The superyacht sector is often touted as a hotbed of innovation, but not many new ideas make it into the mainstream. From innovative rigs and biomimicry to topological hull design and energy recovery, they need owners with deep pockets willing to take a leap of faith – and that’s easier said than done. <img src="https://photo-assets.superyachttimes.com/photo/361651/image/large-f85f6aadfc87033d06eec52838e00f3c.jpeg" data-gid="gid://syiq/Photo/361651">When the <a data-gid="gid://syiq/Yacht/385" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Maltese Falcon88.0m (288'9&quot;)Perini Navi2006">Maltese Falcon</a> first took flight in 2006 she proved a point: that when a pioneering owner – in this case Tom Perkins – is willing to push boundaries with designers and engineers to explore innovative ideas, the superyacht industry can realise ground-breaking solutions that have either laid dormant for decades, or open up new tech for future decades.Fast forward almost 20 years and <a data-gid="gid://syiq/Yacht/385" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Maltese Falcon88.0m (288'9&quot;)Perini Navi2006">Maltese Falcon</a> also teaches us that even with proof of concept, some ideas still struggle to break through to the mainstream. The Dynarig, developed from the original 1960s concept designs by Wilhelm Prölss, wouldn’t be repeated until the launch of <a data-gid="gid://syiq/Yacht/4795" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Black Pearl106.7m (350'1&quot;)Oceanco2018">Black Pearl</a> in 2017. The confirmation last year of a 57-metre Dynarig catamaran in build at <a data-gid="gid://syiq/Company/4342" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Echo Yachts (Company)">Echo Yachts</a> in Australia only highlights the slow uptake.&nbsp;“Now that there are two demonstrators for the Dynarig we see momentum catching up,” says Mark Leslie-Miller, partner at <a data-gid="gid://syiq/Company/230" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dykstra Naval Architects (Company)">Dykstra Naval Architects</a> that developed the Dynarig together with Damon Roberts of Insensys and <a data-gid="gid://syiq/Company/51" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Perini Navi (Company)">Perini Navi</a>. “I still wouldn’t go as far as to say that the entire industry is getting more adventurous, although I’d like to think that is the case.”In the same year that <a data-gid="gid://syiq/Yacht/385" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Maltese Falcon88.0m (288'9&quot;)Perini Navi2006">Maltese Falcon</a> was delivered, <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> unveiled the first of its Future Concept designs at the Monaco Yacht Show. Developed by <a data-gid="gid://syiq/Company/30" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="De Voogt Naval Architects (Company)">De Voogt Naval Architects</a>, the idea behind the ongoing series was to develop concepts that blended <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship’s</a> yacht-building experience with the boldest visions that have yet to see the light of day. From the beginning these concepts were required to meet one key criterion: they had to be buildable within five years.<img src="https://photo-assets.superyachttimes.com/photo/361648/image/large-bc6b13e7e5a07984361900f624d3ec88.jpg" data-gid="gid://syiq/Photo/361648">From morphing decks and clean propulsion systems to reimagining space design and underwater viewing lounges, the <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> concepts have covered a lot of ground and quickly proved their value. The F-stream concept, for example, set the stage for the energy-efficient drivetrain on Breathe in 2010, which in turn was a direct inspiration for the hybrid-powered <a data-gid="gid://syiq/Yacht/5598" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Savannah83.5m (273'11&quot;)Feadship2015">Savannah</a> just five years later.&nbsp;Fauna and FloraBreathe also drew on another major theme in everything from its superstructure shell design to its propulsors and appendages: biomimicry. Biomimetics – drawing on nature’s evolved solutions to inform structural engineering, energy efficiency and other elements – can be traced back to ancient times. Since then, it has gathered pace – the Eiffel Tower is said to be based on the human femur; the Crystal Palace built for London’s Great Exhibition in 1851 drew on the structure of waterlily leaves to support its 300,000 panes of glass; and Velcro was invented when Swiss engineer George de Mestral studied the small thistle-like burrs that became stuck in his dog’s fur.Breathe’s superstructure took the concept of skin temperature variations found in a zebra’s stripes to encourage natural air flow and ventilation, but the design also borrowed from marine fauna in its underbody, applying the idea of tubercles – the knobbly protuberances found on the leading edge of humpback whales’ pectoral fins – to increase lift and efficiency of the rudders.Tubercles have been shown to act as passive-flow control devices in wing form that improve performance and manoeuvrability, and as such are being explored for a range of applications from wing design to turbine blades. For Frank Fish, marine biologist and professor, the first awakening came in the early 1980s when he noticed the leading-edge bumps on a humpback whale model in a gift shop, which made no sense compared to what he knew about fluid mechanics and having a straight leading edge. Intrigued after studying the fins, he reached out to mechanical and aerospace engineer Philip Watts.&nbsp;“I had already been working in biomechanics so understood the importance of biomimicry,” says Watts. “So I ran some fluid dynamic simulations of wings with and without tubercles and found they increased the lift, and simultaneously reduced the drag – and that’s a spectacular achievement. Tubercles focus the flow between the bumps, and that focused flow helps keep the flow attached to the wing while also helping isolate the lift between the tubercles.”The pair joined forces with late entrepreneur Stephen Dewar to form WhalePower Corporation in 2005. Further testing on wing prototypes showed 20 per cent energy savings, improved efficiency, more stability and greater durability.It’s not hard to see the potential applications in yachts, from stabiliser fins to HVAC fans – and propellers. Various research projects on the latter have shown the potential benefits, particularly with regard to cavitation, which both damages propeller blades over time and is a key factor in the propagation of underwater radiated noise (URN) – now a key focus of marine environmental regulations. For example, numbers published by the ABM Hydro (Applied Biometrics Marine Hydrodynamics) group at the University of Newcastle show reduction in cavitation volume in a ducted propeller by up to 50 per cent, while improving propulsive efficiency by up to 6.5 per cent in heavy-cavitating conditions.<img src="https://photo-assets.superyachttimes.com/photo/361646/image/large-4facd959dfdf51c7ad17a2b7a326422c.jpg" data-gid="gid://syiq/Photo/361646">Tubercles are not the only bio-inspiration making their way into yachting propulsors. In early 2023 Oceanco unveiled its 131-metre concept Aeolus, which features <a data-gid="gid://syiq/Company/6143" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="ABB Group (Company)">ABB’s</a> Dynafin electric propulsion technology. The Dynafin is a cycloidal propeller system that was inspired by the dynamic motions of a whale’s fluke. It generates thrust using profiled vertical blades that rotate around the axis of a disc plate and around their own vertical axis to change the angle of attack in sync with the rotation of the plate, so that each blade can provide thrust in any direction. Adrien Thoumazeau of <a data-gid="gid://syiq/Company/5009" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lateral Naval Architects (Company)">Lateral Naval Architects</a> calculates that the Dynafin would save 10 to 15 per cent of fuel on an Atlantic crossing for Aeolus compared to an optimised azipod system. <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> also prescribed Dynafins for its 2023 Dunes concept and is working with <a data-gid="gid://syiq/Company/6143" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="ABB Group (Company)">ABB</a> engineers to develop improvements for better integration in a yacht.&nbsp;The VSP draws on a concept first developed nearly a century ago by Austrian engineer Ernst Schneider, who was inspired by the movement of fish. Cycloidal drives like the Voith Schneider Propeller (VSP) are a simpler version insofar as the individual blades are fixed. VSPs are in use on working vessels and have been proposed for the 70-metre Project Master conversion at <a data-gid="gid://syiq/Company/429" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="ICON Yachts (Company)">Icon Yachts</a>, but Dynafins potentially have more applications in superyachts. As part of an electric propulsion power system, they are also fully compatible with zero-emission technologies.&nbsp;“Due to the individual blade control you can mimic the whale-tail motion, providing the efficiency gain when sailing at the most probable speeds of 12 to 15 knots,” says Giedo Loeff, head of research and development at <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a>. “The VSP works well for low-speed applications and high bollard pulls, like tugboat operations.”&nbsp;Formally unveiled in May 2023, it remains to be seen if the Dynafin will catch on, but it is further evidence of the opportunities buried in millions of years of evolution.Skeleton StructuresIn 2015, <a data-gid="gid://syiq/Company/230" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dykstra Naval Architects (Company)">Dykstra Naval Architects</a> and Claydon Reeves unveiled a striking 46-metre sailing yacht concept called Exo, which featured extensive use of glass in the hull thanks to an extraordinary hull structure quite unlike traditional frames and longitudinals. The idea originally came from a German intern specialising in topology optimisation.<img src="https://photo-assets.superyachttimes.com/photo/361644/image/large-a3f603df772cec0588d5b591bb16aed1.png" data-gid="gid://syiq/Photo/361644">“He got inspired and asked if we could see an application for this cool new technology,” &nbsp;says Leslie-Miller. “It led to us tackling that structural challenge of having a large piece of glass in the topsides and deck and using topology optimisation to design around the stresses inherent in a sailing yacht.”<img src="https://photo-assets.superyachttimes.com/photo/361649/image/large-76bcca2920aac1749a6690880f76b549.jpeg" data-gid="gid://syiq/Photo/361649">Topology optimisation is a mathematical approach that optimises material use within a given design space for a given set of loads and boundary conditions. By combining this with the idea of bio-inspired design, it is possible to create unconventional structures that combine light weight with structural strength. The study partner for Exo was the Alfred Wegener Institute in Bremerhaven, Germany, whose research has focused on the complex shell structures of diatoms, unicellular planktonic organisms, and their application in structural design. The result was an initial implementation in 2005 of ELiSE (Evolutionary Lightweight Structure Engineering) as a systematic approach to design. The <a data-gid="gid://syiq/Company/230" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dykstra Naval Architects (Company)">Dykstra</a> team inputted data on load paths through components such as the stays, shrouds and keel box, and then let the software do its magic. <img src="https://photo-assets.superyachttimes.com/photo/361650/image/large-d3c964305471d63f17a7908b0b70b8d1.jpeg" data-gid="gid://syiq/Photo/361650">“What we saw very clearly was that a lot of the force goes into the beam shelf, which is generally a very stiff element,” explains Leslie-Miller. “The challenge was that we wanted to have a big glass opening across that boundary, so the topology optimisation was used to lead the forces around that glass. From that we did a full FEM analysis of the structure, which showed that this was a very effective and efficient way to make this particular concept feasible.”Leslie-Miller admits that the combination of topology optimisation and biomimicry for the overall hull structure won’t replace conventional design outright, in part also because of the added cost, but that doesn’t mean it couldn’t have interesting applications aside from alternative hull designs. One area might be large bimini structures, which need to be lightweight but can be tricky to design because there are several load conditions to consider. <img src="https://photo-assets.superyachttimes.com/photo/361643/image/large-6fa88f4b3be1f9c5529d29febdd8b2b6.jpg" data-gid="gid://syiq/Photo/361643">“I think wherever there is a clearly defined set of load cases it could be super interesting,” he says. “For example, in a retractable keel that always presents a structural challenge with clearly defined load cases such as grounding with the keel fully down. You could optimise the structure around that load path to make it as lightweight as possible.”Ride the WavesWith energy efficiency and carbon neutrality ever higher on the agenda, Giedo Loeff is proposing the Hammerhead – a pair of retractable fins located aft of the anchors that serve as stabilisers, but also harness wave energy to feed into the yacht’s grid. The idea features alongside the methanol hybrid fuel cell and battery power system in <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship’s</a> latest concept project, 75-metre C.<img src="https://photo-assets.superyachttimes.com/photo/361654/image/large-2de9a6282637ddae101f7c201b682a6e.jpg" data-gid="gid://syiq/Photo/361654">“When I was working at the Maritime Research Institute Netherlands (MARIN) back in 2007, I was investigating how to regenerate wave energy,” says Loeff. “There are ship’s motions that are excited in waves, and the Holy Grail is to be able to reduce those motions and generate electricity at the same time. But designing a system like that is not so simple, which is what this concept is about.”Complicating the design is the fact that the fins have two axes of articulation – rotational, which is the conventional way a stabiliser fin adjusts its angle of attack, but also vertical, which provides the motion that can drive a generator.&nbsp;“There’s a massive force associated with the movement, because in the foreship where the fins are located their motion relative to the water will be quite substantial in any significant sea of, say, one to two metres, which is a very probable scenario,” says Loeff.&nbsp;There are further benefits of the system, because besides reducing motions and generating electricity, you’re also reducing resistance – energy is lost in the motion of a ship, so reducing that motion means less propulsion power is needed. Loeff’s solution would primarily be for use under way as opposed to at anchor, and it would be a standalone active system that would negate the need for separate stabilisers.&nbsp;“The mechanical design presents the difficulty, because you would &nbsp;have very high torque and forces acting on the bearing systems,” he says. “You would need to control the angle of attack of the fins to prevent a stall and ventillation, and that would need to be active control based on the motion, so it won’t be easy, but it’s not something we feel is impossible.” <img src="https://photo-assets.superyachttimes.com/photo/361655/image/large-ec523e473842f77cdd02df4d25d6b0bd.jpg" data-gid="gid://syiq/Photo/361655">Loeff suggests that yachts between 40- and 100-metres are the ideal platform for the technology as they fit into the typical wavelength of seas that yachts most commonly come across. The predictions for energy produced are also striking: 60 to 80 kilowatts for a yacht like C in the seas it would encounter on an Atlantic crossing, plus a further gain in propulsive energy. Putting it into perspective, Loeff suggests it could cover around half the hotel load.Although some CFD work has been done, the system has not yet been put through more detailed design iterations, which would be for the likes of suppliers like <a data-gid="gid://syiq/Company/6426" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Kongsberg Maritime (Company)">Kongsberg</a>, SKF or <a data-gid="gid://syiq/Company/5020" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Quantum Marine Stabilizers (Company)">Quantum</a>, which is also a reason why Loeff pushed the idea out through LinkedIn with posts that garnered considerable attention across the industry.&nbsp;“Much like we don’t develop fuel cells in-house, what we’re looking for is this combination of client and supplier to make the next step, which would be the conceptual design of the mechanical parts or further proof of concept through model testing.”This article was featured in&nbsp;<a href="https://www.superyachttimes.com/magazine/how-to-build-it-issue-7" rel="noopener noreferrer" target="_blank" title="">Issue 7 of How To Build It</a>.&nbsp;<a href="https://issuu.com/superyachttimes/docs/how_to_build_it_-_issue_7_spring_2025" rel="noopener noreferrer" target="_blank" title="">You can read all the articles from this edition&nbsp;here, and stay up-to-date with all previous editions&nbsp;here</a>.

How nature is steering the future of superyacht technology

Dykstra Claydon Reeves EXO 46m sloop concept

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Exo 46 skeleton

ABB Dynafin

Feadship Breathe concept

Topology optimisation

Diatom shell

Humpback pectoral fin tubercles

Feadship yacht Concept C exterior

When Maltese Falcon launched in 2006, she proved bold owners and daring design can push superyacht innovation into groundbreaking territory.

