson, Nairn. Spelling also given as Greatheart. |
U-boat attacks on Navy Drifter Great Heart
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 24 Sep 1915 | UC 6 (Matthias Graf von Schmettow) | Sunk | Mined east of the South Goodwin LV | 8 |
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