HMY Zarefah
| Name | HMY Zarefah |
| Type | Navy Yacht |
| GRT | 279 tons |
| Country |  British |
| Built | 1905 |
| Builder | George Brown & Co., Greenock |
| Operator | Royal Navy |
| History | Peace-time operator: ?. Built as Maretanza V for J. Denison-Pender. |
U-boat attacks on Navy Yacht Zarefah
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 8 May 1917 | UC 31 (Otto von Schrader) | Sunk | Mined 1 mile NE of Mull Head, Deerness | 16 | |||
| Wreck located in 2002. | ||||||||
If you can help us with any additional information on this vessel then please contact us.