Feadship has unveiled Project 821, heralded as the world's first hydrogen fuel cell superyacht, showcasing cutting-edge green technology in the marine industry. The ambitious five-year development aimed to create the most environmentally advanced yacht without compromises. Notable features include cryogenic hydrogen storage tanks, sixteen fuel cell units, and the ability to reform methanol into hydrogen for extended cruises. To enhance efficiency, waste heat recovery systems are employed to heat onboard facilities. Despite the challenges of storing hydrogen, the yacht's innovative design includes 92 cubic meters of hydrogen storage and 543 kW of battery packs. Project 821, now the largest Dutch-built motor yacht, offers luxurious amenities such as retractable balconies and smart energy management systems. Feadship's CEO highlights the significance of decarbonization efforts and the priority placed on sustainable practices. The superyacht is currently available for sale, reflecting a milestone in green marine technology with a focus on environmental sustainability.