Humpback whale

Project YB256 is a 45-metre steel and aluminium motor yacht under construction at <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort Shipyard</a> in the Netherlands. The first collaboration between the family-run yard and <a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design Naval Architects</a>, the yacht’s retro styling masks a modern and highly capable cruiser engineered for long-distance voyaging.<img src="https://photo-assets.superyachttimes.com/photo/396216/image/large-6096248c4df8137326bee068ed36838f.jpg" data-gid="gid://syiq/Photo/396216">The impossibly picturesque village of Monnickendam on the western shore of the Markermeer, a vast freshwater reservoir not far from Amsterdam, has been home to the <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort Shipyard</a> for more than a century. Wedged into a narrow strip of dockland between the old town centre and the water’s edge, space is as precious as the custom yachts it builds, but over the years the management has perfected a choreography of space and timing to ensure multiple projects can progress without tripping over one another.“<a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design</a> is just a few kilometres down the road and we’ve often wanted to work with them, but the stars never aligned,” affirms Klaas Hakvoort, fourth generation director of the shipyard with his brother Albert Jr. “In this case, the client wanted Dutch pedigree, was happy with our pricing, and the complexity of the project was a perfect match for a custom builder like us.”<img src="https://photo-assets.superyachttimes.com/photo/396206/image/large-71da8891dd01ddb5eed6ecc0455c82e1.jpg" data-gid="gid://syiq/Photo/396206">Project YB256 was inspired by <a data-gid="gid://syiq/Yacht/6037" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Blue II55.99m (183'8&quot;)Turquoise Yachts2020">Blue II</a>, the 56-metre expedition vessel with classic lines by <a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design</a> launched by <a data-gid="gid://syiq/Company/224" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Turquoise Yachts (Company)">Turquoise Yachts</a> in 2020. <a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design</a> partners Andre Hoek and Ruurt Meulemans translated the client’s admiration for the retro-influenced yacht into a more compact platform that would echo the same timeless elegance free of nostalgic mimicry, while embracing modern technology and efficiency. The owner’s exacting brief included full wheelchair accessibility, an elevator connecting all deck levels, and transatlantic capability.“The hull and superstructure were conceived to balance classic proportions with today’s efficient hydrodynamics,” says Ruurt Meulemans. “Computational fluid dynamics [CFD] analysis informed every curve, refining the bow shape and optimising volume distribution to reduce resistance as much as possible and improve wake flow to the twin propellers. The objective was a smooth, efficient ride across a transatlantic cruising envelope of close to 4,000 nautical miles – no small achievement for a vessel under 400 gross tons.“<img src="https://photo-assets.superyachttimes.com/photo/396218/image/large-f219694742e3fedf1f00ff2c0b5c4003.jpg" data-gid="gid://syiq/Photo/396218">Meeting these requirements called for some clever engineering based on robust, proven solutions. Finite element analysis (FEA) guided the placement of bulkheads, stringers, and the keel to ensure structural integrity under long passages without compromising interior volume. The challenge was compounded by hybrid-assisted propulsion comprising twin 1,000-hp MAN diesel engines paired with electric motors and supported by a lithium-ion battery bank.The system integrated by <a data-gid="gid://syiq/Company/3869" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Eekels Technology BV (Company)">Eekels Technology</a> allows for flexible operational modes. Electric mode provides a few hours of silent propulsion at low speed, ideal for manoeuvring in harbours or environmentally sensitive zones. In diesel mode the electric motors can function as shaft generators to reduce fuel burn on extended passages. The electric motors also add redundancy for additional peace of mind far from home. <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort</a> had direct experience of the latter: during sea trials of 61-metre <a data-gid="gid://syiq/Yacht/8621" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Asia61.0m (200'2&quot;)Royal Hakvoort Shipyard2024">Asia</a>, an electrical fault caused an engine shutdown, but the gearbox-mounted e-motors allowed the crew to manoeuvre safely away from an offshore wind farm.<img src="https://photo-assets.superyachttimes.com/photo/396210/image/large-bfbd4613c1cb6d84c9fb37fa9b5d37a0.jpg" data-gid="gid://syiq/Photo/396210">The battle for spaceA signature feature of the yacht is the continuous ribbon of wraparound glazing on the main and bridge decks – 17 tonnes of it. The bulwarks are also glass and the hull windows incorporate a dot-fade pattern that blends with the white hull from a distance. Combined with the classic sheer line and bronze-metallic funnel, the green-tinted glass adds a touch of understated elegance that hints at an era that never quite existed – but should have. The wheelhouse windows are not full-height, but the aluminium surfaces beneath will be clad with glass and the same green reflective finish to create the visual effect of uninterrupted glass.&nbsp;Extensive glazing has a downside, however: heat. Solar load becomes a critical issue, especially for a yacht destined for hot climates. One option is to increase HVAC capacity, but a smarter one is to engineer better insulation. <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Hakvoort</a> chose the latter. A two-year development programme with glass specialist Royal-Maritiem sought the ideal balance of solar control, privacy, clarity, structural strength, and colour uniformity. Each double-glazed laminated pane is filled with argon gas and coated with a low-emissivity metal film tuned to deliver the desired green tint. The result is a 50 precent reduction in heat transfer compared to conventional marine glass.<img src="https://photo-assets.superyachttimes.com/photo/396219/image/large-043a6cfbb4c2ee18f77e9eca62c4d295.jpg" data-gid="gid://syiq/Photo/396219">But heat is not the only issue. Full-height windows also eliminate the storage units and hidden cavities normally used to route ducting, wiring, and AC trunking, pushing the technical infrastructure inward. As a result, space became the defining constraint and the build team had to fight for every cubic centimetre. <a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design</a> has deep experience of designing sailboats where space is always at a premium, but it was up to the shipyard to find ways to integrate complex systems into tight envelopes.“Nothing fitted, so we had to make it fit,” says Klaas, which could be the unofficial motto of the project. “By the time everything is installed, the engine room will be very full, but accessible and maintainable. Not cluttered – engineered.”The electrical switchboards span the full height of the engine from port to starboard across, an unavoidable result of the hybrid system. The engine room itself relies on seawater-fed heat exchangers because there wasn’t room for conventional air-cooling systems. The pool doubles as a tender bay with a dump tank and its own dedicated crane compartment that closes flush with the teak deck. Under the sunbed on the foredeck is a two-storey garage for the crew tender and a pair of PWCs. Add the elevator, wider side decks and interior passages sized for wheelchair access, and every available every void had to serve a purpose.<img src="https://photo-assets.superyachttimes.com/photo/396209/image/large-486995c89e482f3860ee5f1204771fb6.jpg" data-gid="gid://syiq/Photo/396209">Hidden in plain sightThe metallic bronze faux funnel is more than a charming styling cue; it also highlights the kind of engineering concealment that defines the whole project. Since the yacht has underwater exhausts, there was no need for a traditional dry stack – nor was there space to route ducting up to one. Instead, the funnel became the home of the fresh-air unit that draws in and purifies outside air for the HVAC system. Fitting it inside that tight volume meant some early design assumptions had to be reworked.&nbsp;Routing the air quietly around the yacht from high up in the vessel posed further challenges. The onboard noise targets are uncompromising and the owner’s suite is engineered for a harbour maximum of 44 decibels, although <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Hakvoort</a> typically achieves lower. Underway, the expected levels sit in the low 50s – quiet enough that the only audible sound should be the soft splash of water along the hull. Modern superyachts achieve such low mechanical noise levels that airflow has become the primary acoustic concern, not the engines or generators.<img src="https://photo-assets.superyachttimes.com/photo/396212/image/large-a2aeb88e2ca030f7dc36a4bed74abb21.jpg" data-gid="gid://syiq/Photo/396212">“You won’t hear machinery these days – you’ll hear air moving through the ducting,” confirms Klaas. “That’s why we focus obsessively on silencing ducts, bends and terminations.”Consider the HVAC ducting for the crew quarters. To reach the lower deck forward, it has to pass under the bed in the owner’s stateroom, negotiating several dog-leg bends in the process. Air accelerates noisily through tight turns due to mass conservation and pressure shifts, so the yard routinely uses flexible elbow sections with larger diameters and internal damping to reduce turbulence and suppress sound. <img src="https://photo-assets.superyachttimes.com/photo/396214/image/large-892daf254a9606fb0d0d5fed5e58dda4.jpg" data-gid="gid://syiq/Photo/396214">Elegance with an edgeThe aluminium superstructure was built at <a data-gid="gid://syiq/Company/5231" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Alu-bouw Fryslân BV (Company)">Alubouw Fryslan</a> in Franeker and joined to the steel hull at Buijs Shipyard – the hull builder – before being towed to Monnickendam, but <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort</a> has its own joinery division and stainless-steel department that produce most of the fixed furniture and deck hardware in-house. Klaas points out the custom-engineered hinges used for the exterior doors as an example of the shipyard’s hands-on approach. During development, these hinges were tested in the most practical way imaginable: by suspending 40 kg weights to a toilet door heavily used by shop-floor workers. Any weaknesses that surfaced were corrected before installation.&nbsp;Another example is the aluminium hull platform that folds out from the topsides amidships and connects to the main deck by way of a boarding ladder for tender access. The platform being assembled in the metalworking department uses a hydraulic rotary or slew drive – more compact than conventional rams and able to generate high torque in tight spaces, it is a solution that has been refined by <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort</a> over years of building canoe-stern vessels.<img src="https://photo-assets.superyachttimes.com/photo/396211/image/large-9d9af2d4a7ba3a495473f7ac81ad923c.jpg" data-gid="gid://syiq/Photo/396211">Although capable of crossing the Atlantic, YB256 will primarily be used for short, comfortable runs with the frequent returns to port and high hospitality demands typical of most operational profiles. Every aspect of the interior has been conceived with wheelchair accessibility in mind, including a transformer-style platform in the stern. Guest and crew flows remain fully separated, which is not always the case on yachts of this size. The lower deck houses two full-beam VIP suites arranged around the main lobby and elevator; a third space will be used as an office/gym with a built-in recess for a running machine. The bridge deck is reserved for the owner’s sky lounge, while the captain’s cabin has been relocated to the lower deck. Crew areas have been configured to maximise discretion and operational efficiency with service and storage areas scaled to support day-use cruising.After touring the shipyard and the yacht, the lasting impression is that YB256 is not just a modern yacht in retro clothing. It is a study in constraint-driven design and smart engineering by a shipyard for whom “custom” is a vocation, not a marketing term. Its timeless elegance is more than skin deep, the result of many difficult decisions made in the belief that contemporary and classic can comfortably coexist – both in appearance and in engineering.<img src="https://photo-assets.superyachttimes.com/photo/396220/image/large-95656d748cc09cc4e461acdaecb835d0.jpg" data-gid="gid://syiq/Photo/396220">

Inside the build of a 45m Royal Hakvoort superyacht

Inside Royal Hakvoort's Project YB256, in collaboration with Hoek Design.

