Blanche
| Name | Blanche |
| Type | Sailing vessel
|
| GRT | 3,104 tons |
| Country |  French |
| Built | 1898
|
| Builder | Forges et chantiers de la Méiterranée, Graville-Le Havre
|
| Operator | Ant. Dom. Bordes & Fils, Le Havre
|
| History | Four-masted steel-hulled bark. Built as Emilie Siegfried.
|
U-boat attacks on Sailing vessel Blanche
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 19 Sep 1917 | U 151 (Waldemar Kophamel) | Sunk | Sunk in the Atlantic by a torpedo after an inconclusive gunnery exchange.
| 47° 00'N, 10° 30'W
| La Pallice - Iquique
| in ballast
| 18
|
Position of attack on Blanche
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