Otso (Icebreaker, Finland flag) was last seen on AIS on Oct 1, 2026, 19:40 UTC, not moving, in the Baltic Sea. The crew-entered destination was HELSINKI (voyage report via Digitraffic marine AIS, received Oct 1, 2026, 19:28 UTC). This report does not confirm the ship’s current route.

What kind of ship is Otso?

Otso is an icebreaker sailing under the flag of Finland, built in 1986 by Wärtsilä. The vessel is 98.6 m long with a beam of 24.2 m and has a gross tonnage of 7,066.

What sanctions and inspection records does Seadar hold for Otso?

Seadar has no matched sanctions record displayed for Otso from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels and the New Zealand Russia Sanctions Register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Otso. Missing records do not establish whether the ship has been detained.

Otso

Icebreaker · Finland · built 1986 · AIS Class A

IMO8405880MMSI230252000Call signOIRTLast AIS position Oct 1, 2026, 19:40 UTC

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In short

Otso (Icebreaker, Finland flag) was last seen on AIS on Oct 1, 2026, 19:40 UTC, not moving, in the Baltic Sea. Its crew-entered AIS destination is HELSINKI; its reported draught is 7.8 m (voyage report via Digitraffic marine AIS, received Oct 1, 2026, 19:28 UTC).

Vessel type: Icebreaker
Flag: Finland
Year built: 1986
Gross tonnage: 7,066
Size (length × beam): 99 m × 24 m
Registered owner: —

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Last reported position

received Oct 1, 2026, 19:40 UTC

Position: 60.1701° N, 24.9744° E
Area: Baltic Sea
StatusWhat do AIS statuses mean?: Under way using engine
Speed: 0 kn
Course: 321°
Heading: 243°

60.1701° N, 24.9744° E

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Seadar detected no port call in the last 30 days.

Port calls are detected by Seadar from AIS (at least 30 minutes slow inside a harbour area); see Port calls below.

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Identity & particulars

Name: Otso
IMO numberWhat is an IMO number?: 8405880
MMSIWhat is an MMSI?: 230252000
Call signWhat is a call sign?: OIRT
Flag: Finland
Vessel type: Detailed type from WikidataIcebreaker
AIS ship type: Other
Gross tonnageGross tonnage vs deadweight: 7,066
Length overall: 98.6 m
Beam: 24.2 m
Year built: 1986

A tag next to a value names the register that supplied it (hover or tap it for the record and date). Values without a tag come from the ship's own AIS broadcasts or from Wikidata. Position and identity are derived live from AIS.

Ownership & management

Each line shows where the fact comes from. Links backed by an identifier point to the company page.

Builder: Wärtsilä
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026

About Otso

Otso is a Finnish state-owned icebreaker. Built by Wärtsilä Helsinki shipyard in 1986 to replace the aging Karhu-class icebreakers, she was the first Finnish post-war icebreaker to be built without bow propellers. Otso has an identical sister ship, Kontio, which was delivered in 1987.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is Otso now?: Otso (Icebreaker, Finland flag) was last seen on AIS on Oct 1, 2026, 19:40 UTC, not moving, in the Baltic Sea. The crew-entered destination was HELSINKI (voyage report via Digitraffic marine AIS, received Oct 1, 2026, 19:28 UTC). This report does not confirm the ship’s current route.
What kind of ship is Otso?: Otso is an icebreaker sailing under the flag of Finland, built in 1986 by Wärtsilä. The vessel is 98.6 m long with a beam of 24.2 m and has a gross tonnage of 7,066.
What sanctions and inspection records does Seadar hold for Otso?: Seadar has no matched sanctions record displayed for Otso from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels and the New Zealand Russia Sanctions Register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Otso. Missing records do not establish whether the ship has been detained.

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