Arca
| Name | Arca |
| Type | Tanker |
| GRT | 4,839 tons |
| Country |  British |
| Built | 1912 |
| Builder | Palmers’ SB. & Iron Co., Ltd., Newcastle |
| Operator | Anglo-Saxon Petroleum Co., Ltd., London |
| History |
U-boat attacks on Tanker Arca
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 6 Jan 1918 | UC 75 (Johannes Lohs) | Damaged | 10 miles off Start Point | Southampton - Devonport | 0 | ||
| 2 | 2 Oct 1918 | U 118 (Herbert Stohwasser) | Sunk | Torpedoed 40 miles NWxW of Tory Island | 55.45N, 07.35W | Philadelphia - Portishead | benzine | 52 |
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