Adelaide
| Name | Adelaide |
| Type | Sailing vessel |
| GRT | 180 tons |
| Country |  British |
| Built | 1869 |
| Builder | Tredwen, Padstow |
| Operator | A. E. Benney, Fowey |
| History | Wooden schooner. |
U-boat attacks on Sailing vessel Adelaide
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 Mar 1917 | U 48 (Berndt Buß) | Damaged | Stopped 42 miles NWxN of Cherburg. Attempts to sink the sailing vessel via gunnery failed and she towed into Brixham. | in ballast | 0 |
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