<a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a>&nbsp;is both a leader in the field of waterjet technology and a point of reference for serial production tenders. Active across the military, commercial, and superyacht sectors, the Italian brand is now applying its propulsion and manufacturing know-how to the specialist market for limousine tenders.<img src="https://photo-assets.superyachttimes.com/photo/396631/image/large-062ebf001bce4c2cc3c7a9d7b4ad2e91.jpg" data-gid="gid://syiq/Photo/396631">The small town of Albairate in landlocked Lombardy might seem a strange place for a boatbuilder to set up shop, but it is closely linked to the brand’s origins in one of Italy’s richest agricultural regions. Luigi Castoldi was a pioneering engineer in the agricultural machinery sector through his company BCS, which is still extant today. He began exploring waterjet propulsion – still a novelty in the early 1960s – because boats were damaging their propellers on the shallow bottom of the nearby River Ticino.&nbsp;After importing a waterjet drive, he set about re-engineering it to create a more durable and effective design. His first mass-produced <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> waterjet, model Jet 05, made its debut at the 1969 Genoa Boat Show. Since then, over 40,000 <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> waterjets have been delivered around the world, from the compact 224 unit up to the mighty 600 HCT drive that can support installed power of up to 2,700 horsepower.<img src="https://photo-assets.superyachttimes.com/photo/396632/image/large-4d83f3db58d65cf02a38baa8d387c061.jpg" data-gid="gid://syiq/Photo/396632">Today, the company is still family-owned under the directorship of Giacomo Castoldi, Luigi’s grandson, who with his father Franco spearheaded the company’s diversification into the tender market with its own range of diesel-powered jet tenders. The first model, the JT 18 Pro in 1998, served as the blueprint for the current range, from the entry-level Jet Tender 14 up to the 10.5-metre Jet Tender 34. The latter also provides the technical platform for the Jet Tender 34 Limo, the company’s first venture into the limousine market.Why waterjetsWaterjet propulsion for superyacht tenders offers several advantages over traditional propeller-based systems. These include enhanced manoeuvrability, higher efficiency and durability, lower noise and vibration, and the reversing bucket can ‘crash stop’ a boat in less than twice its own length. But arguably the most critical feature – as Luigi Castoldi was quick to realise – is shallow draft.<img src="https://photo-assets.superyachttimes.com/photo/396635/image/large-accb3204fb1c42a0f2bfa16fdfac9f5c.jpg" data-gid="gid://syiq/Photo/396635">“Jet tenders can drive right up to a beach, and most of our models are equipped with bow ramps as standard,” says Giacomo Castoldi. “Combined with a folding console, low draft also means they occupy less vertical space inside the tender garage, while the lack of exposed propeller blades reduces the potential for injury to swimmers, divers, or marine life.”Over the years, <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> has finessed its waterjet technology. Unlike other systems requiring external gearboxes, all <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> waterjets except the entry-level Turbodrive 224 DD have integrated gearboxes. This results in a more compact overall footprint, which means more space for passengers and luggage storage, and simplifies the installation process while reducing the potential for errors or rework. They are also equipped with a patented anti-clogging system that enhances the waterjet’s reliability in challenging conditions. The Clear-Duct unclogging system works by reversing the direction of the impeller and simultaneously opening the protective intake grid to flush out any debris that may have accumulated.<img src="https://photo-assets.superyachttimes.com/photo/396660/image/large-44d8926e35b1304d60e5cdbcb14c3137.jpg" data-gid="gid://syiq/Photo/396660"><a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a>’s latest waterjet drives that carry the HCT acronym have been redesigned to offer a 12% increase in performance compared to previous iterations. Advancements in impeller design, a pre-stator vane system, and an updated post-impeller stator work together to improve the flow of water through the system, reduce cavitation, and ultimately deliver more thrust combined with lower fuel consumption.&nbsp;“These enhancements are largely thanks to investment in CFD analysis,” says Giacomo, “Combining fluid dynamics with our own practical engineering know-how has generated a lot of new ideas."<img src="https://photo-assets.superyachttimes.com/photo/396615/image/large-28e2be0f5dedca48b4f2f92405172d02.jpg" data-gid="gid://syiq/Photo/396615">Total control<a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> also produces its own control systems, from simple mechanical options to the sophisticated ACES system developed in collaboration with <a data-gid="gid://syiq/Company/7877" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Xenta (Company)">Xenta</a>. Powered by a 32-bit embedded processor and utilising a proprietary CAN bus network protocol, the ACES system delivers precision control of engine RPM, waterjet steering nozzles and reversing buckets when transitioning between docking and cruising modes. Additional functions include dynamic positioning and smart anchoring, which simulates mechanical anchoring by swinging around a virtual GPS point. Adaptive steering logic can even provide ‘propeller mode,’ which recognises when the vessel is in reverse to simulate conventional propeller behaviour – a useful feature for operators transitioning to waterjets.To maintain quality control, most of the waterjet components are machined in-house, an exception being the Duplex stainless-steel impellers that rely on precision investment casting technology. With regard to tender production, the whole process – from the 3D design, hull lamination and tube fabrication to the hydraulic and electrical systems – is carried out internally before final testing in its own water basin in front of the factory.<img src="https://photo-assets.superyachttimes.com/photo/396658/image/large-b3c15147d7d49ce31a9b749e8a305ff2.jpg" data-gid="gid://syiq/Photo/396658">When <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> began production of jet tenders in the mid-90s, it decided from the start to take a platform-based approach with fixed hull forms designed around its own propulsion system. By standardising the production process, <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> ensures consistent quality while reducing unit costs through repeated tooling and manufacturing processes. Additionally, serial production provides opportunities for continuous optimisation, further enhancing the performance and quality of each new upgraded model. As the range evolved, customised interior materials, finishes and layouts have become the norm to meet the specific needs of individual clients without having to build costly and time-consuming one-offs.&nbsp;The company has applied exactly the same production philosophy to its new Jet Tender 34 Limo designed by <a data-gid="gid://syiq/Company/153" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Nauta Yachts S.r.l. (Company)">Nauta Design</a>. Conceived initially for a fleet of luxury cruise ships currently under construction, each ship will carry four <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> Jet Tender 34 Limo tenders to deliver a sophisticated ship-to-shore guest experience.<img src="https://photo-assets.superyachttimes.com/photo/396657/image/large-a20e0e70cb5a086260c495f6e811d4a1.jpg" data-gid="gid://syiq/Photo/396657">Limo luxury&nbsp;Historically, the limousine tender segment has been defined by high levels of customisation, where each unit is tailored specifically to the design and needs of a particular superyacht. While this approach allows for alignment with the mothership’s aesthetic, it often results in longer lead times, higher costs, and compromises in terms of performance and systems integration. <img src="https://photo-assets.superyachttimes.com/photo/396633/image/large-bb3ca9a1c828124e6a74dc5b67525448.jpg" data-gid="gid://syiq/Photo/396633"><a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a>’s entry into this market introduces a shift toward standardised, platform-based design, which allows for quicker production times and greater system optimisation, while still providing owners with a high degree of personalisation, particularly in the interior architecture. Two primary interior layouts are offered: one with all-seated configurations for maximum comfort, and another combining seating with a pantry and bathroom for longer transfers. Material finishes can also be tailored to suit individual preferences."This project represents a new chapter for <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> that expands our offerings to new markets, while maintaining the commitment to innovation, quality, and luxury we are known for,” says Giacomo. “The opportunity arose to enter the limousine tender market with a semi-serial product that embodies our construction philosophy of creating optimised vessels rather than one-offs.”<img src="https://photo-assets.superyachttimes.com/photo/396625/image/large-24bbf67840c4bba049f3423e568ddbaa.jpg" data-gid="gid://syiq/Photo/396625">“In practical terms, we estimate that our serial-produced limousine tenders are priced at least 35% lower than equivalent full-custom examples,” adds <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a>’s commercial director Luca Taccani, “without sacrificing the luxurious finish or technical sophistication that clients expect.”In addition to the four limo tenders, <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> is also supplying the cruise ships with two customised Jet Tender 28 SV units. The ‘SV’ stands for ‘Support Vessel,’ and the model is specifically designed to work in tandem with the limousine tenders, with an enhanced bow sun-pad, extensive storage, pantry, and premium features like a T-top.<img src="https://photo-assets.superyachttimes.com/photo/396622/image/large-6c33afd5ceeb462bb96cd2592a9fa250.jpg" data-gid="gid://syiq/Photo/396622">The flywheel effect&nbsp;As <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> has expanded its offerings and capabilities, its workforce has grown accordingly and is now nearing 100 direct employees. In terms of business performance, the company has seen consistent growth, especially over the past two years since Luca Taccani joined the company. Annual turnover is currently distributed fairly equally across the waterjet and tender markets (50% and 40% respectively) with the remainder from spare parts and commissioning activities.&nbsp;Although <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> builds its tenders in series, each sale is essentially a one-off transaction with an end client. Its propulsion products, on the other hand, can generate recurring clients that expect reliable and ongoing service. Naval procurement involving multiple waterjet units is an expanding sector for the company, for example. To meet this demand, <a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a> has made a deliberate effort to ensure the availability of components, stocking spare parts for older models well beyond customary timelines – often for more than ten years.“We’ve focused strongly on spare parts and after-sales support with dedicated back-office staff for service management,” says Luca Taccani. “This long-term outlook not only boosts customer loyalty but has also proven financially advantageous. As raw material costs have risen sharply, having a ready stock of components means we’ve been able to avoid significant cost increases.”<a data-gid="gid://syiq/Company/2027" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Castoldi S.p.A. (Company)">Castoldi</a>’s trajectory over the past few years reflects a competitive company that is expanding its product range while also refining its operational efficiency and service capabilities. By focusing on technical innovation and long-term service, it has effectively created a “flywheel” effect, whereby small but consistent wins build momentum over time in a self-sustaining cycle of growth. Moreover, the brand’s entry into the limo tender market aims to demonstrate how serial production methodologies, when combined with proprietary propulsion and rigorous quality control, can challenge the prevailing bespoke approach.<img src="https://photo-assets.superyachttimes.com/photo/396659/image/large-9f4ecad812d4f5c94c3664909275b1d8.jpg" data-gid="gid://syiq/Photo/396659">

The landlocked yard building limousine tenders

Castoldi is entering the limousine tender market with the Jet Tender 34 Limo, combining waterjet technology with a serial-production approach.

As the yachting industry begins to take alternative fuels seriously, Heikki Bergman, CEO and design manager of start-up company <a data-gid="gid://syiq/Company/8768" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Propulsion House (Company)">Propulsion House</a>, is several steps ahead. His company has developed a compact, modular methanol-electric propulsion system for yachts up to 70 metres that challenges the big marine technology brands.<img src="https://photo-assets.superyachttimes.com/photo/390298/image/large-6f876876617a86ea1297b4c7d5007042.jpg" data-gid="gid://syiq/Photo/390298">Drawing on more than two decades of experience in marine electrical propulsion, Heikki Bergman brings an engineering-driven approach to hybrid systems, with a sharp focus on real-world viability, space efficiency, and the practical constraints of small and mid-size vessels.“There’s good will in the market,” he says, “but not many customers or shipyards truly understand what they’re buying when it comes to electric or alternative-fuel systems. That’s where things often fall apart.”Now, Bergman and his team have unveiled a hybrid system he claims is capable of delivering over 5,000 nautical miles of range using methanol reformers, hydrogen fuel cells, batteries, and lightweight electric pod propulsion – all within the general arrangement footprint of an existing 45-metre, steel-hulled explorer hull designed by Frank Neubelt.<img src="https://photo-assets.superyachttimes.com/photo/390299/image/large-087f0ae7e1a2668b35e761bf7c22a0db.jpg" data-gid="gid://syiq/Photo/390299">Scaling downBergman’s journey began at <a data-gid="gid://syiq/Company/6143" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="ABB Group (Company)">ABB</a>, the Finnish leader in electrification and automation technology, where he worked on large commercial projects across Europe, particularly in the passenger vessel segment. In 2015, he identified a knowledge gap in the smaller vessel markets: while electrical and hybrid systems were becoming standard on larger ships, few people understood how to scale them down effectively for smaller yachts.&nbsp;"The big players don’t cater well to anything below 1 megawatt per propeller," he explains. "They come with massive project organisations and million-euro tickets, which just doesn’t work for yachts below 70 metres. We start from seven horsepower, up to 600 kilowatt."He founded <a data-gid="gid://syiq/Company/8768" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Propulsion House (Company)">Propulsion House</a> in 2017 as a consultancy, but it quickly evolved into a product development company. The firm now works across multiple sectors – including oil and gas – but yachting remains a core focus. The team doubled in size last year and is expected to grow again in 2026.<img src="https://photo-assets.superyachttimes.com/photo/390300/image/large-701d98e76c4b8100d4437b449c0de308.jpg" data-gid="gid://syiq/Photo/390300">Time to RethinkThe in-house propulsion system is a methanol-electric hybrid setup using the existing 45-metre explorer hull as a baseline that began with the team asking a simple but critical question: could a vessel of this size achieve 5,000 nautical miles of range using alternative fuels, without compromising usable interior volume? The answer: Yes, by completely rethinking how propulsion integrates with vessel design.At the heart of the system is the trademarked DeeCee Microgrid – a methanol-fuel-cell architecture designed for endurance, redundancy and modular installation. The system includes: six methanol reformers, which convert a methanol/water mixture into hydrogen and CO₂; six 200 kilowatt hydrogen fuel cells, fed by the reformers to generate electricity; and two 600 kilowatt battery banks, offering load balancing, peak shaving, and full-electric operation in port or during silent cruising.<img src="https://photo-assets.superyachttimes.com/photo/390301/image/large-09f5baddc586600638d912e42f93dd0f.png" data-gid="gid://syiq/Photo/390301">All the system components – fuel cells, batteries, converters – are already commercially available. Combined, they enable propulsion via two 600 kilowatt electric pods, with no shaft lines or central switchboards. Instead, the vessel uses a distributed DC network through localised electrical control units – each managing its zone independently and able to switch within milliseconds in case of blackout.“We’ve eliminated the need for a switchboard room altogether,” says Bergman. “This frees up interior volume, reduces cabling, and improves safety and redundancy.”The reforming process produces a controlled volume of CO₂, which the system can capture and store onboard for recycling. The volume of this captured CO₂ is significantly lower than from internal combustion engines – about 40-60 percent less than a diesel generator. Moreover, when taking into production methods of green methanol and e-methanol, some of which actually consume CO2 rather than release it into the air, the overall CO2 emission reduction is even higher.<img src="https://photo-assets.superyachttimes.com/photo/390305/image/large-8b7413485de1c405fa96aac8b215fe00.jpg" data-gid="gid://syiq/Photo/390305">Small, Light &amp; SmartPerhaps the most radical part of the concept is the proprietary Pulling-e Propulsion pod design. It resembles a torpedo: long, narrow, and hollow, with a stationary internal body, an outer rotating propeller shell and a 2-bladed propeller offering a good balance of efficiency and drag. Containing a permanent magnet synchronous motor and scalable from 7-600 kilowatt per propeller, there is no shaft, no gearbox, and minimal mechanical complexity. The pod can be steerable for shallow water use, or fixed with a rudder integrated into the strut that connects it to the hull.&nbsp;The unit is designed to be modular and installation-agnostic. It can be fixed horizontally to the hull, retrofitted into an old rudder socket, or even fitted with lift-enhancing struts to improve hydrodynamic flow. Unlike traditional azimuthing thrusters, which rotate 360 degrees, the pods limit steering angles but compensates via bi-directional rotation. The result is full-vector thrust control, achieved with a simpler, lighter system.<img src="https://photo-assets.superyachttimes.com/photo/390304/image/large-1e7154665ec390b5c89b7ed5b892f2e1.jpg" data-gid="gid://syiq/Photo/390304">This method also benefits noise reduction. The methanol-electric propulsion is already quiet, so the remaining main source of noise is from propeller-generated pressure pulses hitting the hull. The propellers, positioned far aft as far outboard as possible away from the hull, significantly reduce this underwater radiated noise—a growing concern for marine ecosystems.The concept isn’t just theoretical. Cambridge University’s Energy boat challenge team recognised the potential and <a data-gid="gid://syiq/Company/8768" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Propulsion House (Company)">Propulsion House</a> has been working with Marin’s top designers on the propeller optimisation, using a 15-kilowatt test unit to refine efficiency. The propellers were optimised using PropArt and PROCAL computations. A speed-power prediction based on the resistance was provided, and additional analysis was carried out in terms of steering forces and cavitation behaviour.<img src="https://photo-assets.superyachttimes.com/photo/390303/image/large-fe5f36bdbe69c88da2bda09491ac7329.png" data-gid="gid://syiq/Photo/390303">“We achieved 89 percent propeller efficiency – among the highest on the market,” says Bergman. “And when we scale up to the size used on yachts, efficiency actually increases due to the larger central hole in the propeller. And that’s just the first iteration available.”The system is also suited for retrofits. In theory at least, shaft lines could be removed entirely and the new propulsion unit installed into the existing rudder sockets, reducing the need for invasive hull perforations. The structural load is carried in a way similar to rudder mechanics, with reinforcement achieved by increasing material thickness inside the torpedo's cooling pipe. <img src="https://photo-assets.superyachttimes.com/photo/390302/image/large-279388f3d090554f024470e1514e9ec4.png" data-gid="gid://syiq/Photo/390302">A New Design OrderPerhaps most radical is the company’s approach to vessel design itself. “We start from the underwater section,” Bergman explains. “First the hull, then the propeller location, and then everything else. Not the other way around.”This inverted design process contrasts with the traditional method of selecting off-the-shelf propulsion systems first, which often forces compromises in hull shape, hydrodynamics and interior layout.With partners already on board for further testing in 2026, and interest growing among shipyards and owners, <a data-gid="gid://syiq/Company/8768" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Propulsion House (Company)">Propulsion House</a> is positioning itself not just as a technology provider, but as a strategic design partner. By simplifying systems, reducing space usage, offering real redundancy, and embracing cleaner fuels, Bergman believes a better class of hybrid yacht is not only possible – it’s ready to build. “There’s no fantasy here,” says Bergman. “This could be built tomorrow.”&nbsp;

Heikki Bergman Propulsion House CEO Interview

Propulsion House CEO sites down with SYT to discuss the compact, modular methanol-electric propulsion system for yachts.

