Coalgas
| Name | Coalgas |
| Type | steamer |
| GRT | 2,257 tons |
| Country |  British |
| Built | 1890 |
| Builder | Short Bros., Sunderland |
| Operator | Gas, Light & Coke Co. (Stephenson Clarke & Co., mgrs.), London |
| History |
U-boat attacks on steamer Coalgas
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 5 Mar 1918 | UC 4 (Ernst Berlin) | Sunk | Mined 5 miles SxW Shipwash LV | London - Tyne | in ballast | 0 |
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