Garinko 2: The Icebreaker That Sails Through Frozen Seas

Where the Sea Turns to Ice

A Floating Adventure in the Sea of Okhotsk

Along the northeastern coast of Hokkaido, the icy waters of the Sea of Okhotsk create one of Japan’s most dramatic winter landscapes — vast fields of drifting pack ice. To explore this frozen wilderness, ordinary ships are not enough.

The answer is Garinko 2, a screw-driven icebreaker operating from the port of Monbetsu. Designed specifically for drift ice tourism, the vessel transforms extreme maritime conditions into a safe and unforgettable cruise experience.

Icebreakers sailing through drift ice in Sea of Okhotsk

Screw-driven icebreaker Garinko 2

From Oil Exploration to Tourist Icon

The story began in 1985 when the original Garinko was built by Mitsui Engineering & Shipbuilding for Arctic oil exploration near Alaska. After experimental operations ended, the vessel was converted into a tourist icebreaker in 1987.

Its small capacity — initially just 32 passengers — made early voyages intimate but limited. Still, between 1988 and 1996 more than 80,000 visitors experienced the thrill of navigating through drifting ice. Eventually, after ten winter seasons, the first-generation Garinko was replaced and later displayed at the Monbetsu marine park, where its unusual propulsion system remains an attraction.

Original Garinko 2 screw icebreaker propulsion system

The Engineering Behind the Screw Icebreaker

Unlike conventional icebreakers that rely on hull weight to crush ice, Garinko 2 uses screw-rotor propulsion. Two massive Archimedean screws mounted at the bow rotate along the direction of travel. Instead of breaking ice by impact, they grip and push through slushy or compact ice up to 70 cm thick.

This mechanism works similarly to a rotating corkscrew moving through dense material. The advantage is enhanced maneuverability and continuous forward motion even in fragmented drift ice fields. In addition to the two screw rotors, the vessel is equipped with a conventional propeller, providing balanced navigation during open-water sailing.

Built in 1997 by Yamanishi Co., Ltd. in Ishinomaki, Garinko 2 was purpose-designed for tourism rather than industrial exploration.

Modern Comfort in an Extreme Environment

With a displacement of 150 tons and capacity for 195 passengers, Garinko 2 is significantly larger than its predecessor. Powered by three Mercedes-Benz diesel generator sets with total output of 735 kW, the vessel reaches speeds up to 11 knots.

Cruises typically extend up to 10 kilometers offshore. Passengers travel from Sapporo by bus to Monbetsu, where the journey begins. While winter tours focus on drift ice, summer cruises reveal a completely different seascape, proving that the vessel operates year-round.

Technical Specifications

Frequently Asked Questions (FAQ)

What makes Garinko 2 unique?

Its screw-rotor propulsion system allows it to move through drift ice rather than simply crush it.

How thick ice can it handle?

Up to 70 cm.

Where do cruises start?

From Monbetsu Port in Hokkaido.

Is it operational year-round?

Yes, winter drift ice tours and summer sightseeing cruises.

Was Garinko 2 built as a tourist vessel?

Yes, unlike its predecessor, it was designed specifically for tourism.

Conclusion

Garinko 2 is more than a sightseeing vessel — it is a practical demonstration of alternative icebreaking technology. By combining Archimedean screw propulsion with modern passenger comfort, it turns one of nature’s harshest marine environments into an accessible and educational adventure.

For maritime enthusiasts, it represents a rare example of engineering adapted not only for survival in ice, but for bringing people safely into its frozen world.