Neptune
| Name | Neptune |
| Type | Fishing vessel (smack) |
| GRT | 50 tons |
| Country |  British |
| Built | 1889 |
| Builder | ?, Galmpton |
| Operator | Martin Ashe, Dublin |
| History |
U-boat attacks on Fishing vessel (smack) Neptune
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 Dec 1917 | U 80 (Karl Scherb) | Sunk | Mined 4.5 miles N of Black Head (barrage 93 laid May 10, 1917) | 4 |
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