Lürssen Delivers Nausicaä

Four years. 114.2 metres. Every surface curved by design, not convention. What Nausicaä’s delivery tells us about where the industry is heading.

There is a detail about Nausicaä that says more than any specification sheet: Lürssen states that the yacht has not changed one iota from the digital representation drawn six years ago.

That is not a common thing. In most large custom builds, the design is handed to naval architects, structural engineers, and classification bodies, and what emerges at delivery is a practical relative of the original concept. The original idea is negotiated into existence. With Nausicaä, it was engineered into existence, unchanged.

That distinction matters. It is the difference between a yacht that was built to a brief and a yacht that was built to a vision.

What Was Built

The 114.2-metre Lürssen superyacht Nausicaä has been delivered to her owner. Known throughout construction as Project Cosmos, the vessel was commissioned for a Japanese owner and features an explorer-style profile conceived by Australian industrial designer Marc Newson, who is responsible for both the exterior and the interior.

Every aspect of Nausicaä is custom Marc Newson. She features pioneering glass engineering, diesel-electric propulsion, and an Ice Class hull designed for global exploration.

Construction began in January 2022. The yacht hit the water in August 2025 and completed sea trials in November, with delivery following shortly after. Her name, drawn from the Homeric princess associated with navigation and exploration, was revealed during those trials in Kiel.

The Design Brief

Newson’s brief was unusually open for a platform of this scale: rounded forms, curved glazing, louvred detailing, almost no flat planes anywhere, which tracks for a designer best known for work with Apple, Qantas, and Louis Vuitton.

What makes Nausicaä most recognisable is a profile shaped by curves, rounded edges, and louvred details, free from flat surfaces and harsh angular lines. As Lürssen put it: “Executing this vision was an exercise in creative engineering, moulding natural and organic shapes out of unforgiving materials.”

The result is a yacht that looks structurally impossible from certain angles, and is structurally demanding from every angle. Developing vast cylindrical steel forms that are geometrically precise, identical in size, and mirrored in design was no straightforward undertaking. This detail appears throughout: along the exterior aft deck, framing the main aft entrance, across exterior doors, and extending to the exhaust mast.

Photo: Tom van Oossanen

The Glass Question

The most discussed element of Nausicaä’s architecture is her glazing, and for good reason. A continuous glass band wraps the entire upper deck. While much of it is glazing, intersections of bulwarks, doors, and technical spaces are finished in the same material language, creating the impression of an uninterrupted ribbon of glass.

At the top of the profile sits the Skydome. This glass structure is formed from seven vast curved panes, each measuring 3m x 2.8m and 62mm thick, with each pane weighing 1,050kg. It forms part of the owner’s study and is fitted with bespoke internal bronze shutters.

The Skydome measures 56 square metres and connects directly to a private terrace.

What She Carries

The open aft deck spans the full 18-metre beam and is centred around a Jacuzzi and a swimming pool described as long enough for laps and deep enough for diving.

Further aft, a large dry dock handles a 12.5-metre sportsfish tender via a sledge system rated to a 16-tonne load capacity that extends over the swim platform into the water. Once deployed, the tracks retract, transforming the tender well into a sheltered, teak-lined space, with a flat hydraulic beam capable of closing off the area entirely.

She accommodates up to 18 guests across nine staterooms, with 36 crew. Her cruising speed is 20 knots.

Beneath her architecture is an Ice Class 1D hull, allowing her to operate in light ice conditions. No destination is effectively beyond reach.

The Propulsion Picture

Nausicaä has been designed with provision for a future methanol fuel cell system, allowing methanol to be converted into hydrogen to generate electricity as the technology develops within the superyacht sector. She currently operates on diesel-electric propulsion.

It is worth being clear about what that means. Feadship’s Breakthrough, delivered in 2025, became the world’s first superyacht with hydrogen fuel cells actually running, sixteen cells generating 3.2MW, fed by cryogenic liquid hydrogen stored at -253°C. Nausicaä is not yet at that point. The infrastructure is built in; the system itself will follow as the technology matures.

The decision to build the vessel fuel-cell-ready rather than delay delivery for a system that is still developing is a rational one. It reflects how the industry is genuinely moving: not in a single leap, but in stages, with each new build positioned to receive the next generation of technology without requiring a full rebuild.

Photo: Tom van Oossanen

After Delivery

Following delivery, Nausicaä was spotted transiting the Kiel Canal in Germany, the standard passage from the Baltic yards toward the North Sea and onward. She is understood to be heading toward Gibraltar.

Why It Matters

Two things stand out about this delivery: one about design, one about engineering.

On design: the consistent delivery of a six-year-old concept, unchanged, through four years of active construction is genuinely rare. It requires a yard willing to find solutions rather than negotiate the design down to what is easier to build, and a client with the clarity and discipline to hold the line throughout.

On engineering: the fuel-cell provision is not a headline feature. It is infrastructure. The decision to build it in now, before the technology is commercially proven at superyacht scale, speaks to how the more forward-thinking yards are approaching the next decade. Not waiting for the market to settle, but building toward where it is heading.

Photo: Tom van Oossanen

Nausicaä is Lürssen’s fourth superyacht delivery this year. The yard currently has nine vessels over 100 metres in development, including the recently launched 101.4-metre Project Ziggy.