Another key design feature of Y721 - already described as ‘one of the most beautiful sailing yachts in existence’ - is three separate decks. With a $500 (£423) million price tag the Super-Yacht has been under construction and subject to secrecy in the westof Holland for over a year. Once it is completed in 2022, it will overtake Sea Cloud, the largest ocean-going liner today, to become the world’s largest sailing yacht. Jeff Bezos, Amazon’s founder’s commissioned the vessel based on the Oceanco’s Black Pearl vessel, one of the largest and most ecological yachts in the world. Once the black-carried yacht is constructed, it will be deployed to Alblasserdam by custom yacht-builders Oceanco, where it is given the final accessories. The Black Pearl is the world’s largest DynaRig sailing yacht with three 70 meter high carbon masts, built by Oceanco in 2018.