Adolf
| Name | Adolf |
| Type | Sailing vessel |
| GRT | 169 tons |
| Country |  Russian |
| Built | 1901 |
| Builder | P. Krause, Adiamunde |
| Operator | J. Ekhis, Riga |
| History |
U-boat attacks on Sailing vessel Adolf
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 5 Jun 1915 | U 19 (Constantin Kolbe) | Sunk | 30 miles off Rattray Head | Middelsbrough - Arkhangelsk | salt | ||
| or ADOLUF | ||||||||
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