Inside the push for methanol-electric yacht propulsion with CEO Heikki Bergman

If home is where the hearth is, then the galley is certainly a fundamental element of any superyacht. Whether enjoying a 10-course taster menu or a teppanyaki treat on deck, food is central to the onboard experience. We take a look at how to avoid second-rate cooking spaces and equipment.When people talk about superyachts, the highlights always seem to revolve around the same things: the beach club, the sundeck, the pool, the master stateroom. The galley barely gets a second thought, until you spend time on board –&nbsp;then the food and its service take centre stage and any issues to do with layout, design or installation become belatedly obvious.Naturally, safety is paramount. Galleys present a host of hazards from deep fryers and steamers to rotating equipment and sharp blades. Fire suppression, hygiene, ventilation, materials, and so on, are governed by classification society rules, but small details like having rounded internal radii instead of sharp corners in stainless steel cabinets help prevent dirt accumulation and make cleaning much easier for galley staff. Ergonomics and design are equally important.<img src="https://photo-assets.superyachttimes.com/photo/394386/image/large-95000aca9788e63f3727ba677f1045e1.jpg" data-gid="gid://syiq/Photo/394386">“The galley layout is defined according to the capacity of the yacht, considering both guests and crew,” says Costanza Pazzi, project architect at <a data-gid="gid://syiq/Company/12" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="CRN (Company)">CRN</a>. “It is usually designed with three clearly distinct areas: washing, cooking, and preparation.”Separate traffic flows for clean and dirty dishes help prevent cross-contamination and accidents. Adequate lighting is a sometimes overlooked consideration, especially for galleys on the lower deck with smaller windows where the artificial lighting should emulate daylight temperatures (4000K-5000K) to show the true colour of the food being prepared.“Each custom superyacht galley is different,” Pazzi continues. “The spaces dedicated to galley and pantries should be discussed as part of the technical specifications at contract completion, with guidelines coming directly from the owner’s team. A fundamental requirement is that ducting and systems need to be defined in the general plans from the outset.”<img src="https://photo-assets.superyachttimes.com/photo/394417/image/large-7799ab22eb4f8b77c27d0e82de2c9dc0.jpg" data-gid="gid://syiq/Photo/394417">Experience counts“The galley is not just one room – it’s an entity,” says Brennan Dates, a chef with more than 25 years’ work experience on superyachts. Currently head chef aboard 87.6-metre <a data-gid="gid://syiq/Yacht/2354" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Project X87.6m (287'5&quot;)Golden Yachts Ltd.2022">Project X</a>, he also consults on galley design through his company <a data-gid="gid://syiq/Company/7686" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Superyacht Galley Designs (Company)">Superyacht Galley Designs</a>. His refit and new-build galley projects includes <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea85.95m (281'12&quot;)Feadship2004">Ecstasea</a>, <a data-gid="gid://syiq/Yacht/1713" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Mogambo73.51m (241'2&quot;)Nobiskrug2012">Mogambo</a>, <a data-gid="gid://syiq/Yacht/9442" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dragonfly142.0m (465'11&quot;)Lürssen Yachts2024">Dragonfly</a>, <a data-gid="gid://syiq/Yacht/10316" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Obsidian84.2m (276'3&quot;)Feadship2023">Obsidian</a>, the first <a data-gid="gid://syiq/Yacht/6409" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Moonrise99.9m (327'9&quot;)Feadship2020">Moonrise</a> and second <a data-gid="gid://syiq/Yacht/11108" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Moonrise100.7m (330'5&quot;)Feadship2025">Moonrise</a> yachts, and a 100-metre-plus vessel currently under construction.&nbsp;“Where does the food come into the boat, especially on larger yachts when you’re &nbsp;talking about shell doors and pallets of produce?” he asks. “How does the food get stored, and where is the cold storage located? Which deck is the galley on? Where are the pantries and which decks are the guests eating on? Some food is stored in the galley, then it gets prepped, possibly stored again, then gets heated or reheated, plated and served, and now you’re talking about pantry flow.” <img src="https://photo-assets.superyachttimes.com/photo/394418/image/large-c4c49eab3aaeeb1639265cfacfe9f9ee.jpg" data-gid="gid://syiq/Photo/394418">It’s also important to consider the operational profile of the yacht, because there’s a difference between a purely private yacht and one that’s going to be busy chartering. Is it going to be doing extended cruising to remote locations, which may require bigger dry stores and cold rooms?“I can walk into a galley and within five minutes know if there was a yacht chef involved in the build,” says Dates. “But no one’s really listening to chefs at this point, and I think that negatively impacts on the whole guest experience, but also the crew.”<img src="https://photo-assets.superyachttimes.com/photo/394416/image/large-f89be51556d3eb7510c568074aeb1395.jpg" data-gid="gid://syiq/Photo/394416">One thing for sure is that dumb waiters are mostly a thing of the past, with crews preferring to use the space for additional storage or fridges. Dates further warns against the use of domestic kitchen appliances on board in what are essentially commercial kitchens, where stuff tends to break down much faster. “Rational is the number one in the world for ovens, and MKN is up there,” he advises. “There’s a precipitous drop after those two.”On-deck delightsThese days, the galley is only one centre of chef action on board. There will likely be outdoor cooking stations in the build plan, particularly on charter yachts. <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a>’s <a data-gid="gid://syiq/Yacht/6424" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hadar136.0m (446'2&quot;)Lürssen Yachts2019">Hadar</a>, for example, features an extensive outdoor kitchen on the bridge deck aft, where guests can watch the chef working a wok station, a coal-powered Spanish Josper grill, a rotisserie, and pizza/teppanyaki/tandoori ovens.&nbsp;“At a bare minimum there needs to be a sink and refrigeration, just for basic sanitation,” Dates says. “If you can have a little trash compartment that’s sealed away that’s useful, and then it comes down to equipment – there’s a really good oven by MKN that fits under the counter and which takes care of its own exhaust and accepts standard 535x325 millimetre gastronomic trays.”“There is an ever-increasing demand for the inclusion of pizza ovens, particularly for yachts over 60 metres,” adds Pazzi, “There is also a trend for a table in the main galley where guests have the chance to see the chef working and enjoy a food tasting, aimed at creating a sensory experience.”&nbsp;Open-plan, country kitchen-style layouts are increasingly popular on smaller yachts, and on “galley-up” catamarans where the cooking area become an integral part of family life on board. The <a data-gid="gid://syiq/Company/374" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sanlorenzo (Company)">Sanlorenzo</a> 64Steel <a data-gid="gid://syiq/Yacht/6178" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Attila64.0m (209'12&quot;)Sanlorenzo2019">Attila</a> even has a custom-made barbecue pit inside the main deck dining area for preparing Argentinian-style steaks. <img src="https://photo-assets.superyachttimes.com/photo/394422/image/large-e484db9dd7caca3e714a505d18be3385.jpg" data-gid="gid://syiq/Photo/394422">Breathing easyAlongside cooking comes the risk of odours, which can quickly infiltrate indoor guest areas if ventilation and extraction aren’t properly designed. During the design of the second <a data-gid="gid://syiq/Yacht/11108" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Moonrise100.7m (330'5&quot;)Feadship2025">Moonrise</a>, for example, the owner requested a taller mast so galley fumes are not blown back onto the sundeck after being vented.&nbsp;&nbsp;The air extraction system in the pro-spec galley aboard the 76.6-metre explorer yacht <a data-gid="gid://syiq/Yacht/4734" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Albatross76.6m (251'4&quot;)Piriou2015">Albatross</a> highlights how smart design can maximise energy efficiency. Extractor fans typically suck the air out of a room, which has to be replaced anew with fresh, treated air. But when the outside temperature is -20°C that could mean firing up another generator just to reheat the air because the galley is in use. On <a data-gid="gid://syiq/Yacht/4734" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Albatross76.6m (251'4&quot;)Piriou2015">Albatross</a>, the cowling above the cooking hobs also creates a curtain of treated air that effectively isolates the cooking area, saving HVAC energy while containing cooking odours and maintaining a constant temperature in the galley. A similar system has been installed on the all-electric sailing yacht Project Zero.<img src="https://photo-assets.superyachttimes.com/photo/394426/image/large-b6d6a20d4c21394ec767a94b34324a08.jpg" data-gid="gid://syiq/Photo/394426">Galley design extends to the handling of waste produce, which includes both garbage and wastewater treatment. The latter is particularly pertinent, because food contaminants and grease can wreak havoc with onboard water treatment systems (this topic is specifically addressed in <a href="https://issuu.com/superyachttimes/docs/how_to_build_it_-_issue_9" rel="noopener noreferrer" target="_blank" title="">Issue 9&nbsp;</a>of How to Build It).&nbsp;“Fat, oil and grease (FOG) need to be separated – this is very important not only for the wastewater treatment process, where they can affect the biological process or clog filters, but also to prevent clogging of pipes,” confirms Georgios Kariofilis, Sales Manager at <a data-gid="gid://syiq/Company/8602" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hamann AG (Company)">Hamann</a>. “Having a grease trap and a pre-filter system is the first step to avoiding such problems.”Organic trash handling, typically resolved by storing garbage in a refrigerated room or in a deck locker, is also making advances. Dehydration plants, such as those offered by Evac and Eco-Smart, remove water content from food waste by heating it to around 80ºC and evaporating it off as steam. The sterile and odourless residual food waste is roughly 15 to 20 percent of its former volume and can be stored more easily on board for later disposal or composting. Essentially, it means you don’t need as big a trash storage room.<img src="https://photo-assets.superyachttimes.com/photo/394420/image/large-a3eda501d5fdaf6da7497de827b67522.jpg" data-gid="gid://syiq/Photo/394420">Ask an expert&nbsp;The advice from designers and chefs is basically to bring in an expert at the layout stage of design, and to argue for more space rather than less, no matter the size of yacht. Speciality companies like UK-based <a data-gid="gid://syiq/Company/2137" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="GN Espace Galley Solutions Ltd (Company)">GN Espace</a> offer expert advice for superyacht galley layouts and equipment spec, including full commercial galleys and upgrades such as adding a robust powder coated finish to stainless steel doors to match the rest of the yacht.Large or small, yacht designer Guido de Groot argues that the galley is generally in full-time use – especially on charter vessels. He compares the 10 guests plus eight crew aboard the 35-metre <a data-gid="gid://syiq/Company/2948" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Van der Valk Shipyard (Company)">Van der Valk</a> yacht <a data-gid="gid://syiq/Yacht/13018" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lalabe35.31m (115'10&quot;)Van der Valk Shipyard2025">Lalabe</a> with a 50- or 60-metre vessel that might have 12 guests and 14 crew.“It’s a similar number of guest and crew, so you can’t just halve the size of the galley on the smaller yacht,” he points out. “It requires a lot of smart thinking to get everything into a more compact space.”“Give the galley and associated areas the space they deserve,” insists Dates. “Is luxury jamming the galley in the bottom of the boat and having food travel up four decks, or is it spending resources to have the galley on the main deck nearer to where guests will eat? Because that’s what I would want.”<img src="https://photo-assets.superyachttimes.com/photo/394419/image/large-c9630b9438c0f3772c24b74a369972a1.jpg" data-gid="gid://syiq/Photo/394419">Shipyards looking to streamline the planning process with standardised solutions sometimes argue against bringing in a consultant chef at the design stage. All chefs have their own routines, preferred equipment, likes and dislikes, but individual chefs do not stay with a yacht indefinitely. The galley, on the other hand, will remain for many years, or at least until a major refit. &nbsp;“Not including a superyacht chef in the build is like building a race car and not talking to the driver because they’ll want different buttons in different places,” counters Dates. “It doesn’t make any sense to have someone who’s never done the job be the one to put it all together.”

Why superyacht galley design matters to the onboard experience

How thoughtful superyacht galley design can improve safety, service, storage, ventilation and the wider onboard dining experience.

Galley design: "It's like building a race car without talking to the driver"

Inside Baltic Yachts’ first carbon catamaran build

Inside the build of Zeteo, Baltic Yachts’ first catamaran featuring carbon construction and hybrid propulsion.

