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.
Jääkarhu
Being one of the last large steam-powered icebreakers in active service, "Sibiryakov" was used in a 1960s Soviet documentary film to represent the steam-powered icebreaker, "Yermak", which had been broken up in 1964. She was also used in the 1969 Soviet/Italian film "The Red Tent" to represent another Soviet icebreaker, "Krasin", which had participated in the rescue mission of Umberto Nobile and other survivors of the crash of airship "Italia" in 1928. While the original 1917-built icebreaker was still in service at that time, her extensive rebuilding in 1953–1960 had changed the look of the vessel completely and thus a more traditional-looking icebreaker was needed for the role.