TK 20 "Severstal" : Typhoon Class SSBN (Severodvinsk)

 abandoned / shut down, draw only border, nuclear submarine

TK-20 "Северсталь: Severstal" [1989]
Project # : 941 Akula
NATO Class : Typhoon Class Nuclear Ballistic Missile Submarine SSBN
Naming history : from 20.06.2000 - TK-20 Severstal`
Laid down : 27.08.1985, Launched : 11.04.1989, Commissioned 19.12.1989.

The Project 941 or Akula, Russian "Акула" ("Shark") class submarine (NATO reporting name: Typhoon) is a type of nuclear-powered ballistic missile submarine deployed by the Soviet Navy in the 1980s. With a maximum displacement of 33,800 tons, the Typhoons are the largest class of submarine ever built, large enough to accommodate decent living facilities for the crew when submerged for months on end.The source of the NATO reporting name remains unclear, although it is often claimed to be related to the use of the word "Typhoon" ("Тайфун") by Leonid Brezhnev in a 1974 speech while describing a new type of nuclear ballistic missile submarine.

Soviet doctrine for these vessels was to have them launch SLBMs while submerged under the arctic ice, avoiding the traversal of the GIUK gap to remain safe from the enemy attack submarines and anti-submarine forces. Technically Typhoons were also able to successfully deploy their long-range nuclear missiles while moored at their docks.

In reserve from 2005. The Severstal, named after the large iron & steel company town located in the Kola Peninsula just south of Murmansk. Due to be upgraded here at Sevmash Yard, Severodvinsk, to Project 941 UM for rearming with the Bulava SLBM missile system.

htka.hu/2010/05/09/2019-ig-maradnak-a-typhoon-ok/
en.valka.cz/viewtopic.php/title/SSBN-TK-20-Severstal/t/...
ru.wikipedia.org/wiki/%D0%A2%D0%9A-20