Inside the build of 33m Zeteo: Baltic Yachts’ first carbon catamaran

More than a speculative future concept, the AERA catamaran represents the convergence of mature technologies assembled with an emphasis on simplicity and sustainability. Research and testing have shown the project is both feasible and buildable. The focus now is on systems integration and production scaling.<img src="https://photo-assets.superyachttimes.com/photo/371664/image/large-bcc3594f61ee7b5986053ac54a532b0c.jpg" data-gid="gid://syiq/Photo/371664">Developed by <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a> in collaboration with sister company <a data-gid="gid://syiq/Company/458" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Rondal B.V. (Company)">Rondal</a>, <a data-gid="gid://syiq/Company/7904" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Artemis Maritime (Company)">Artemis Technologies</a>, and designer <a data-gid="gid://syiq/Company/43" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Cor D. Rover Design (Company)">Cor D Rover</a>, AERA is a technical study into the feasibility of combining wind-dominant propulsion, low-drag hydrodynamics and alternative energy systems within the constraints of a large luxury yacht.&nbsp;The 50-metre catamaran builds on the shipyard’s Project Tidal Shift, an internal innovation initiative that identified increased utilisation of sail power and systemic reductions in energy demand as the most effective pathways towards sustainability. From the outset, the project followed an engineering-first methodology in which energy demand and drag were reduced before alternative energy sources were applied. This approach informed decisions across platform selection, structural engineering, rig design and onboard energy systems.“Early concept development did not initially assume either a multihull platform or a wing sail,” says Herman de Jong, innovation manager at <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a>. “Our initial investigations focused on automation of conventional rigs and the use of delivery sails to reduce dependence on costly sail inventories.”Collaboration with <a data-gid="gid://syiq/Company/7904" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Artemis Maritime (Company)">Artemis</a> introduced the possibility of wing-based propulsion, with early consideration given to soft wing concepts derived from high-performance foiling monohulls. These were ultimately rejected due to the large structural loads required to shape the membrane, the resulting rig forces transferred to the hull, and the limited suitability for the operational profile of a superyacht. A rigid wing sail was identified as aerodynamically superior, functioning as a true air-foil with 10 times lower drag than a conventional tube mast (even with the sails lowered), while also allowing passive feathering when unloaded.<img src="https://photo-assets.superyachttimes.com/photo/371695/image/large-f6fba2ad9ba66c269310feeea6a26fee.jpg" data-gid="gid://syiq/Photo/371695">Active control“Wing sails have been proven in racing environments such as the America’s Cup and <a data-gid="gid://syiq/Company/6878" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="SailGP (Company)">SailGP</a>,” argues Dr Iain Percy, founder and CEO of <a data-gid="gid://syiq/Company/7904" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Artemis Maritime (Company)">Artemis Technologies</a>, himself an AC veteran and double Olympic champion. “The challenge here is adapting that performance into a reliable, low-maintenance system suitable for a superyacht. To do that, a significant part of the development has focused on active control to manage performance, comfort and manoeuvring across a wide range of conditions.”Initial testing of the wing concept was conducted using a free-standing, rotating carbon-fibre wing mounted on a J22 test platform. The trials confirmed the wing’s ability to passively align with the wind and maintain low drag, but also revealed some dynamic coupling between the wing’s oscillatory behaviour and the natural roll frequency of the monohull. These findings convinced the team to focus on a multihull configuration, as the increased initial stability of a catamaran minimises roll-induced excitation of the wing system and the loads on the two sets of bearings inside the yacht, although <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a> does not preclude monohull applications in the future.<img src="https://photo-assets.superyachttimes.com/photo/371647/image/large-3db5887279a6542cf289be78a33db442.jpg" data-gid="gid://syiq/Photo/371647">“The wing sail concept is better suited to a catamaran platform as the rig remains upright and is not subjected to large heel-induced load variations,” explains de Jong. “By limiting heel angles, the vessel also avoids one of the primary deterrents for owners transitioning from motor yachts to sailing yachts, not to mention the absence of flogging sails and running rigging.”The wing comprises a thin aerodynamic Mylar skin supported by a carbon-fibre framework of spars, ribs and transverse plates, which manage the global bending and torsional loads much like the wings of an airplane. Controlled flexibility is incorporated into the design to allow the wing to twist under load, improving lift distribution and reducing peak stresses. <img src="https://photo-assets.superyachttimes.com/photo/371658/image/large-87c2c4becc7abb55160fd76750f46e73.jpg" data-gid="gid://syiq/Photo/371658">AutomationAutomation is fundamental to the operational viability of the wing system. Conventional sail handling is replaced by wing rotation and deflection of the four trailing-edge flaps, actuated by hydraulic cylinders at the root of each flap. Sensor-driven software continuously adjusts the wing’s angle of attack and flap configuration in response to wind conditions, reducing crew workload and minimising the risk of human error. The control algorithms are the result of CFD models developed in collaboration with Artemis, drawing on experience from high-performance sailing applications.&nbsp;Feathering is a critical safety feature, so if the active system fails the wing naturally aligns with the wind and minimises drag. In extreme or turbulent conditions, it is designed to depower automatically to a low-load, low-drag state without requiring crew intervention. Although it’s designed to remain upright in all weather conditions, a hydraulic hinge mechanism allows the entire wing to be lowered to reduce air draught for bridge clearance or maintenance purposes. <img src="https://photo-assets.superyachttimes.com/photo/393334/image/large-cbf9c3c68a163712f4ddc521e251b194.png" data-gid="gid://syiq/Photo/393334">From a lifecycle standpoint, Dr Percy points out that a wing sail replaces a consumable system with a permanent one. Conventional sails degrade and require regular replacement, whereas a properly designed wing can last for the life of the yacht. This permanence shifts cost and maintenance considerations away from periodic sail replacement towards upfront engineering and long-term reliability.“Manufacturing feasibility has also been a central consideration throughout development,” says Bart van der Meer, sailing system engineer at <a data-gid="gid://syiq/Company/458" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Rondal B.V. (Company)">Rondal</a>. “Each rib of the wing requires a unique mould due to the changing airfoil geometry along the span. We expect production-scale moulds are expected to be fabricated from milled aluminium to ensure dimensional accuracy and repeatability.”Although these challenges are not trivial, they are a question of process optimisation rather than unresolved technical risk.<img src="https://photo-assets.superyachttimes.com/photo/393329/image/large-e0fb3f469c6062ee583c2c1998445a5c.jpg" data-gid="gid://syiq/Photo/393329">Built like a bridgeStructurally, the AERA catamaran departs from conventional multihull architecture through the use of principles derived from cantilevered bridge design – notably the historic Koningshaven Bridge (also known as ‘De Hef’) close to <a data-gid="gid://syiq/Company/43" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Cor D. Rover Design (Company)">Cor D Rover</a>’s studio in Rotterdam. The triangulated geometry spans large distances between pillars, enabling open-plan interiors and extensive glazing without visually dominant pillars.&nbsp;The asymmetrical geometry of the vessel is a functional response to spatial and structural requirements rather than an aesthetic gesture. Although the deck levels appear unsupported, structural integrity is maintained through clearly defined global load paths disguised in features such as staircases. <img src="https://photo-assets.superyachttimes.com/photo/371698/image/large-b28b9a6de23b265903ea61bfe20d603d.png" data-gid="gid://syiq/Photo/371698">“The geometry follows the forces rather than being applied as a stylistic layer,” explains <a data-gid="gid://syiq/Company/43" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Cor D. Rover Design (Company)">Cor D Rover</a>. “Structural cut-outs allow semi-open areas to remain outside the tonnage calculations while still contributing to stiffness and spatial articulation. Despite this unconventional arrangement, the enclosed volume is carefully controlled at approximately 1,880 cubic metres, keeping the vessel below the 500 GT threshold.”Material selection for the hull and superstructure is centred on aluminium, chosen for its strength-to-weight ratio, recyclability, and compatibility with <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a>’s expertise in working with lightweight aluminium alloys. Weight control is particularly critical for a catamaran, as increased mass directly raises wetted surface area and drag. <a data-gid="gid://syiq/Company/7904" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Artemis Maritime (Company)">Artemis Technologies</a> was closely involved in optimising the hull forms to balance hydrodynamic efficiency with superyacht functionality.“Our naval architects actually found the constraints of the superyacht design space to be a valuable tool in refining the hull shapes,” says Dr Percy. “By working within a predefined functional window that takes into account accommodation needs, utilities and other essential factors, they were able to focus on local optimisation and maximise the efficiency of the hull design.”<img src="https://photo-assets.superyachttimes.com/photo/393335/image/large-11dc06fc86174d979606f874bfc85d4a.png" data-gid="gid://syiq/Photo/393335">Energy generationEquipped with two retractable, forward-facing, azimuthing thrusters, AERA’s energy generation is organised around a hybrid diesel-electric architecture and 580-kWh battery bank for efficient integration of multiple power sources. <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a> installed a similar system on 60-metre <a data-gid="gid://syiq/Yacht/8258" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sarissa59.7m (195'10&quot;)Royal Huisman2023">Sarissa</a> in 2023, but on AERA has added compressed hydrogen tanks for supplying a low-temperature PEM hydrogen fuel cell. With Approval in Principle from Lloyd’s Register, the system is designed to provide approximately 72 hours of silent hotel-load operation.As with <a data-gid="gid://syiq/Yacht/8258" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sarissa59.7m (195'10&quot;)Royal Huisman2023">Sarissa</a>, hydrogeneration plays a primary role during sailing with under-hull generators optimised for operating speeds between 11 and 12 knots. At these speeds, continuous power output of around 40 kW is achievable, sufficient to cover hotel loads and allow generators to remain offline. The fixed, low-drag hydrogenerators deliver optimal performance without the added complexity of retraction mechanisms – a solution that aligns with AERA’s ethos of simplicity and high efficiency.<img src="https://photo-assets.superyachttimes.com/photo/393328/image/large-15f017ba3b5bb5892a3a52ed2dc5ad1c.jpg" data-gid="gid://syiq/Photo/393328">“Our simulations show that during a typical cruising week, including one visit shoreside when shore power is available, the yacht will not need to run her variable-speed gensets for hotel loads,” says Jidde Looijenga, innovation manager at <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a>. “They are needed only during motoring or motor sailing to generate electricity for the retractable propulsion system. Naturally, they can also run on HVO for substantial reductions in CO₂ and Nox emissions.”Together with <a data-gid="gid://syiq/Company/43" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Cor D. Rover Design (Company)">Cor D Rover</a>, the shipyard team is exploring the integration of wind turbines to generate electrical power at anchor or in port. Any such system would be supplementary rather than critical and, as the designer notes, “would need to operate with very low noise and vibration to be acceptable in a yacht environment.” These ideas are not on the project’s critical path, but they illustrate potential future extensions of <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a>’s renewable energy strategy.<img src="https://photo-assets.superyachttimes.com/photo/393332/image/large-3aaca815d143ace4293d0ef4519ca552.png" data-gid="gid://syiq/Photo/393332">UsabilityBeyond technical feasibility, the AERA concept also addresses usability and the owner experience. The combination of automation, reduced manual sail handling, and increased comfort is intended to make sailing more accessible and as straightforward as operating a motor yacht.&nbsp;“Combined with reduced fuel consumption and lower operational emissions, this positions AERA as a bridge between motor and sailing yacht ownership,” says Looijenga.Overall, the catamaran represents a convergence of proven technologies and disciplined system integration rather than reliance on untested innovations. With its emphasis on simplicity, sustainability and lifecycle efficiency, the concept demonstrates that a wind-dominant, low-emission superyacht is technically achievable within available engineering and classification frameworks.<img src="https://photo-assets.superyachttimes.com/photo/371693/image/large-d494cdf4de75a63242521821d563f54f.png" data-gid="gid://syiq/Photo/371693">

Royal Huisman AERA catamaran

Royal Huisman's 50m hydrodynamic luxury yacht 

AERA catamaran: The wind-dominant, low-emission sailing superyacht

Starting out as a captain, Simon Finlayson quickly found himself drawn into the mechanics of new-build decision-making – first as a build captain, then as an owner’s representative. Recognising the value of understanding how yachts are built from the inside out, he moved into the yards, working within both project management and production team, to close the knowledge gap between owner expectations and shipyard execution.<img src="https://photo-assets.superyachttimes.com/photo/390228/image/large-d82f02d6f20048f162b3e9f36ff01c3a.jpg" data-gid="gid://syiq/Photo/390228">You’ve worked across both sailing and motor yachts. What’s the biggest practical difference from a build perspective? A sailing yacht spends much of its life heeled over, while a motor yacht generally operates upright but rolls. That single reality drives countless knock-on decisions. Something as basic as getting suppliers to confirm their equipment will operate at heel sounds simple, but it’s a major consideration that can be overlooked until late in the process. Beyond that, industry culture differs. Sailing yacht teams often have more human connection and personal involvement in material choices and how the boat comes together. Motor yacht projects, especially at the larger end, tend to be more contract-led – lines are more clearly defined, and communication can become more formal and legalistic.<img src="https://photo-assets.superyachttimes.com/photo/372358/image/large-f8a547ead4e5dc9366a98d8c53b3ebb5.jpg" data-gid="gid://syiq/Photo/372358">Where do sailing yacht builds demand the most attention during construction? Construction and engineering discipline – particularly strength versus weight and load management. Sailing yachts face more dynamic load cases than motor yachts. Rig, structure, deck gear, and load paths have to be correct because the forces are very real and move around the boat depending on sail plan and conditions. Then there’s the constant balancing act between complexity, available space, and operational simplicity. You can specify incredible technology, but someone has to operate it while also sailing the yacht. It’s very easy to spiral into systems that are elegant on paper yet impractical at sea.You mentioned technology can become a “rabbit hole”. What does that mean in practice? It often starts with good intentions: more automation, more integration, more capability. Engineers are focused specialists and can build something technically impressive. But if the operational interface becomes too complex, the crew won’t embrace it, faults become harder to diagnose, and the yacht ends up carrying systems that don’t truly help. The challenge is finding a workable middle ground – systems that deliver performance without turning routine operation into an engineering exercise.<img src="https://photo-assets.superyachttimes.com/photo/106261/image/large-8723f43ab69bd20d62467c9657646233.jpg" data-gid="gid://syiq/Photo/106261">You’ve been brought into projects to assist with re-aligning goals and expectations. What’s your go-to framework for getting control quickly? I try to keep it simple and scaleable: what did you say you would do, what are you doing now, and does that still fit our expectations?’ Then keep looping that conversation until everyone agrees on what “done” looks like. It’s mostly expectation management – but grounded in facts, not opinions.How do you bring shipyard processes into sync with specialist contractors and designers? By respecting expertise. If I come to you for doors, it’s because you’re the best at doors – you should advise how to solve the problem. Shipyards can sometimes push a “we always do it like this” approach, but many suppliers have good reasons for their preferred methods. In the Netherlands especially, you see deep specialisation. The industry is successful because experts can operate within a niche at the top end of their field. The best outcomes come when you give that expertise space, listen, acknowledge it, and then clearly define demarcation and deliverables.<img src="https://photo-assets.superyachttimes.com/photo/185959/image/large-e9814fcc0864c8409951eb957946f58b.jpg" data-gid="gid://syiq/Photo/185959">Where do schedules most commonly come under pressure on new builds? There are typically two pinch points. First is the start of construction. Different yards approach engineering and production differently. Some “engineer, then build”, while others start building early to protect the programme. Either way, you need clear decision gates – moments to say, “we know enough to proceed,” or equally, “we don’t know enough yet, so stopping now prevents rework later.”Then there is finishing and acceptance. Getting from a dynamic production environment to a finished, accepted space or system requires a high level of coordination. Someone has to confirm it is correct – yard-side or owner-side – and that acceptance can &nbsp;proceed based on facts rather than opinions. It requires checking, testing, cleaning, close-out, and a shared understanding of what remains outstanding. It’s easy to reach the end of hours or budget and declare, “it’s done.” In reality, that’s often the start of the hard part: delivering something that can be signed off with confidence.<img src="https://photo-assets.superyachttimes.com/photo/367902/image/large-6b292765f8464aaae3fe8b1c81e49d1e.jpg" data-gid="gid://syiq/Photo/367902">Change orders can lead to major timeline extensions. Can they be prevented? Not always. The first question is whether the change is driven by necessity or desire. Sometimes change is essential for safety, practicality, compliance, or evolving technology. The key is catching it early enough to minimise impact, and that brings us back to the one tool that matters at every level: the specification. Every conversation – with the owner’s team, suppliers, and within the yard – should orbit the spec. The moment you realise you’re discussing something that wasn’t agreed, you stop and reset: why are we talking about this change, what decision is required, and how do we proceed? If you lose the spec, you lose control.&nbsp;What technical trends are most likely to influence yacht building over the next decade? Propulsion and energy architecture will determine the technological backbone of future yachts. Moving toward battery-driven propulsion and DC-based electrical systems rather than traditional AC isn’t a bolt-on change – it affects the entire vessel. It requires a shift in engineering knowledge, build experience, and operational capability. You can design these systems, but they must be simple enough for the crew to operate. If nobody can operate it, you can’t build it – at least not responsibly.Another major theme is materials availability, with teak decks becoming a particularly visible battleground. It’s not only about sourcing; it’s about persuading stakeholders to rethink what a “proper” deck should look and feel like. The industry is, by nature, building the future using the past. That’s powerful, but it can also trap you in familiar solutions when the best answer is changing.<img src="https://photo-assets.superyachttimes.com/photo/113629/image/large-ebbb6667281aa6927f85947a0a313e82.jpg" data-gid="gid://syiq/Photo/113629">You’ve been involved in some standout yachts. Which projects most shaped your approach as a project manager? <a data-gid="gid://syiq/Yacht/4241" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Wisp47.65m (156'4&quot;)Royal Huisman2014">Wisp</a> was a pivotal learning curve – a classic sailing yacht build that showed me how much I still didn’t know about shipyard reality, even when deeply involved on site. Later, working inside a shipyard environment at De Vries on major deliveries such as Moonrise and Bliss accelerated my understanding of just how complex coordination can be.The real benchmark for me, though, has been the <a data-gid="gid://syiq/Yacht/6409" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Moonrise99.9m (327'9&quot;)Feadship2020">Moonrise</a> programme, because I experienced it from both sides – first for the shipyard and then within the owner’s team on the subsequent project, <a data-gid="gid://syiq/Yacht/11108" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Moonrise100.7m (330'5&quot;)Feadship2025">Moonrise II</a>. That provided a complete view of how decisions, quality control, documentation, and delivery pressures differ depending on where you sit.When design intent is clear and the drive for quality is genuinely high, you get something rare: a yacht where you walk through and everything feels right – layout, flow, system logic, and finish. Being part of that elevates your own performance and sets a standard you try to carry into every other project.

Simon Finlayson on successful yacht building

Simon Finlayson shares expert insights on successful yacht building, from design and engineering to managing expectations and delivery.

