HMD Boy Harold
| Name | HMD Boy Harold |
| Type | Navy Drifter |
| GRT | 74 tons |
| Country |  British |
| Built | 1911 |
| Builder | ?, Lowestoft |
| Operator | Royal Navy |
| History | Peace-time operator: C. Turrell Day, Lowestoft
|
U-boat attacks on Navy Drifter Boy Harold
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Mar 1916 | UC 12 (Eberhard Fröhner) | Sunk | Mined off Brindisi | 7 |
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