Atle-class icebreaker

The Atle class comprises five icebreakers built for the Swedish and Finnish Transport Agency. The two Finnish ships, Urho and Sisu, are sometimes considered a separate class, but all are operationally identical.

Icebreaker Atle
Class overview
BuildersWärtsilä Helsinki Shipyard, Finland
Operators
In commission1974
Completed5
Active5
General characteristics
TypeIcebreaker
Displacement9,500 t (9,350 long tons)
Length104.6 m (343 ft 2 in) o/a
Beam23.8 m (78 ft 1 in)
Draft7.3–8.3 m (24–27 ft)
Installed power16.2 MW (21,700 hp)
PropulsionDiesel-electric
Speed
  • 19 knots (35 km/h; 22 mph) (maximum)
  • 14 knots (26 km/h; 16 mph) (service)
Bollard pull: 190 tonnes
Bunker capacity: 2,200 m³
Endurance: 6–8 weeks

The ships were built by Wärtsilä Helsinki Shipyard in Finland and entered service in the mid to late 1970s. The maneuvering system, incorporating dual rudders and dual bow propellers, represented significant technical innovation. They are also notable for their high level of crew comfort (for their time), to a point where Urho has served the Finnish government as a VIP transport.

Ships

  • Atle, Sweden, commissioned 1974
  • Urho, Finland, commissioned 1975
  • Frej, Sweden, commissioned 1975
  • Sisu, Finland, commissioned 1976
  • Ymer, Sweden, commissioned 1977
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