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On August 27th, 1918, a Greek sailing vessel of 14 tons (reg.No.C57A), was sunk by the German submarine UC-37 (Otto Kümpel).
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References
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Sailing vessel C57a – Ships hit by U-boats – German and Austrian U-boats of World War One – Kaiserliche Marine – uboat.net [WWW Document], n.d. URL https://uboat.net/wwi/ships_hit/7624.html (accessed 9.8.21).
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WRECKSITE – C57A 1918 [WWW Document], n.d. URL https://wrecksite.eu/wreck.aspx?177396 (accessed 9.8.21).