Inside Angle: Simon Finlayson on navigating the mechanics of yacht builds

<a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a>, the Netherlands-based synthetic decking specialist, has been serving the superyacht industry since the 1990s. Over that time it has witnessed shifts in materials, expectations and regulations, including the EU’s 2021 ban on old-growth teak from Myanmar, which have encouraged owners and shipyards to seek out high-performance alternatives. Fresh from completing one of its most technically demanding projects to date, <a data-gid="gid://syiq/Company/64" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Oceanco (Company)">Oceanco’s</a> 111-metre <a data-gid="gid://syiq/Yacht/10354" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Leviathan111.0m (364'2&quot;)Oceanco2025">Leviathan</a>, <a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a> CEO Rientz Willem Bol discusses the company’s recent acquisitions, material R&amp;D, and long-term strategy.<img src="https://photo-assets.superyachttimes.com/photo/389541/image/large-1834f21cd3fcb472d40fd788c16611fc.jpg" data-gid="gid://syiq/Photo/389541">Last year, you acquired Nautifit in The Netherlands and Boteka in Florida. What was the rationale behind this?By bringing Nautifit into <a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a>, we increase customer value and expand our prefabrication capacity in Europe. This accelerates the development of new prefab applications and makes us faster, sharper and more creative in what we can offer our clients.Boteka has been a trusted partner of ours in the cruise ship sector for more than 14 years. The acquisition was driven by two key objectives. First, vertical integration. By bringing Boteka fully into the <a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a> organisation, we can keep everything we produce under one roof. Second, geographic reach. Having a strong base in the US allows us to operate across multiple continents and serve the global market with the same consistent standards.<img src="https://photo-assets.superyachttimes.com/photo/374242/image/large-4f6cb53c5b0b2f91e00245841dcc6a16.jpg" data-gid="gid://syiq/Photo/374242">What made&nbsp;<a data-gid="gid://syiq/Yacht/10354" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Leviathan111.0m (364'2&quot;)Oceanco2025">Leviathan</a>&nbsp;such a complex project for&nbsp;<a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a>?What made this project unique was the close collaboration between the owner’s team, <a data-gid="gid://syiq/Company/64" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Oceanco (Company)">Oceanco</a>, and <a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a> throughout the design phase and execution. Compared to the scale of some of the cruise ship decking we’ve worked on, <a data-gid="gid://syiq/Yacht/10354" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Leviathan111.0m (364'2&quot;)Oceanco2025">Leviathan</a> is actually quite small. We were working with just a few thousand square metres compared to 10-20,000-square-metres on some of our larger projects. However, the time investment was comparable. This is because of the level of complexity and detail it required. We were working to an inspection tolerance of just 1.5 millimetres over three-metres – an unprecedented level of flatness and consistency for a yacht of this size. Achieving this meant deploying up to 16 highly skilled specialists on the project. Material choice added another layer of difficulty. The design required a blue pigment, which is among the most challenging colours to stabilise in resin-based systems. In many ways, we weren’t simply delivering a deck – we were realising a design object in its own right. <img src="https://photo-assets.superyachttimes.com/photo/374254/image/large-dd7155f66c665783416d641846d8d349.jpg" data-gid="gid://syiq/Photo/374254">How is R&amp;D currently shaping the development of synthetic decking?UV resistance is a major focus. Owners expect colour stability over many years, even with constant exposure in extreme climates, so improving long-term performance under UV load is critical. We’ve also developed so-called “cool pigments” and techniques to reduce surface temperature, making decks more comfortable to walk on in hot regions. We can now embed functional lighting directly into the deck. One example is helicopter landing areas: using gyroscopically informed lighting, the system changes colour in response to vessel movement, giving pilots immediate visual feedback on whether conditions are safe to land. This technology originated from our work on naval frigates, where safety requirements are uncompromising. Beyond materials, we are becoming much more data-driven as a company. By integrating sensors into decks, we can analyse how people move and behave onboard, allowing us to optimise functionality and safety.<img src="https://photo-assets.superyachttimes.com/photo/374247/image/large-6da0558a1b1f317874e656c98e57635a.jpg" data-gid="gid://syiq/Photo/374247"> We still see a lot more teak decks on new builds than synthetic ones and it appears that, outside of technical areas, owners still want wood. What are your thoughts on this?&nbsp;We do see a shift in mindset, but we’re in a transition phase. When something old and familiar comes under pressure or begins to disappear, people initially look for something that comes as close as possible. Designers and owners often fall back on materials that reference familiar imagery and heritage, driven by aesthetics and emotion. In that search, choices are frequently made based on visual similarity, even if that means compromising on performance or longevity. That tendency usually persists until real-world use reveals that these materials age differently from the original, for example, by degrading more quickly or lacking essential properties such as wear resistance, or resistance to porosity and water absorption. At that point, the question shifts away from what looks similar, towards materials that not only feel right aesthetically, but also perform demonstrably in practice.<img src="https://photo-assets.superyachttimes.com/photo/378026/image/large-e1d52fec9f5b48e54ce4354cd6459c91.jpg" data-gid="gid://syiq/Photo/378026"> As CEO, how do you see the future of&nbsp;<a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a>?The COVID period pushed many businesses into short-term, crisis-driven thinking and disrupted the relationship-building that normally underpins innovation. Now, in 2026, we can once again focus on long-term strategy. My focus is on innovation and striving to have a continuous process. At <a data-gid="gid://syiq/Company/7672" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bolidt (Company)">Bolidt</a>, that means an extended horizon and we talk about thinking 500 years ahead – not because it’s literally achievable, but because it shapes how we make decisions today. That mindset encourages durability, adaptability and responsibility in everything we develop.Finally, we are very excited about showing people all the innovative things we can achieve as a company and so we’ve built a two-storey Experience Centre of 4,000-square-metres where architects, designers, and industry professionals can see what’s technically possible. We’re keen to actively challenge the industry’s thinking and we want people to engage, question assumptions, and reimagine what’s possible with decking.

Rientz Willem Bol Bolidt CEO

Georgia Tindale sits down with Bolidt CEO Rientz Willem Bol to discuss about the synthetic decking specialist projects and future plans.

CEO in Conversation: Rientz Willem Bol of Bolidt

Which cities can truly claim that their ports are as old as the cities themselves? Hamburg is one of the few. Its maritime heritage permeates every corner, thanks in large part to Hermann Blohm and Ernst Voss.<img src="https://photo-assets.superyachttimes.com/photo/388030/image/large-2b7a5af8e354717e8822a2c8e928c86f.jpg" data-gid="gid://syiq/Photo/388030">The two German entrepreneurs, whose names still proudly brandish the shiplifts that define Hamburg’s skyline, founded <a data-gid="gid://syiq/Company/3" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Blohm & Voss GmbH (Company)">Blohm &amp; Voss</a> in 1877. They chose the island of Steinwerder to establish what would become a 451,000-square-metre shipbuilding operation – roughly the size of the Vatican City. Initially focused on ship repair, <a data-gid="gid://syiq/Company/3" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Blohm & Voss GmbH (Company)">Blohm &amp; Voss</a> prepared commercial ships for the Atlantic passages before the company started building its own vessels. Today, Steinwerder operates under the custodianship of <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a> and has returned to its core principles: refit and repair.Specialising in complex refit programmes for private yachts, <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a> Werft Hamburg has maintained Steinwerder’s legacy of being one of the world’s most trusted ports of call for refits. The yard also continues Hamburg’s tradition as a free-flowing hub of maritime knowledge, where expertise is shared across teams, suppliers, and partners.&nbsp;This open-source approach to expertise gives the crew a unique opportunity to learn directly from the wider supply network. When suppliers and technical partners converge in one place, crew gain insight into often-overlooked nuances, ensuring optimal understanding for vessel longevity. Training is regular, problems are solved collaboratively, and the collective intelligence of Hamburg’s maritime ecosystem is fully accessible. The city itself – just a road tunnel away from the shipyard – offers cultural events, international dining, and green spaces along the Elbe, rather than an isolated shipyard town."An effective yacht refit or repair does not necessarily require a shipyard appointment," says York Ilgner, Managing Director of <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a> Werft Hamburg. "Smaller details can often be addressed at sea, at anchor, or at layberth with the right knowledge. As part of our service, we aim to impart as much expertise as possible so the crew can operate self-sufficiently. Our phones, of course, remain open when additional support is needed."Informal networks, however valuable, can be fragile when reliant on chance encounters or individual relationships. To address this, <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a> has formalised initiatives such as its annual Chief’s Day. The second edition, held recently in Hamburg, brought together more than 80 chief engineers, suppliers, partners, and management teams for a day of technical exchange. From innovations in stabilisation systems to advances in propulsion efficiency, the event brought forward many voices too often absent from strategic conversations. <img src="https://photo-assets.superyachttimes.com/photo/388029/image/large-3c5dccff002b180b0640f9c5554baf40.jpg" data-gid="gid://syiq/Photo/388029">Over the course of the day, one theme surfaced repeatedly: institutional memory. The big question is just how much data should be recorded, and what benefits this brings to ensure seamless maintenance. Which metrics truly predict issues before they escalate? How can maintenance histories transfer between teams without overwhelming them? The difference between a reactive refit and a strategic one often lies in whether previous lessons are learned or lost.Shipbuilding has shaped the identity of Hamburg for more than eight centuries, and <a data-gid="gid://syiq/Company/23" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Lürssen Yachts (Company)">Lürssen</a> sustains its culture of maritime excellence. This culture develops through exchange, one conversation at a time. Hamburg remains what it has always been: a place where ships are built and repaired, and where the knowledge to do both better continues to evolve.

Inside Hamburg’s Steinwerder Shipyard: How Lürssen Continues the Blohm & Voss Refit Legacy

Hamburg's maritime heritage: How Lürssen keeps the Blohm & Voss legacy alive at Steinwerder Shipyard. 

Inside Hamburg’s Steinwerder Shipyard: How Lürssen continues the Blohm & Voss Refit legacy

The tenth issue of <a href="https://issuu.com/superyachttimes/docs/how_to_build_it_-_issue_10_-_spring_2026" rel="noopener noreferrer" target="_blank" title="">How to Build It</a> is here! This issue explores topics and projects that reflect how the convergence of advanced technology, heritage principles, and environmental awareness is reshaping both the yachts themselves and the processes used to design and build them.<img src="https://photo-assets.superyachttimes.com/photo/387548/image/large-029e53859de81586e629f1840d8f4047.jpg" data-gid="gid://syiq/Photo/387548">This feature includes the 45-metre motor yacht designed by <a data-gid="gid://syiq/Company/33" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Hoek Design Naval Architects B.V. (Company)">Hoek Design</a> under construction at the family-owned <a data-gid="gid://syiq/Company/40" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Hakvoort Shipyard (Company)">Royal Hakvoort Shipyard</a>. A long-range cruiser that exemplifies the balance between timeless aesthetics and modern performance.&nbsp;Also in this issue is the Aera catamaran concept by <a data-gid="gid://syiq/Company/122" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Royal Huisman (Company)">Royal Huisman</a>, which harnesses that most ancient source of renewable energy – the wind – with a free-standing wing sail, adding a hybrid diesel-electric architecture and hydrogeneration system for good measure.<img src="https://photo-assets.superyachttimes.com/photo/387543/image/large-9f2722fe5c8266cbf5120e633ac632ee.jpg" data-gid="gid://syiq/Photo/387543">Another notable multihull project, the Baltic 107 currently in build, presents a fresh challenge for the Finnish shipyard known for its lightweight, high-performance monohulls.Furthermore, <a href="https://issuu.com/superyachttimes/docs/how_to_build_it_-_issue_10_-_spring_2026" rel="noopener noreferrer" target="_blank" title="">issue 10</a> dives into 'digital twinning', a game-changing tech originating from NASA's space programmes, as well as taking a look at nuclear propulsion and how modern advances mean nuclear-powered superyachts might be just around the corner.<img src="https://photo-assets.superyachttimes.com/photo/387546/image/large-34fd7eebb5154afa9080ef9c4e10db41.jpg" data-gid="gid://syiq/Photo/387546">No matter how advanced the tech, the essence of a yacht remains the experience it offers its guests. With this in mind, we deep dive into the ins and outs of galley design, where culinary creativity meets rational functionality. All that and more, explored in <a href="https://issuu.com/superyachttimes/docs/how_to_build_it_-_issue_10_-_spring_2026" rel="noopener noreferrer" target="_blank" title="">issue 10</a>!<img src="https://photo-assets.superyachttimes.com/photo/387545/image/large-da7666c37919def80837be721ffc02f4.jpg" data-gid="gid://syiq/Photo/387545">

How To Build It - Issue 10: Technology, Tradition and Transformation

How To Build It - Issue 10: Technology, Tradition and Transformation in the superyacht industry

How To Build It - Issue 10: Technology, tradition and transformation in the superyacht industry

Onboard Numarine's 40MXP video

We stepped aboard Mitan, the latest Numarine 40MXP in Palm Beach.

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Video: Step aboard Numarine's new flagship, the 40MXP Mitan

<a data-gid="gid://syiq/Company/112" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line (Company)">Custom Line</a> has announced the launch of the first 34.5-metre <a data-gid="gid://syiq/Yacht/14712" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line Navetta 35/0134.5m (113'2&quot;)Custom Line2026">Custom Line Navetta 35</a> yacht from the <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti Group</a> Superyacht Yard in Ancona, Italy. <img src="https://photo-assets.superyachttimes.com/photo/396958/image/large-5e7320ad24519c237c36a53098354f77.jpg" data-gid="gid://syiq/Photo/396958">Launched as the first hull in the series, her sale was announced in February 2026 and was described as an evolution of the yard’s Navetta series, with a strong emphasis on natural light and onboard comfort.<img src="https://photo-assets.superyachttimes.com/photo/396965/image/large-f591300f74ebc39eedd4b608a54aafad.jpg" data-gid="gid://syiq/Photo/396965">Positioned alongside her larger sistership, the <a data-gid="gid://syiq/Yacht/14712" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line Navetta 35/0134.5m (113'2&quot;)Custom Line2026">Navetta 35</a> yacht adopts the same core design language, defined by clean architectural forms. She features exterior design by <a data-gid="gid://syiq/Company/5547" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Filippo Salvetti (Company)">Filippo Salvetti</a>, with interior design courtesy of <a data-gid="gid://syiq/Company/5082" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Antonio Citterio Patricia Viel (Company)">Antonio Citterio Patricia Viel ACPV Architects</a>.<img src="https://photo-assets.superyachttimes.com/photo/396962/image/large-617932259e73d86b11853e427c103d6c.jpg" data-gid="gid://syiq/Photo/396962">According to the <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti Group</a>, she features almost transparent naval architecture, which puts the sea at the centre of the onboard experience. The result is a fluid interconnection between her interior and exterior spaces, creating a sense of pleasure, elegance and comfort. <img src="https://photo-assets.superyachttimes.com/photo/396961/image/large-0a092e8dc97dc3153475abfe97a6c724.jpg" data-gid="gid://syiq/Photo/396961">The made-to-measure yacht boasts a beam of 7.7 metres, with her layout spanning over three decks. Defined by a contemporary exterior design and dynamic silhouette, she showcases clean lines and sculptural surfaces.<img src="https://photo-assets.superyachttimes.com/photo/396969/image/large-fe622ffb38debd908229c092316cd7b0.jpg" data-gid="gid://syiq/Photo/396969">Moving inside, her design language soft volumes, organic geometries and custom-made freestanding furniture designed by Antonio Citterio. <a data-gid="gid://syiq/Company/5082" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Antonio Citterio Patricia Viel (Company)">ACPV Architects</a> also developed a Light Mood based on the owner’s wishes, blending ivory, beige and caramel colourways that run throughout to create more depth, luminosity and lightness.<img src="https://photo-assets.superyachttimes.com/photo/396971/image/large-c650afb8a72cefaf8e5423baa63cb41f.jpg" data-gid="gid://syiq/Photo/396971">A plethora of materials have been used onboard including vibrant Pietra di Vicenza stone, pale wood floors and sand-coloured leather used for upholstery and detailing to create a warm and refined atmosphere.<img src="https://photo-assets.superyachttimes.com/photo/396968/image/large-589c2327e3af86ff0ec7f9f12976d9a2.jpg" data-gid="gid://syiq/Photo/396968">The <a data-gid="gid://syiq/Yacht/14712" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line Navetta 35/0134.5m (113'2&quot;)Custom Line2026">Custom Line Navetta 35</a> yacht can accommodate up to 10 guests across a five stateroom configuration, with her full-beam owner’s suite positioned forward on the main deck. This private suite includes separate his-and-hers bathrooms connected by a shared central shower.On the lower deck, four guest staterooms are accessed via a dedicated lobby, including one suite fitted with a Pullman berth to accommodate additional guests.<img src="https://photo-assets.superyachttimes.com/photo/396967/image/large-daf41f6c8e4667a26d0c94a5c2da5280.jpg" data-gid="gid://syiq/Photo/396967">A distinct feature in her exterior design is the notch in her gunwale, which aims to reduce the perceived mass of her superstructure, and allow for an increase of natural light to her interior spaces, creating an overall more streamlined profile and a further sense of openness.<img src="https://photo-assets.superyachttimes.com/photo/396959/image/large-11aefd747e74b0e1b138c75019a77552.jpg" data-gid="gid://syiq/Photo/396959">With over 300 square-metres of indoor and outdoor space, her flybridge deck stands out thanks to the removal of her staircases for a wider, more versatile deck arrangement. The deck includes a Jacuzzi and expansive lounging areas, while forward freestanding furniture and a sunset lounge area offer unobstructed panoramic views.<img src="https://photo-assets.superyachttimes.com/photo/396966/image/large-fd63e11f2451c5ecbd08c2c0bee0bfbb.jpg" data-gid="gid://syiq/Photo/396966">Her sundeck features an open-air sea view pool, while covered areas provide shade and protection, ensuring usability in a range of conditions. On the main deck aft, a lounge area provides direct access to the beach club.<img src="https://photo-assets.superyachttimes.com/photo/396970/image/large-51cbdc442951e7cf1dbc94e3b2a79f09.jpg" data-gid="gid://syiq/Photo/396970">In terms of performance, the standard <a data-gid="gid://syiq/Yacht/14712" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line Navetta 35/0134.5m (113'2&quot;)Custom Line2026">Navetta 35</a> yacht is powered by twin <a data-gid="gid://syiq/Company/1441" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MAN (Company)">MAN</a> V12 1,400 horsepower engines, providing her with a top speed of 15 knots and a cruising speed of 12 knots. She can also reach a range of 1,750 nautical miles at an economic cruising speed of 10 knots. There is also an option to install twin Caterpillar C32 1,622 horsepower engines, which would propel the Navetta 35 yacht to a top speed of 16 knots.The second and third hulls are currently sold and already in-build, with a delivery date of 2027.

