Editing November-class submarine (section)

====K-21====
K-21 was laid down on 2 April 1960 and launched on 18 June 1961. K-21 entered service with the [[Soviet Northern Fleet|Northern Fleet]] (given to 3rd division of nuclear submarines which was a part of 1st submarine flotilla, based in Malaya Lopatka of [[Zapadnaya Litsa (naval base)|Zapadnaya Litsa]] Fjord) on 28 November 1961. The submarine performed an Arctic cruise that year (passed 2,382 miles up-top and 3,524 miles submerged) and launched four torpedoes to determine a size of an ice-hole after explosion and a possibility to surface there.

K-21 performed long-range cruise between 24 March and 14 May 1962 (51 days, passed 10,124 miles including 8,648 miles submerged), patrol mission to the [[Norwegian Sea]] and [[Atlantic Ocean|North Atlantic]] according to plan "Ograda" ("Protective fence") between 23 April and 21 May 1964, patrol mission in [[Barents Sea]] in 1965, 3 patrol missions in 1967–1970 (170 days total). Three interim overhauls were made in 1965–1966, 1973–1975 (including refueling in 1975) and 1983–1985.  In 1975, K-21 was given to 17th submarine division which was a part of 11th submarine flotilla based in [[Ostrovnoy, Murmansk Oblast|Gremikha]]. The submarine performed 4 patrol missions in 1976–1980 (200 days total) and combat training cruises in 1986–1989.

K-21 was decommissioned from the order of battle in 1991.<ref name="PLR1"/> She lied up in [[Gremikha Bay]] as of May 2000 waiting utilization. K-21 passed 190,831 miles (22,932 operational hours) since placed in service.<ref>{{cite web|url=http://www.deepstorm.ru/DeepStorm.files/45-92/nts/627a/k21/k21.htm|title=-21, -21 627|access-date=19 December 2014}}</ref>