Arktika-class icebreaker

Arktika in November 1980
Class overview
Builders	Baltic Shipyard
Operators	FSUE Atomflot
Succeeded by	Project 22220 icebreaker
Built	1971–2007
In service	1975–present
Completed	6
Active	2
Retired	4
General characteristics [1][2]
Type	Icebreaker
Tonnage	20-24,000 GT
Displacement	23,000–25,168 tons
Length	148 m (486 ft)
Beam	30 m (98 ft)
Height	17.2 m (56 ft)
Draught	11 m (36 ft)
Installed power	Two OK-900A nuclear reactors (2 × 171 MW) Two steam turbogenerators (2 × 27.6 MW)
Propulsion	Nuclear-turbo-electric Three shafts (3 × 18 MW)
Speed	20.6 knots (38.2 km/h; 23.7 mph) (maximum)
Endurance	7.5 months
Crew	189
Aircraft carried	1 × Mi-2, Mi-8 or Ka-27 helicopter
Aviation facilities	Helipad and hangar for one helicopter

The Arktika class is a Russian (formerly Soviet) class of nuclear-powered icebreakers. Also known by their Russian designations Project 10520 (first two ships) and Project 10521 (from third ship onwards), they were the world's largest and most powerful icebreakers until the 2016 launch of the first Project 22220 icebreaker, also named Arktika.^[3][4]

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 state-owned corporation Atomflot. Of the ten civilian nuclear-powered vessels^{[not verified in body]} built by Russia or the Soviet Union, six were 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.