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In page HMS Erne (U03):

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On 29 August 1942, Erne, scuttled the Dutch merchant Zuiderkerk with depth charges. The German submarine U-566 had torpedoed Zuiderkerk west-north-west of Lisbon, Portugal in position 40º20'N, 16º02'W. A torpedo had caused extensive flooding of the forward holds, which forced the 56 crew members and twelve passengers to abandon ship in the early morning. Leith picked up the survivors.