Operation Seekuh

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'Seekuh' was a German naval minelaying operation in the Kara Sea by Kapitšnleutnant Hans Hildebrandt’s U-636 (17/30 August 1943).

The boat deposited 24 TMB mines in the estuary of the Yenisei river on 23 August, but there are no indications that any of the mines achieved a sinking.