Massilia
| Name | Massilia |
| Type | Hulk |
| GRT | 5,026 tons |
| Country |  Italian |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Hulk Massilia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Mar 1918 | UC 25 (Karl Dönitz) | Sunk | Harbour of Augusta, Sicily | ||||
| Coaling hulk. UC25 mistakenly thought she was attacking CYCLOPS (RN sub tender of 9033 tons) | ||||||||
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