Project 21900 icebreaker

Sankt-Peterburg, the second Project 21900 icebreaker, underway in Kara Sea in 2015
Class overview
Builders
OperatorsRosmorport
Built
  • 2008–2009 (21900)
  • 2015–2016 (21900M)
  • 2023–2025 (21900M2; planned)
Planned7
Building1
Completed5
General characteristics (21900, 21900M)
TypeIcebreaker
Displacement14,300 t (14,100 long tons)
Length114–119.8 m (374–393 ft) (overall)
Beam27.5 m (90 ft)
Draft8.5 m (28 ft) (design)
Ice classRMRS Icebreaker6
Installed powerFour diesel generating sets
PropulsionDiesel-electric; two Steerprop azimuth thrusters (2 × 8.2–9 MW)
Speed
  • 16–17 knots (30–31 km/h; 18–20 mph)
  • 3–3.5 knots (5.6–6.5 km/h; 3.5–4.0 mph) in 1.0 m (3.3 ft) ice
Crew25
Aviation facilitiesHelideck for Ka-32/Ka-226 (21900) or Mi-8 (21900M)

Project 21900 icebreakers and their derivative designs are a series of Russian diesel-electric icebreakers built in the 2000s. They are also sometimes referred to using the type size series designation LK-16.[note 1]

The two Project 21900 icebreakers built by Baltic Shipyard, Moskva and Sankt-Peterburg, were the first non-nuclear icebreakers built by a Russian shipyard in over three decades and the first new icebreakers ordered following the dissolution of the Soviet Union. Few years later, three additional icebreakers of a slightly improved design referred to as Project 21900M were ordered from Vyborg Shipyard: two vessels (Vladivostok and Novorossiysk) were built in Russia and the third (Murmansk) was subcontracted to the Finnish shipbuilder Arctech Helsinki Shipyard. One icebreaker of revised Project 21900M2 design was ordered from Pella Sietas in 2019 and another from Vyborg Shipyard in 2021.
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