Project 21900 icebreaker
List of project 21900/21900M icebreakers

Name
Project
Builder
IMO number
Commissioned
Home port
Status
Moskva (ru)
21900
Baltic Shipyard, Saint Petersburg, Russia
9326574
2008
Saint Petersburg
In service
Sankt-Peterburg (ru)
21900
Baltic Shipyard, Saint Petersburg, Russia
9326586
2009
Saint Petersburg
In service
Vladivostok (ru)
21900M
Vyborg Shipyard, Vyborg, Russia
9658654
2015
Saint Petersburg
In service
Murmansk
21900M
Arctech Helsinki Shipyard, Helsinki, Finland
9658666
2015
Murmansk
In service
Novorossiysk
21900M
Vyborg Shipyard, Vyborg, Russia
9692571
2016
Murmansk
In service

Question: When did Vladivostok, Murmansk, and Novorossiysk enter service?
Answer: Vladivostok and Murmansk entered service in 2015, and the last one (Novorossiysk) in 2016.