Mentor
| Name | Mentor |
| Type | Sailing vessel |
| GRT | 539 tons |
| Country |  Norwegian |
| Built | 1880 |
| Builder | Ole Ribe, Grimstad |
| Operator | A/S Mentor (Jacobsen & Waalman A/S), Kristiania |
| History |
U-boat attacks on Sailing vessel Mentor
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 Jul 1918 | UB 21 (Bruno Mahn) | Sunk | Torpedoed 12 miles E of off Hartlepool | Svelvik – West Hartlepool | pitprops | 1 | |
| Towed to port as floating on her cargo of lumber but CTL. | ||||||||
If you can help us with any additional information on this vessel then please contact us.