Otso (icebreaker)

Otso returning from sea trials to the icebreaker base at Katajanokka, Helsinki, on 18 January 2012.
History
Finland
NameOtso
NamesakeFinnish term for bear
Owner
  • Finnish Maritime Administration (1986–2004)
  • Finstaship (2004–2010)
  • Arctia Icebreaking (2010–)
Port of registryHelsinki,  Finland
Ordered19 March 1984
BuilderWärtsilä Helsinki Shipyard, Finland
CostFIM 235 million
Yard number472
Launched12 July 1985
Completed30 January 1986
In service1986–present
Identification
StatusIn service
General characteristics
TypeIcebreaker
Tonnage
  • 7,189 GT
  • 2,157 NT
Displacement9,222 tonnes
Length99 m (324 ft 10 in)
Beam24.2 m (79 ft 5 in)
Draft8 m (26 ft 3 in) (maximum)
Ice classPolar Class 4 (2015–)
Installed power4 × Wärtsilä Vasa 16V32 (4 × 5,460 kW)
Propulsion
Speed
  • 18.5 knots (34.3 km/h; 21.3 mph)
  • 10 knots (19 km/h; 12 mph) in 0.8 m (31 in) level ice
Crew20
Aviation facilitiesHelicopter landing area

Otso is a Finnish state-owned icebreaker. Built by Wärtsilä Helsinki shipyard in 1986 to replace the aging Karhu-class icebreakers, she was the first Finnish post-war icebreaker to be built without bow propellers. Otso has an identical sister ship, Kontio, which was delivered in 1987.

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