Voydar has no displayable AIS position for Sisu in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.

What kind of ship is Sisu?

Sisu is an icebreaker, built in 1939 by Wärtsilä.

What sanctions and inspection records does Voydar hold for Sisu?

Voydar has no matched sanctions record displayed for Sisu 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 Sisu. Missing records do not establish whether the ship has been detained.

Sisu

Icebreaker · built 1939

IMO5330371No AIS position on record

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In short

Sisu (Icebreaker) has no AIS position on record with Voydar.

Vessel type: Icebreaker
Flag: —
Year built: 1939
Gross tonnage: —
Size (length × beam): —
Registered owner: —

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Photo of Sisu — Photo: Unknown authorUnknown author; from the archives of the Finnish Maritime Museum · Licence: Public domain · via Wikimedia Commons

Last reported position

No AIS position on record for this vessel. Identity and particulars are below.

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Identity & particulars

Name: Sisu
IMO numberWhat is an IMO number?: 5330371
MMSIWhat is an MMSI?: —
Call signWhat is a call sign?: —
Flag: —
Vessel type: Icebreaker
Gross tonnageGross tonnage vs deadweight: —
Length overall: —
Beam: —
Year built: 1939

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.

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

About Sisu

Sisu was a Finnish state-owned icebreaker. Built in 1939 at Wärtsilä Hietalahti Shipyard in Helsinki, she was one of the world's first diesel-electric icebreakers. In addition to icebreaking duties, she served as a submarine tender for the Finnish Navy during the summer months until the end of the Continuation War. In 1975, Sisu was handed over to the Finnish Navy and renamed Louhi. She was decommissioned in 1986 and sold for scrap.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is Sisu now?: Voydar has no displayable AIS position for Sisu in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.
What kind of ship is Sisu?: Sisu is an icebreaker, built in 1939 by Wärtsilä.
What sanctions and inspection records does Voydar hold for Sisu?: Voydar has no matched sanctions record displayed for Sisu 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 Sisu. Missing records do not establish whether the ship has been detained.

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