Thelma
| Name | Thelma |
| Type | Steamer |
| GRT | 1,350 tons |
| Country |  Norwegian |
| Built | 1884 |
| Builder | Irvine & Co., West Hartlepool |
| Operator | A/S Thelma (O. T. Tønnevold), Grimstad |
| History |
U-boat attacks on Steamer Thelma
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 6 Apr 1917 | UC 65 (Otto Steinbrinck) | Sunk | Mined 4 miles S3/4W of Owers LV | Tyne - Rouen | coal | 1 |
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