Sisu (1976 icebreaker)
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Sisu is a Finnish icebreaker of the Atle class built in 1976 in Helsinki.
Sisu (left) with her sister Urho
Voima (1952 icebreaker)
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Voima is a Finnish state-owned icebreaker. Built by Wärtsilä Hietalahti shipyard in Helsinki in 1954, she was the first icebreaker in the world to be equipped with two bow propellers and generated wid
Voima leaving Helsinki after bunkering on 5 April 2011
Voima was the first icebreaker in the world with two bow propellers
Voima shortly before delivery at Wärtsilä Hietalahti shipyard
Voima breaking ice outside Helsinki, showing her original outfit