Mercurius
| Name | Mercurius |
| Type | Dredger |
| GRT | 129 tons |
| Country |  British |
| Built | 1889 |
| Builder | ?, Rotterdam |
| Operator | Tilbury Contracting & Dredging Co. Ltd. (E. Hughes), London |
| History | Listed in the sailing vessel section of the Mercantile Navy List.. |
U-boat attacks on Dredger Mercurius
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Jun 1916 | UC 1 (Kurt Ramien) | Sunk | Mined 3 miles SE of Lowestoft | 6 |
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