Feadship's Project 821, a remarkable hydrogen-powered superyacht, was recently unveiled in Amsterdam, the Netherlands, with rumors suggesting it was commissioned by Bill Gates. This first-of-its-kind vessel comes with a price tag exceeding USD 647 million, representing a groundbreaking moment in maritime history. The project is a result of a collaboration between Feadship and UK-based design firm RWD, now being represented by yacht brokerage Edmiston. It showcases Feadship's commitment to environmental sustainability, aiming to develop 'net zero' yachts by 2030. The superyacht's design focuses on a zero-diesel approach, utilizing liquid green hydrogen for both propulsion and onboard amenities. Challenges in storing hydrogen were tackled by innovative technology investing in cryogenic storage tanks. Although limited in hydrogen storage capacity, the vessel can operate emission-free for about a week. The technology developed for Project 821 will also be used to build hydrogen-powered ferries. Beyond its eco-conscious systems, the superyacht boasts luxurious amenities, sophisticated design, and accommodation for up to 30 guests and 44 crew members.