|Operator||Alexis Geffroy, Jean Péron, and Yves Le Troquer. |
|History||Dandy. Built as Ouoloff.|
U-boat attacks on Sailing vessel Yvonne
|1||31 Jan 1917||U 55 (Wilhelm Werner)||Sunk||off Pendeen||Lannion - Cardiff||4|
|Master Alexis Geffroy. Sailed from Lannion on January 20th and never arrived in Cardiff; vessel posted as missing. U 55 stopped and sank by gunnery an unidentified sailing vessel off Pendeen on the evening of January 31st of an estimated 80 grt but didn’t determine it’s exact identity.|
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