Arktika-class icebreaker
The "Arktika" class is a Russian (former Soviet) class of nuclear-powered icebreakers. Formerly known as "Project 10520 nuclear-powered icebreaker", they were the largest and most powerful icebreakers until the 2016 launch of the ship named Arktika. Ships of the "Arktika" class are owned by the federal government, but were operated by the Murmansk Shipping Company (MSCO) until 2008, when they were transferred to the fully government-owned operator Atomflot. Of the ten civilian nuclear-powered vessels built by Russia (and the Soviet Union), six have been of this type. They are used for escorting merchant ships in the Arctic Ocean north of Siberia as well as for scientific and recreational expeditions to the Arctic.
Voima (1952 icebreaker)
With an overall length of and a moulded beam of , "Voima" was once the longest and widest icebreaker ever built in Finland. At a draft of , her waterline measures in length and she can break a channel with a width of . Although her refit increased the draft of the ship to and displacement from 4,415 tons to 5,209 tons, she is now the smallest and lightest of the Finnish state-owned icebreakers. "Voima" was built to the highest ice class at the time, Lloyd's Register 1A, with a fully welded hull and shell plating measuring in thickness in the ice belt. Her ice strengthening was further increased in the refit. While "Voima" holds the highest Finnish-Swedish ice class, 1A Super, it has hardly any meaning for icebreakers which are of considerably stronger build than merchant ships operating in their care.