Project 22220 icebreaker
The first ship, ("Арктика" – Arctic), was laid down in November 2013 and is expected to enter service in 2019. Launched on 16 June 2016, the ship will be the world's largest and the most powerful icebreaker surpassing the "50 Let Pobedy".
The second ship of this class, "Sibir" – ("Сибирь" – Siberia), was laid down on 26 May 2015 at Baltic Shipyard. On 1 July 2016, the hull of "Sibir", one third of the ship and weighing 3,500 t, was shifted to the place of the launched "Arktika" icebreaker, where construction will be completed. The shift made place for the start of the construction of the hull of the icebreaker "Ural" – ("Урал" – Ural). Construction of the Ural started on 25 July 2016.
Otso (icebreaker)
During extensive ice trials in the Bothnian Bay in March 1986, "Otso" was put through a series of test to determine her icebreaking capability. In a race against the 1975-built "Urho" in level ice, "Otso" beat the older but more powerful four-propelled icebreaker by more than a ship's length, showing that in terms of ice resistance the new icebreaker was superior to her predecessor. In ice, she could easily maintain a speed of and small ice ridges along the way appeared to be of no consequence to the vessel. However, the strength of the new icebreaker was put to the ultimate test when she encountered a large pressure ridge reaching all the way to the seafloor some below the surface. After preparations, "Otso" was accelerated to a speed of and rammed into the ridge at full power. Since the new icebreaker had a smooth inclined stem and lacked the bow propellers of her predecessors, she rode up the ridge and began listing to the port side as the hull rose from the water. After coming to a stop, "Otso" slid back by herself without utilizing the engines, and the ridge was penetrated on the second charge. The robustness of the ship and its propulsion system were further proven when the icebreaker was backed into a ridge at "to prove to the customer it doesn't break".