Ghost Ships That Baffled Einstein 100 Years Ago Are Making a Comeback

Fast Summary

• In 1925, the first rotor ship, invented by Anton Flettner using the Magnus effect, completed its North Sea voyage from Poland to scotland.
• Rotor ships utilize spinning cylinders instead of traditional sails, which increases stability adn fuel efficiency.
• The technology initially gained traction in the 1920s for cutting fuel use but largely collapsed during the Great Depression due to falling fuel prices and economic challenges.
• Modern shipping faces pressures from climate change and volatile oil prices; rotor sails are now resurging as a greener option.
• Finland-based Norsepower has equipped 22 ships with rotor sails as of June 2025, resulting in fuel savings of up to 25% or more.

Indian Opinion Analysis

The resurgence of rotor sail technology offers an important opportunity for India’s maritime sector. As one of the world’s largest importers and exporters through sea trade, India’s reliance on fossil fuels for shipping contributes considerably to global emissions. With international agencies setting net-zero targets by 2030 and stricter regulations tightening around emissions at ports worldwide, India may benefit from exploring innovative technologies like Flettner rotors. This aligns with its broader sustainability goals while perhaps reducing operational costs amid fluctuating oil prices. However,widespread adoption will depend on factors such as upfront investment feasibility within India’s diverse fleet types and infrastructure preparedness for green upgrades.

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