http://www.maritimejournal.com/archive101/2009/april/online_news/iron_lady_gets_another_five_year_makeover

The world’s biggest coal fired, steam icebreaker still afloat, the Stettin.

The 51.75m long and 13.43m wide Stettin draws 5.4m aft and displaces 1,138 tons. The 836 gross tons vessel was completed at the Oderwerke in Szczecin, Poland in 1933.