Jupiter I
| Name | Jupiter I |
| Type | Navy trawler |
| GRT | 263 tons |
| Country |  French |
| Built | 1913 |
| Builder | J. Duthie Torry SB. Co., Aberdeen |
| Operator | French Navy |
| History | Peace-time operator: P. Gufflet, La Rochelle |
U-boat attacks on Navy trawler Jupiter I
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 10 Jul 1917 | UB 12 (Ernst Steindorff) | Sunk | Mined off Calais (barrage 398) | 50.59N, 01.47E | 10 |
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