Helvetia
| Name | Helvetia |
| Type | Sailing ship |
| GRT | 673 tons |
| Country |  Norwegian |
| Built | 1871 |
| Builder | E. Knudsen, Stavanger |
| Operator | Norsk Trælasteksport (Løytnant Brun), Christiania |
| History |
U-boat attacks on Sailing ship Helvetia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 9 Sep 1918 | U 80 (Karl Koopmann) | Sunk | 22 miles WSW of Lindesnaes | Holmestrand – Hartlepool | pitprops | 0 | |
| Or early on September 10th. | ||||||||
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