Russian ss Sabotnik from Stettin was held up near Nargen Island according to the Weekly Intelligence Summary (W.I.S.) No. 10 dated 12 March 1921

An item reported that the [Russian] ss Sabotnik from Stettin was held up near Nargen Island off Reval [Tallinn, Estnia] due to a damaged screw.

Source

The National Archives, Kew Gardens, England CAB-24-121-21