Icebreaker
In May 2007, sea trials were completed for the nuclear-powered Russian icebreaker NS . The vessel was put into service by Murmansk Shipping Company, which manages all eight Russian state-owned nuclear icebreakers. The keel was originally laid in 1989 by Baltic Works of Leningrad, and the ship was launched in 1993 as NS "Ural". This icebreaker was intended to be the sixth and last of the "Arktika" class, and currently is the world's largest icebreaker.
Sisu (1938 icebreaker)
The Finnish Board of Navigation decommissioned "Sisu", now the oldest and smallest icebreaker in the state-owned fleet, in 1974. At the time, Finland had a fleet of nine diesel-electric icebreakers in service and two more under construction. The new icebreakers, which had nearly five times the displacement and more than five times the power of the old "Sisu", were designed to guarantee year-round traffic to all Finnish ports in the Bothnian Bay. The second of these icebreakers was named "Sisu" in 1975.