Royal Huisman reveals Project 410, the world's largest single-masted sailing yacht

Royal Huisman has unveiled Project 410, an 85-meter (280-foot) sloop the Dutch shipyard says will become the world's largest single-masted sailing yacht once she takes to the water and will rank among the ten largest sailing yachts in the world. The vessel is currently completing final work at the builder's newbuild facility in Vollenhove, in the Netherlands, after years of tightly guarded construction.

How big is Project 410

The hull was turned in summer 2024, with the build progressing over the two years since, and the yacht is scheduled to be transported to the yard's deepwater site near Amsterdam for launch in November.

Once in the water, the carbon fiber mast and matching boom will be stepped, or raised into place, a milestone the shipyard is treating as separate from the launch itself. Delivery to the yacht's owner is planned for 2026, closing out a project that began well before the vessel's existence was ever confirmed publicly.

Who designed it and what it looks like

Exterior and naval architecture come from Frers Design, with interiors by Wetzels Brown. Mani Frers of Frers Design describes the deck lines as forming a single arrow shape from bow to stern, incorporating a glass pilothouse set low behind the mast, with the raked mast and an engineered boom reinforcing what he calls the yacht's dynamic profile.

The rig itself, including the carbon mast, boom and integrated sailing system, was built by Rondal, Royal Huisman's sister company and a specialist in carbon fiber and aluminum spars. The accommodation is spread across two decks, arranged to preserve the fluid hull shape needed for the yacht to sail rather than simply display its size.

Large hull windows, skylights and high ceilings run through the main deck, giving views out to the horizon and up toward the sails. A double-height main entrance opens onto a large salon, which leads aft to a veranda and a beach club, while the owner's suite is toward the bow, separated from the main gathering spaces.

Gillian Brown of Wetzels Brown said the interior is meant to create an environment where people can relax and feel close to the sea, describing the exterior, interior and the experience of sailing as developed together as one continuous expression rather than as separate design briefs handed between teams.

What Royal Huisman is known for

Royal Huisman has built some of the largest and most technically ambitious sailing superyachts on the water, and Project 410 is the yard's clearest attempt yet at scale without sacrificing what makes a boat sail well.

Royal Huisman chief executive Peter Nayeb said the ambition was never simply to build the world's largest sloop but to create a yacht that stays true to the pleasure and performance of sailing.

That tension between scale and sailing feel runs through the whole project. Royal Huisman says Project 410 can set sail within minutes, and the yacht carries substantial battery capacity that recharges while under sail, enabling a silent, emissions-free operating mode when the owner wants quiet running rather than engine power.

The single-mast, twin-mainsail configuration is what gives Project 410 its sloop classification, distinguishing it from the multi-masted schooners and ketches that dominate the upper end of the sailing superyacht market. A single mast at this size is a harder engineering problem than splitting the load across two or three, which is part of why the achievement is being framed as record-setting.

We track the world's largest superyachts as part of our coverage of the garage, where sailing vessels compete on a different set of terms than the motor megayachts that usually dominate headlines for size. Sailing yachts of Project 410's scale are rare because engineering a single mast to carry that much sail area, safely, is harder than adding volume to a motor hull.

We have also covered Feadship's Hive concept, a 377-foot megayacht design that is considerably larger than Project 410 but built around engines rather than sail.

Royal Huisman has not disclosed a price for Project 410, nor named the owner taking delivery next year. Both are typical omissions for a yard that built this project under unusually tight secrecy, sharing only fragments of design and construction detail before this reveal at the Monaco Yacht Show.

What happens next is concrete.