Sylvania
| Name | Sylvania |
| Type | Fishing vessel (sail) |
| GRT | 136 tons |
| Country |  American |
| Built | 1910 |
| Builder | ?, Glouchester, Mass. |
| Operator | Jeffry F. Thomas et al, Glouchester, Mass. |
| History | Wooden schooner |
U-boat attacks on Fishing vessel (sail) Sylvania
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Aug 1918 | U 156 (Richard Feldt) | Sunk | Stopped and scuttled by Triumph 90 miles SE of Cape Canso, Nova Scotia | fishing | 0 | ||
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