FEADSHIP'S PROJECT 821 UNVEILS A GREEN REVOLUTION IN SUPERYACHTING
Feadship's Project 821, now named Breakthrough, is the world's first hydrogen fuel-cell superyacht: a 118.8-metre vessel launched by the Dutch shipyard on 4 May 2024 and delivered in 2025. Designed by Redman Whiteley Dixon (RWD), it pairs extraordinary luxury with a groundbreaking propulsion system built around liquid hydrogen stored at cryogenic temperatures, eliminating diesel emissions for hotel load and coastal navigation entirely.
The hydrogen fuel-cell system
At the core of Project 821's green credentials is a bank of 16 PowerCell H2 fuel-cell generators, each producing 185 kW, working alongside two 900 kW MTU generators and three 2,500 kW MTU generators for offshore passages. The cryogenic hydrogen tank stores approximately four tonnes of liquid hydrogen at -253 degrees Celsius, giving the yacht a full week of silent operation at anchor or emission-free cruising at 10 knots near harbours and protected marine zones. For longer passages, the MTU generators provide a range of 6,500 nautical miles at 14 knots. According to Boat International's in-depth feature on Project 821, the hydrogen system addresses the 70 to 78 per cent of annual energy consumption that occurs during hotel load, not propulsion.
Design and interior
RWD's design for Project 821 breaks new ground structurally, featuring more hull openings than Feadship has ever incorporated into a single build. The result is a hull flooded with natural light through expanded windows and light-enhanced atria. The semi-submerged Neptune lounge sits at the waterline, offering an immersive marine environment. Inside, 13 staterooms accommodate 26 guests, supported by 44 crew. Amenities include a cinema, a library, a hospital facility, and an 8.2-metre swimming pool. The structure extends and expands the boundaries of what is physically possible in a superyacht hull, as Edmiston's launch report on Project 821 confirms, calling it a milestone for the entire superyacht industry.
A stepping stone to net-zero superyachting
Feadship's stated goal is a net-zero superyacht by 2030. Project 821 is the most significant step yet on that path, proving that liquid hydrogen is a viable fuel at the scale of a 118-metre vessel. The shipyard is already exploring methanol as a complementary alternative for future designs. CEO Jamie Edmiston has called Breakthrough "the best yacht ever built," a judgement grounded not just in its appointments but in its environmental architecture. Project 821 signals that ultra-luxury and radical sustainability are no longer competing values in superyacht design.
Photo: Feadship
For those drawn to the most exclusive end of maritime design, explore the TheArsenale boat collection, including the SAY29 Runabout Yacht and the Super Yacht Sub 3, a personal submarine built to deploy from superyachts precisely like Project 821.