Custom Line Navetta 35: First yacht launched

Custom Line has announced the launch of the first 34.5-metre Custom Line Navetta 35 yacht from the Ferretti Group Superyacht Yard in Ancona, Italy. 

First Custom Line Navetta 35 yacht launched

Italian yacht builder <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> has announced that the KKCG owned shareholder Azúr a.s. has initiated legal proceedings challenging the appointment of the new board of directors at the company's shareholders' meeting on 14 May 2026.<img src="https://photo-assets.superyachttimes.com/photo/394210/image/large-3bfd53739fbb59d4d9e5f0968bf4da9e.jpg" data-gid="gid://syiq/Photo/394210">According to a statement released by <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> on 11 June, Azúr filed a writ of summons before the Court of Bologna on 9 June 2026 pursuant to Articles 2377 and 2378 of the Italian Civil Code.Azúr a.s. is a wholly owned part of KKCG’s global business, founded by Czech entrepreneur Karel Komárek. They bring together all of KKCG Maritime’s assets into a single entity and currently have a 23.23 percent stake in the <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti Group</a>.&nbsp;Azúr is currently seeking nullity and/or annulment of resolutions concerning the appointment of <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a>'s new board of directors, the determination of the number of board members and the appointment of the company's board of statutory auditors.They have also requested interim relief from the court to suspend the effectiveness of those resolutions pending the outcome of the proceedings. <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> have responded stating that they will take the necessary steps to defend its position.&nbsp;“<a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a>, having taken note of the service of the writ of summons, will protect its rights and will seek appropriate legal advice to defend and will have the absolute correctness of its conduct ascertained before the competent Court.”<a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> confirmed that its corporate bodies remain fully operational and continue to perform their respective duties and responsibilities. They also added that these legal proceedings have no impact on its business operations, customer relationships, commercial activities or strategic projects.The <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti Group</a> officially announced the appointment of Stassi Anastassov as its new Chief Executive Officer with immediate effect, following the company’s Annual General Meeting held on 15 May 2026.Read more:&nbsp;<a data-gid="gid://syiq/Article/66099" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group appoints Stassi Anastassov as CEO amid ownership tensions (2026-05-15 16:30:00 +0200)">Ferretti Group appoints Stassi Anastassov as CEO amid ownership tensions</a><img src="https://photo-assets.superyachttimes.com/photo/386471/image/large-5864e3d980f30348ec76855095f57666.jpg" data-gid="gid://syiq/Photo/386471">The appointment was confirmed by the Board of Directors, which also reconfirmed Tan Ning as Chairman of the Board and the departure of Alberto Galassi. On 15 May, KKCG Maritime submitted a request to the Italian government to assess whether <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> had breached "golden power" rules designed to shield strategic assets.The matter will now be considered by the Court of Bologna, with <a data-gid="gid://syiq/Company/4876" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ferretti Group (Company)">Ferretti</a> stating that it will keep shareholders informed of any material developments in accordance with applicable laws and regulations.

KKCG Maritime challenges Ferretti Group board appointments in court

Ferretti has announced that the KKCG owned shareholder Azúr has initiated legal proceedings challenging the appointment of the new board of directors.

Ferretti shareholder KKCG Maritime challenges board appointments in court

<a data-gid="gid://syiq/Company/102" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Mulder Design (Company)">Mulder Design</a> has unveiled the first details of the 60-metre superyacht concept Apex. Designed in-house by the Dutch studio, the motor yacht has been conceived around a performance-oriented brief.<img src="https://photo-assets.superyachttimes.com/photo/396926/image/large-419221d207de5e8d99df4c3ee8096ce5.jpg" data-gid="gid://syiq/Photo/396926">Apex features naval architecture and exterior styling by <a data-gid="gid://syiq/Company/102" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Mulder Design (Company)">Mulder Design</a>, which have opted for a lightweight aluminium hull and superstructure. She showcases a clean and highly geometric exterior design, with extensive glazing spanning her sleek silhouette.At the core of the design lies the <a data-gid="gid://syiq/Company/102" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Mulder Design (Company)">Mulder Design</a> High Speed Cruising hull form, which has been engineered to deliver efficient performance across a wide operational profile. The advanced hull platform of Apex&nbsp;operates comfortably and efficiently from economical transoceanic passages to high-speed cruising.<img src="https://photo-assets.superyachttimes.com/photo/396927/image/large-c596a59bc5ef08f7d483435fc198b0fa.jpg" data-gid="gid://syiq/Photo/396927">With a beam of 10.7 metres, Apex can comfortably accommodate up to 12 guests, as well as a crew of 14 for a high level of service and comfort. Her interior design can also be fully tailored to suit the wishes of her owner.&nbsp;Apex displays balanced expansive deck volumes, with her aft deck maximised to create a social platform for guests onboard. The first renderings show a large alfresco lounge area at her bow, offering the perfect space for guests to entertain or relax.&nbsp;In terms of performance, Apex is powered by twin <a data-gid="gid://syiq/Company/1409" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MTU (Company)">MTU</a> engines, providing her with a top speed of 28 knots, a cruising speed of 22 knots and a range of 4,500 nautical miles at 13 knots.&nbsp;

Apex: 60m Mulder Design yacht concept unveiled

Mulder Design has unveiled the first details of the 60-metre superyacht concept Apex. 

Mulder Design unveils 60m yacht concept Apex designed for performance 

This article is featured as a guest post by Michel L'Ortye, the second generation of&nbsp;<a data-gid="gid://syiq/Company/8888" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Paul L'Ortye Yacht Insurance (Company)">Paul L'Ortye</a>&nbsp;Superyacht Insurance.In superyacht insurance, ''the difference is rarely found in what is covered, but in how it is worded''. At first glance, two insurance proposals may appear comparable. Similar limits, familiar terminology, and a competitive premium. Yet beneath the surface, the real differences emerge in structure, interpretation, and legal context.We asked ChatGPT to compare two superyacht insurance proposals. The outcome was structured, fast, and seemingly logical. But it also revealed a fundamental limitation: without true contextual understanding, critical differences remain unseen.This article highlights where that gap lies, and why specialist expertise remains essential.<img src="https://photo-assets.superyachttimes.com/photo/396822/image/large-d04de7387341e559ee1e637ffd910549.jpg" data-gid="gid://syiq/Photo/396822">1. Failure to understand layered policy structures and how clauses interact and override one anotherFor example, ChatGPT does not understand layered policy structures or how clauses interact and override one another.Policy wordings are built as layered legal frameworks, where clauses interact, override, or apply conditionally. AI tends to read them as isolated statements rather than as part of a structured system. Each insurer applies its own structure and hierarchy within the wording, often influenced by the applicable jurisdiction and its legal framework.For example, Policy A may state “worldwide navigation,” while Policy B specifies “worldwide excluding war zones.” ChatGPT may conclude that A offers broader coverage. In reality, Policy A may contain a separate war exclusion clause elsewhere in the wording that has the same, or even stricter, effect.2. Comparing apples with orangesOne operates on a Named Perils basis (only explicitly listed risks), the other on an All Risks basis (everything is covered unless excluded). The same term, but a completely different scope. ChatGPT sees “Hull &amp; Machinery” twice and concludes it is comparable, while the difference in coverage for a machinery breakdown or latent defect can amount to hundreds of thousands of euros.<img src="https://photo-assets.superyachttimes.com/photo/396820/image/large-aa15c287e8791d5230e10db1b947032c.jpg" data-gid="gid://syiq/Photo/396820">3. Deductibles and sub-limits are overlookedAI tends to focus on the main coverage and premium, while the real differences are often found in the sub-limits. These include maximum payouts per incident for tenders, crew medical limits per person, and differing deductibles for machinery damage versus navigational incidents. Such details are typically scattered throughout the policy and are easily missed.It also struggles to recognise requirements for minimum underlying covers, such as mandatory national healthcare or other primary insurance arrangements. These elements can be critical to the validity and effectiveness of the coverage, yet are rarely identified without expert review.4. What is NOT included remains invisibleChatGPT can only compare what is written. It cannot identify what is missing. No cyber clause? AI will not flag it, because there is nothing to read. A specialist, however, knows what should be there and recognises the gap immediately.It also lacks the ability to properly assess how coverage is structured. Policies may appear comparable, while in reality one is based on an all risks foundation and another on named perils, or where insurers apply their own wording with a tailored definition of “all risks.” These structural differences ultimately determine what is and is not covered, yet remain largely invisible without expert interpretation.<img src="https://photo-assets.superyachttimes.com/photo/396862/image/large-15929412d50cbaf94d80733c90eaecca.jpg" data-gid="gid://syiq/Photo/396862">5. ConfidentialityOwners upload commercially sensitive documents to a public AI. Vessel values, cruising areas, crew details, claims history, all of this is shared with external servers. For high-profile owners, this represents a serious privacy risk.6. “Cheaper = better” biasAI tends to conclude that the lower-priced option offers “comparable coverage.” In marine insurance, however, a lower premium is almost always a reflection of reduced coverage, higher deductibles, or an insurer with a weaker claims reputation. It also lacks the ability to properly weigh subtle but critical differences in policy wording, such as a depreciation clause on masts and rigging, or to recognise exclusions that carry the same practical meaning but are phrased differently, such as a market value clause applied to running and standing rigging, which in practice can largely have the same effect.<img src="https://photo-assets.superyachttimes.com/photo/396821/image/large-5911d8a80dbdc0631242e59608f5517a.jpg" data-gid="gid://syiq/Photo/396821">7. Jurisdiction and applicable lawThe governing law of a yacht policy determines how policy wording is interpreted at claim stage. The same wording can produce a very different outcome depending on the legal system behind it.This becomes particularly relevant in areas such as disclosure duties, warranties and gross negligence. Under some systems, sailing outside marked channels or ignoring a weather warning may already qualify as gross negligence, with a direct impact on the claim payment. Other systems apply a more proportional approach, or require a much higher degree of misconduct before cover can be reduced or declined.One policy may therefore respond very differently from another, despite similar wording and circumstances. These legal differences can have a major impact on the final claim outcome, yet in practice the governing law is often treated as little more than a footnote.Michel L'Ortye is the second generation of&nbsp;<a data-gid="gid://syiq/Company/8888" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Paul L'Ortye Yacht Insurance (Company)">Paul L'Ortye</a>&nbsp;Yacht Insurance, the family business&nbsp;that his father founded in 1978 and which focuses entirely on yacht insurance. Joining the company full-time over ten years ago, Michel has been working alongside his brother Didier, who leads the in-house claims operation. Michel's focus is on the high-end yacht and superyacht segment.

Guest author Michel L'Ortye compares an AI insurance proposal to a handwritten one. 

Can ChatGPT create your yacht insurance proposal?

