International experts gathered at Windship Day 2026 at the German Port Museum, Hamburg; RASANT proves sail cargo ships viable for zero-emission

Windship Day 2026 sets course for modern wind-powered shipping

Against the unique backdrop of the historic museum ship PEKING at the German Port Museum in Hamburg, international experts gathered for Windship Day 2026, a high-level conference, dedicated to the future of wind-powered commercial shipping. Held as a side event to the world’s leading maritime trade fair SMM, the conference hosted by Fraunhofer Workgroup Sustainable Maritime Mobility brought together stakeholders from shipping, shipbuilding, technology, research, finance, logistics, and policy to discuss how wind propulsion can contribute to the decarbonisation of global maritime transport.

This year’s event focused on the results of the RASANT project, a German research initiative developing innovative cargo vessel concepts in which wind energy serves as the primary propulsion source. The project aims to demonstrate commercially viable sail cargo ships capable of achieving fully zero-emission operation through the combination of advanced wind propulsion systems, renewable fuels, battery storage, and hybrid power architectures.

“Shipping is facing one of the most significant transformations in its history,” said Prof. Capt. Michael Vahs, project coordinator at Emden

Leer University of Applied Sciences. “The technologies required for wind-powered commercial shipping are no longer visions for the future. Through RASANT, we are demonstrating that sail-assisted and wind-powered cargo vessels can become a technically feasible and economically competitive component of a climate-neutral maritime transport system.”

From concept studies to market opportunities The conference programme of the Windship Day 2026 showcased a broad range of research results and industry perspectives. Technical sessions presented developments in hybrid sail cargo ship design, route optimisation, hydrodynamic and aerodynamic modelling, gate rudder technology, wind-powered tanker concepts for green ammonia transport, and methods for evaluating wind propulsion performance.

A central focus was the integration of wind propulsion into commercially viable vessel concepts capable of meeting future regulatory requirements while remaining competitive in international shipping markets. Researchers presented simulation tools and design methodologies that allow ship operators and designers to assess performance, emissions reductions, and operational efficiency under real-world conditions. The afternoon sessions broadened the perspective beyond technology to examine market conditions and operational experience.

A growing momentum for wind propulsion Wind-assisted and wind-powered ship propulsion has gained considerable momentum in recent years. As advanced sail technologies, automated control systems, energy storage solutions, and alternative fuels mature, wind propulsion is increasingly recognised as one of the most promising pathways towards meeting international climate targets while maintaining commercial competitiveness.

Dr. Florian Kluwe, Managing Director of SDC Ship Design & Consult, highlighted the growing commercial relevance of wind-powered shipping: “Wind propulsion is no longer a vision of idealists. We clearly see that the interest is growing in commercial shipping, and we firmly believe that wind propulsion will play a major role in the decarbonisation of the shipping industry. It is simply too attractive not to do it.”

The conference concluded with a panel discussion on opportunities and challenges for market players. The lively exchange demonstrated the growing international interest in modern sail cargo ships and confirmed that wind propulsion is rapidly moving from niche applications toward mainstream commercial shipping.

About the RASANT project: Developing the next generation of zero-emission cargo ships RASANT (“Hybrid Sail Cargo Ships”) is a collaborative industrial research project funded by the German Federal Ministry of Transport under the National Innovation Programme for Hydrogen and Fuel Cell Technology (NIP II). The project investigates vessel concepts in which wind energy provides, on average, more than 50 percent of the required propulsive power, significantly reducing energy demand and the need for fossil fuels.

The consortium is led by Emden

Leer University of Applied Sciences and includes Fraunhofer Institute for Wind Energy Systems IWES, Flensburg University of Applied Sciences, and MARIKO GmbH, supported by thirteen associated partners from across the German maritime sector. Together, they address ship design, route simulation, propulsion technologies, energy systems, market analysis, and commercial implementation.

For more information about the RASANT project, visit www.rasant.eu .

Last modified: September 01, 2026