Missä HMS Black Swan valmistui?
HMS Black Swan (L57)
Citation error, replace with{{cite book| author = Hague, Arnold| title = Sloops 1926-1946| location = Kendal, Englanti| publisher = World Ship Society| year = 1993| id = ISBN 0-905617-67-3| language = Transclusion error: {{En}} is only for use in File namespace. Use {{lang-en}} or {{en icon}} instead.}}
Citation error, replace with{{cite book| author = Gardiner, Robert (toim.)| title = Conway's All the World's Fighting Ships 1922–1946| location = Lontoo, Englanti| publisher = Conway Maritime Press| year = 1987| id = ISBN 0-85177-146-7| language = Transclusion error: {{En}} is only for use in File namespace. Use {{lang-en}} or {{en icon}} instead.}}