Delivered in 2004 from Kaag, the Netherlands, the 86-metre <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> superyacht <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> was once the largest <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> yacht ever built. Recently photographed in St Tropez, SuperYacht Times takes a closer look at the steel superyacht that was built for speed. <img src="https://photo-assets.superyachttimes.com/photo/395950/image/large-78d864b2d934f5f50740eb7c6a29e533.jpg" data-gid="gid://syiq/Photo/395950">Commissioned for Russian business oligarch and politician Roman Abramovich, <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> was inspired by the 49.5-metre <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> superyacht <a data-gid="gid://syiq/Yacht/684" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sussurro49.5m (162'5&quot;)Feadship1998">Sussurro</a>. Launched in 1998, <a data-gid="gid://syiq/Yacht/684" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sussurro49.5m (162'5&quot;)Feadship1998">Sussurro</a> used aviation-industry specs, allowing her to reach an incredible 46 knots. <img src="https://photo-assets.superyachttimes.com/photo/395954/image/large-62905994bb01b749a975ff697414f3e9.jpg" data-gid="gid://syiq/Photo/395954">Much like the owner of <a data-gid="gid://syiq/Yacht/684" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sussurro49.5m (162'5&quot;)Feadship1998">Sussurro</a>, Abramovich was a keen diver and wanted to up the ante of <a data-gid="gid://syiq/Yacht/684" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sussurro49.5m (162'5&quot;)Feadship1998">Sussurro</a>. Rather than creating a larger version, he sought to build a yacht that was capable of combining long-range cruising with exceptional top-end performance. However, Abramovich liked&nbsp;<a data-gid="gid://syiq/Yacht/684" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Sussurro49.5m (162'5&quot;)Feadship1998">Sussurro</a> so much, he actually purchased the yacht several years later.&nbsp;<img src="https://photo-assets.superyachttimes.com/photo/395960/image/large-fefa85fc5dee7d132c3e58941b4d3ace.jpg" data-gid="gid://syiq/Photo/395960">Known for their high-speed yachts and crazily complex technical engineering requirements, the contract for the <a data-gid="gid://syiq/Company/29" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Feadship (Company)">Feadship</a> 790 yacht was signed in 2000, with construction beginning shortly thereafter. <img src="https://photo-assets.superyachttimes.com/photo/395955/image/large-105bb1a107567d475aca711626d08538.jpg" data-gid="gid://syiq/Photo/395955">Unlike conventional displacement yachts of her size, <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> was equipped with a unique propulsion package, combining four <a data-gid="gid://syiq/Company/1409" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MTU (Company)">MTU</a> 16V 4000 M70 diesel engines of 12,444 horsepower, with a <a data-gid="gid://syiq/Company/1992" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="General Electric (Company)">General Electric</a> LM2500 gas turbine which produces 30,843 horsepower.<img src="https://photo-assets.superyachttimes.com/photo/395953/image/large-e99a5cd6bb7a94017b38d6379e2cf1eb.jpg" data-gid="gid://syiq/Photo/395953">Together, the system generates more than 43,000 horsepower, with her diesel engines powering twin propellers for efficient cruising, while her gas turbine is connected to a large waterjet integrated into the yacht's stern, providing her with an additional boost of power.<img src="https://photo-assets.superyachttimes.com/photo/395959/image/large-57fa364d6428aed146796b54eec710e1.jpg" data-gid="gid://syiq/Photo/395959">The result allows <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> to exceed 30 knots and under diesel power alone, the yacht can reportedly reach 25 knots and cruise comfortably at around 22 knots, a remarkable achievement for an 86-metre superyacht at the time of her launch.<img src="https://photo-assets.superyachttimes.com/photo/395951/image/large-63005575fa834528f357d86247188cf2.jpg" data-gid="gid://syiq/Photo/395951">Despite her impressive performance credentials, <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> was conceived first and foremost as a luxury superyacht, combining a sleek hull form with an unusually ambitious speed requirement for a vessel of her size. She features exterior design by <a data-gid="gid://syiq/Company/30" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="De Voogt Naval Architects (Company)">De Voogt Naval Architects</a>, with interior design penned by <a data-gid="gid://syiq/Company/2" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Terence Disdale Design (Company)">Terence Disdale Design</a>.<img src="https://photo-assets.superyachttimes.com/photo/395961/image/large-7227a5562f136cbb3a394c2158974fa5.jpg" data-gid="gid://syiq/Photo/395961"><a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> boasts an Asian-inspired interior, which later went on to win several interior design awards. Rich woods are used through in tones of brown and beige, complemented by stone, glass and marble elements. <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> can comfortably accommodate up to 14 guests across a seven stateroom configuration, alongside a crew of 24. <img src="https://photo-assets.superyachttimes.com/photo/395958/image/large-49e6ee1d492528cc251472df2de109ba.jpg" data-gid="gid://syiq/Photo/395958">One of <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a>'s most distinctive features is her enormous opening in her stern, which houses the outlet nozzle for the yacht's waterjet propulsion system. As well as this, she is equipped with a helicopter hangar by <a data-gid="gid://syiq/Company/5438" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Akerboom Yacht Equipment (Company)">Akerboom</a> on her bow, with her horizontal sliding hatches completely hidden in terms of both style and technical skill.<img src="https://photo-assets.superyachttimes.com/photo/395952/image/large-1ddd66b1bacbe1579b97649f705483ad.jpg" data-gid="gid://syiq/Photo/395952">In 2009, <a data-gid="gid://syiq/Yacht/234" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Ecstasea86.0m (282'2&quot;)Feadship2004">Ecstasea</a> was sold with <a data-gid="gid://syiq/Company/322" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Merle Wood & Associates, Inc. (Company)">Merle Wood &amp; Associates</a> representing the seller, before she was sold to her current owner in June 2014, with <a data-gid="gid://syiq/Company/322" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Merle Wood & Associates, Inc. (Company)">Merle Wood &amp; Associates</a> and <a data-gid="gid://syiq/Company/159" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Burgess (Company)">Burgess</a> representing the seller.

Ecstasea: The Feadship yacht that was built for speed

SuperYacht Times takes a closer look at the 86m Feadship superyacht Ecstasea that was built for speed.

Ecstasea: The 86m Feadship superyacht that was built for speed

The 37.04-metre <a data-gid="gid://syiq/Company/112" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Custom Line (Company)">Custom Line</a> motor yacht <a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">Willpower</a> is currently for sale with Nathan Farrelly of <a data-gid="gid://syiq/Company/124" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Edmiston (Company)">Edmiston</a>. According to AIS, the <a href="https://www.superyachttimes.com/directories/yachts/for-sale" rel="noopener noreferrer" target="_blank" title="">yacht for sale</a> is currently moored at Mergellina, Italy.<img src="https://photo-assets.superyachttimes.com/photo/396809/image/large-2e2f72082cb9d6be974658c352b9ff39.png" data-gid="gid://syiq/Photo/396809">Delivered in 2018 by the Italian shipyard, <a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">Willpower</a> is the fifth hull of the acclaimed Navetta 37 series, and was previously named Singolare. According to <a href="https://sytiq.superyachttimes.com/" rel="noopener noreferrer" target="_blank" title="">SuperYacht IQ</a>, the vessel most recently underwent a refit in 2024.<img src="https://photo-assets.superyachttimes.com/photo/396799/image/large-cb91eb19376fc79fc128701033e6088b.jpg" data-gid="gid://syiq/Photo/396799"><img src="https://photo-assets.superyachttimes.com/photo/396797/image/large-edd16fb224fc895a7b0998f4fbfb1412.jpg" data-gid="gid://syiq/Photo/396797" style="box-sizing: inherit; border: 0px; font-family: &quot;Open Sans&quot;, sans-serif; position: relative; max-width: 100%; margin: 1rem 0px; color: rgb(0, 0, 0); font-size: 13.6px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Constructed with a GRP hull and superstructure, the <a href="https://www.superyachttimes.com/directories/yachts/for-sale/of-type=motor" rel="noopener noreferrer" target="_blank" title="">motor yacht for sale</a> has a beam of eight metres and a draft of 2.27-metres. The <a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">yacht Willpower&nbsp;for sale</a> features exterior design crafted by <a data-gid="gid://syiq/Company/105" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Zuccon International Project (Company)">Zuccon International Project</a>, with naval architecture developed in-house by her builder.<img src="https://photo-assets.superyachttimes.com/photo/396798/image/large-02249037d1c2a2989df8b1791e57b7a2.jpg" data-gid="gid://syiq/Photo/396798">Outside, <a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">Willpower</a> is defined by clean lines and expansive glazing, complemented by outdoor living spaces designed for entertaining and relaxing while soaking in the sun. Highlights on deck include a sundeck complete with a Jacuzzi, sunpads, and plush lounge seating, alongside a dedicated beach club and dining areas to enjoy alfresco meals spread across her decks.<img src="https://photo-assets.superyachttimes.com/photo/396800/image/large-7ed77b76a8538356af449564b4e11aa0.jpg" data-gid="gid://syiq/Photo/396800">Stepping inside, the <a href="https://www.superyachttimes.com/directories/yachts/for-sale/built-by=custom-line" rel="noopener noreferrer" target="_blank" title="">Custom Line yacht for sale</a> embraces a sophisticated yet welcoming interior characterised by dark timber finishes with soft neutral furnishings and subtle pops of colour. Her main saloon benefits from large windows that flood the space with natural light, while an open-plan layout encourages socialising between guests.<img src="https://photo-assets.superyachttimes.com/photo/396801/image/large-a4c2d5688c1105f6d0644b46b2660e84.jpg" data-gid="gid://syiq/Photo/396801"><img src="https://photo-assets.superyachttimes.com/photo/396802/image/large-75b4e4b99b7264611c2111f286a068ab.jpg" data-gid="gid://syiq/Photo/396802">With a beam of eight-metres and an internal volume of 289 GT, accommodation onboard the<a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">&nbsp;yacht Willpower for sale</a> is arranged for up to 11 guests across five well-appointed staterooms, including a full-beam owner's suite on her main deck. Dedicated quarters are also provided for up to seven crew members, including her captain.<img src="https://photo-assets.superyachttimes.com/photo/396815/image/large-76ce398f780d881b0884aac15acb353d.jpg" data-gid="gid://syiq/Photo/396815">In terms of performance, the <a data-gid="gid://syiq/Yacht/6475" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Willpower37.04m (121'6&quot;)Custom Line2018">yacht Willpower for sale</a> is powered by twin <a data-gid="gid://syiq/Company/1441" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MAN (Company)">MAN</a> engines, delivering a cruising speed of 12 knots and a top speed of 15.5 knots. Moreover, she can travel about 2,300 nautical miles at her cruising speed.&nbsp;

 37m Custom Line motor yacht Willpower for sale

 The 37.04-metre Custom Line motor yacht Willpower is currently for sale with Edmiston.

37m Custom Line motor yacht Willpower for sale

The 50.2-metre <a data-gid="gid://syiq/Company/615" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dearsan Gemi Insaat Sanayii A.S. (Company)">Dearsan</a> superyacht <a data-gid="gid://syiq/Yacht/13601" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Queen Yaz50.2m (164'8&quot;)Dearsan Gemi Insaat Sanayii A.S.2026">Queen Yaz</a> has been launched from the <a data-gid="gid://syiq/Company/615" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Dearsan Gemi Insaat Sanayii A.S. (Company)">Dearsan</a> shipyard in Tuzla, Istanbul. <img src="https://photo-assets.superyachttimes.com/photo/396859/image/large-66e26da04a7b7aeb2bcef3c2456e5bab.jpg" data-gid="gid://syiq/Photo/396859">Construction on <a data-gid="gid://syiq/Yacht/13601" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Queen Yaz50.2m (164'8&quot;)Dearsan Gemi Insaat Sanayii A.S.2026">Queen Yaz</a> began in 2022, with interior and exterior design by <a data-gid="gid://syiq/Company/4720" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Red Yacht Design (Company)">Red Yacht Design</a>, with naval architecture by <a data-gid="gid://syiq/Company/8047" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MilimetriQ (Company)">MilimetriQ</a>. As one of <a data-gid="gid://syiq/Company/4720" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Red Yacht Design (Company)">Red Yacht Design</a>’s flagship projects, she collaborated with multiple shipyards, with project management by <a data-gid="gid://syiq/Company/8085" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="MORE Marine (Company)">More Marine</a>.<img src="https://photo-assets.superyachttimes.com/photo/345749/image/large-f493bef8678282c7ba3acb9e015ee416.jpg" data-gid="gid://syiq/Photo/345749">Spanning 488 GT, boasts a warm and inviting interior design, with light tones and natural materials. Every detail has been thoughtfully designed to cater to the owner’s vision, blending contemporary aesthetics with comfort.<img src="https://photo-assets.superyachttimes.com/photo/345748/image/large-62d292dbc41853588cfb4bb25e099a9f.jpg" data-gid="gid://syiq/Photo/345748">Key features onboard <a data-gid="gid://syiq/Yacht/13601" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Queen Yaz50.2m (164'8&quot;)Dearsan Gemi Insaat Sanayii A.S.2026">Queen Yaz</a> include an aft lounge, along with an expansive bow lounge located on the main deck, both of which lend themselves to outdoor relaxation or socialising. She is also equipped with a Jacuzzi, sunbeds, lounge sofas, a bar and an alfresco dining area.<img src="https://photo-assets.superyachttimes.com/photo/396858/image/large-09e90c9bfcadd193dbfec4a24b5dbcab.jpg" data-gid="gid://syiq/Photo/396858">Built with a steel hull and aluminium superstructure, <a data-gid="gid://syiq/Yacht/13601" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Queen Yaz50.2m (164'8&quot;)Dearsan Gemi Insaat Sanayii A.S.2026">Queen Yaz</a> is powered by twin <a data-gid="gid://syiq/Company/1408" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Caterpillar Inc (Company)">Caterpillar</a> engines.&nbsp;

Queen Yaz: 50m Dearson yacht launched

The 50.2-metre Dearsan superyacht Queen Yaz has been launched from the Dearson shipyard in Tuzla, Istanbul. 

50m Dearsan superyacht Queen Yaz launched

The 24.38-metre <a data-gid="gid://syiq/Company/145" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Burger Boat Company (Company)">Burger Boat Company</a> motor yacht <a data-gid="gid://syiq/Yacht/4654" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Summer Song24.38m (79'12&quot;)Burger Boat Company1974">Summer Song</a> has been sold. Dan Wood of <a data-gid="gid://syiq/Company/4755" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Crow's Nest Yachts (Company)">Crow's Nest Yachts</a> introduced the buyer, while <a data-gid="gid://syiq/Company/145" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Burger Boat Company (Company)">Burger Boat Company</a> represented the seller.<img src="https://photo-assets.superyachttimes.com/photo/201050/image/large-b33744a281cd0a44ca553674c1cecec5.png" data-gid="gid://syiq/Photo/201050">Delivered in 1974, the yacht was previously named Nobility and was designed inside and out by her builder. Moreover, <a data-gid="gid://syiq/Yacht/4654" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Summer Song24.38m (79'12&quot;)Burger Boat Company1974">Summer Song</a> benefitted from a refit in 2025 in <a data-gid="gid://syiq/Company/13" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bradford Marine, Inc. (Company)">Bradford Marine’s</a> facility in Fort Lauderdale, Florida.She can accommodate guests in her full-beam owner’s suite with queen berth, vanity, bureau and hanging locker. Meanwhile, her guests can sleep in two VIP suites, complete with twin berths and ensuite heads with enclosed showers.In terms of propulsion system, <a data-gid="gid://syiq/Yacht/4654" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Summer Song24.38m (79'12&quot;)Burger Boat Company1974">Summer Song</a> is powered by twin <a data-gid="gid://syiq/Company/1474" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="General Motors (Company)">General Motors</a> engines, giving her a cruising speed of 12 knots and a top speed of 14 knots.Photo courtesy of <a data-gid="gid://syiq/Company/145" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Burger Boat Company (Company)">Burger Boat Company</a>.

burger yacht summer song sold

The 24.38-metre Burger Boat Company motor yacht Summer Song has been sold.

24m Burger motor yacht Summer Song sold

German shipyard <a data-gid="gid://syiq/Company/5563" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="YYachts (Company)">YYachts</a> has announced the appointment of Gregor Bredenbeck, who will take responsibility for sales and international expansion. He will oversee the worldwide sales operations of the shipyard, effective 1 June.<img src="https://photo-assets.superyachttimes.com/photo/396854/image/large-ef1cbdd6f2dcc9b8b9f7744e6ee5c394.jpg" data-gid="gid://syiq/Photo/396854">His role will also focus on advancing the international growth of the <a data-gid="gid://syiq/Company/5563" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="YYachts (Company)">YYachts</a> brand, while further developing its brokerage and charter divisions.Gregor commented on his appointment: “I felt it was time for a new challenge in my professional career, and I did not have to think twice when <a data-gid="gid://syiq/Company/5563" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="YYachts (Company)">YYachts</a> approached me. I have worked with several of my new colleagues in the past, and over recent years <a data-gid="gid://syiq/Company/5563" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="YYachts (Company)">YYachts</a> has built a truly exceptional team.”He brings decades of experience to the role, beginning in 1990 when he started building racing yachts. Gregor then moved into the sales of premium yachts, spending many years working with discerning international clients.<a data-gid="gid://syiq/Company/5563" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="YYachts (Company)">YYachts</a> founder Michael Schmidt concluded: “Gregor and I have successfully completed numerous projects together over the years. I have always admired the professionalism he demonstrated in every role he held. With Gregor onboard, we are entering a new chapter in the development of our global sales activities.”