Pentyrch
| Name | Pentyrch |
| Type | Steamer |
| GRT | 3,312 tons |
| Country |  British |
| Built | 1899 |
| Builder | Richardson, Duck & Co., Stockton |
| Operator | Pentwyn SS. Co., Ltd. (F. H. Lambert, Barnett & Co.), London (Cardiff) |
| History |
U-boat attacks on Steamer Pentyrch
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Apr 1918 | UB 40 (Karl Dobberstein) | Sunk | 5 miles WNW of Brighton LV | Tyne - Genoa | coal | 1 |
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