Louis Bossert
| Name | Louis Bossert |
| Type | Sailing vessel |
| GRT | 605 tons |
| Country |  Norwegian |
| Built | 1904 |
| Builder | Kelly, Spear & Co., Bath ME |
| Operator | A/S Louis Bossert (Kr. Walderhaug), Ålesund |
| History |
U-boat attacks on Sailing vessel Louis Bossert
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 24 Sep 1917 | U 54 (Kurt Heeseler) | Sunk | Bay of Biscay | 45.11N, 09.35W | Bordeaux – Cadiz | in ballast | 0 |
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