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HYSEAS III | Case Study | Longitude

Project title: HYSEAS III | Case Study | Longitude
Project location: Scotland
Client: CMAL
Project Summary:

Longitude supported Caledonian Maritime Assets Ltd (CMAL) with the concept design for Europe’s 1st sea-going hydrogen-powered ferry.

HYSEAS III Project

 

HYSEAS III is a pioneering European initiative aimed at delivering the continent’s first sea-going ferry powered entirely by hydrogen fuel cells, marking a major milestone in the decarbonisation of the maritime sector.

Led from Scotland, the project brought together industry, academia, and public sector partners to demonstrate the feasibility of clean, zero-emission ferry transport powered by renewable energy.

 

 

Scope of work

  • Developed vessel design renderings for Europe’s first sea-going hydrogen-powered ferry.
  • Integrated hydrogen fuel cell technology into a practical ferry design.
  • Designed for double-ended operation, with capacity for 120 passengers and 16 cars or 2 trucks.
  • Adapted design for real-world use on the Kirkwall–Shapinsay route, with potential for wider application.

 

Results

  • First complete concept visuals delivered, supporting stakeholder engagement and regulatory pathways.
  • Created a scalable blueprint for future zero-emission ferry designs.
  • Demonstrated the viability of hydrogen as a clean marine propulsion system.

 

The value we delivered

Led the marine design integration of cutting-edge hydrogen systems into a sea-going vessel.

Showcased design feasibility for operators, funders, and policymakers.

Utilising our in-house expertise, Longitude helped position the UK and Scotland at the forefront of hydrogen marine transport innovation.

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