Icebreakers
A ship with a strengthened hull and high power, built to break a channel through sea ice. Voydar tracks 140 ships of this type by IMO number, 20 of them heard on AIS in the last 7 days.
Ship types explainedLargest icebreakers by gross tonnage
Gross tonnage measures a ship's enclosed volume, not its weight. From the ship's registered particulars (Wikidata, EU MRV and other public sources).
| Ship | GT | Built | Flag | Last AIS |
|---|---|---|---|---|
| Timofey Guzhenko | 49,597 | 2009 | — | not on AIS |
| Sevmorput | 38,226 | 1988 | — | not on AIS |
| Arktika | 28,476 | 2020 | Russia | Jul 16, 2026, 07:09 UTC |
| Sibir | 28,476 | 2022 | — | not on AIS |
| 50 Let Pobedy | 23,439 | 2007 | Russia | Jun 15, 2026, 02:01 UTC |
| Taymyr | 20,791 | 1989 | Russia | not on AIS |
| Vaygach | 20,791 | 1990 | Russia | not on AIS |
| Rossiya | 20,680 | 1985 | — | not on AIS |
| Sibir | 20,665 | 1977 | — | not on AIS |
| Sovetskiy Soyuz | 20,646 | 1989 | Russia | not on AIS |
RussiaNewest icebreakers
By year built, from the ship's registered particulars.
| Ship | GT | Built | Flag | Last AIS |
|---|---|---|---|---|
| Chilean icebreaker Almirante Viel | 10,044 | 2024 | — | not on AIS |
| Sibir | 28,476 | 2022 | — | not on AIS |
| SEVERNIY POLUS | — | 2022 | Russia | Oct 1, 2026, 21:24 UTC |
| Arktika | 28,476 | 2020 | Russia | Jul 16, 2026, 07:09 UTC |
| VICTOR CHERNOMYRDIN | 20,431 | 2019 | Russia | Oct 1, 2026, 16:23 UTC |
| SIR D. ATTENBOROUGH | 15,000 | 2019 | Falkland Islands | Oct 1, 2026, 22:00 UTC |
| Xue Long 2 | 12,366 | 2019 | China | not on AIS |
| Ilya Muromets | 4,530 | 2017 | — | not on AIS |
| L'Astrolabe | 2,028 | 2017 | — | not on AIS |
| Novorossiysk | 11,720 | 2016 | — | not on AIS |
Falkland Islands
ChinaFlags
The flags icebreakers in Voydar's records sail under most often.
Canada 
Finland 
United States 
Sweden 
Germany 
Argentina Recently seen on AIS
No vessels to show yet — data fills in as AIS arrives.