Kergroise was built in 1918 as the German patrol vessel SMS Bunnemann.

Allocated to the French Navy in 1920, she was sold in 1921, becoming the fishing trawler Kergroise.

[3] Bunnemann was built as yard number 108 by Schiffsbau & Maschinenfabrik Hansa, Tönning for the Kaiserliche Marine.

She was owned by the Société des Pêcheries de St. Pierre et Miquelon.

[2] In 1931, she was sold to the Compagnie Laurentaise de Chalutage, Lorient, Morbihan, France.

[4] The fishing boat registration L 2109 was allocated,[1] In 1934, her Code Letters were changed to FNVH.