Over its 40-year history, Heesen has developed a reputation for building cutting-edge superyachts that have pushed boundaries in design, speed and efficiency. From record-breakers such as Octopussy to more recent innovators such as Galactica Star, Galactica Supernova and Home, Heesen’s facility in Oss continues to play host to remarkable superyacht projects.
The latest project to draw on this extraordinary heritage is Cosmos, an 80.7 metre aluminium superyacht that is set to push the boundaries even further. With a designed top speed close to 30 knots and an efficient cruising speed in excess of 20 knots, Cosmos will use a development of the Fast Displacement Hull Form (FDHF) coupled with innovative construction and advanced propulsion solutions to set new standards for large aluminium yachts. Although the keel-laying ceremony is due to take place later this year in May, this is not the start of the project – indeed, an extraordinary amount of design and testing has already been undertaken and completed.
The proof-of-concept and testing process has comprised several stages, starting with the base naval architecture of the vessel and its hull form, progressing through extensive computational fluid dynamics (CFD) work and physical tank testing of a scale model, and culminating with the design of the propellers and rudder system. For these aspects, Heesen has drawn not only on the expertise of its in-house design and engineering department but also that of long-standing partners Van Oossanen Naval Architects, and propulsion specialists at Rolls-Royce.
The first stage was to develop the FDHF concept and ensure not only that Cosmos benefitted from the efficiency and speed gains of the design, but also that the yacht could retain inherent stiffness – a challenge because Cosmos features all-aluminium construction in order to achieve the client’s desired maximum speed of close to 30 knots. The solution was for Heesen to develop the Backbone® – a method of construction that could deliver the required stiffness in the yacht without adding weight that would have impacted on the yacht’s performance. Such has been the success of the design that the Backbone® has now been patented.
A 3.7m scale segmented model of the yacht was built to use in physical tank tests at the Wolfson Unit in Southampton. After initial data on hydrodynamics, resistance and speed had been gathered, the model has been radio-controlled and self-propelled in order to measure the various bending forces acting within the hull and to prove the Backbone® concept. That provided valuable data for fine-tuning the structural design and to further optimise the construction method.
For such a large aluminium yacht, it is particularly important to know the real forces created by the sea on the hull, not just to meet Lloyd’s Register requirements but to exceed those and construct the boat to the highest loads that could be encountered.
Using the FDHF design and the Backbone® for such a large aluminium yacht requires a slightly deeper keel depth, but this actually brings further benefits. Due to the slightly increased draft Project Cosmos has a very low block coefficient, which means that the underwater body is very slim with nice verticals in the aft ship area, for an optimal flow of water towards the propellers. This results not only in improved performance but also in higher efficiency, ensuring fast cruising with comparatively low fuel consumption.
Refining the propeller design is the ongoing job of research and design engineers at Rolls-Royce. Alongside the propeller design itself, the Promas system – where propeller and rudder are integrated into a single unit to optimise hydrodynamic efficiency – has been implemented in the design.
Rolls-Royce engineers started by gathering CFD information of the water flow towards the propeller. Then the design process began with Rolls-Royce proprietary software: different iterations of propeller and rudder design were tried before arriving at the optimal solution, which was then tested in physical experiments.
By creating a 1:11 scale model of the Promas rudder and propeller in the test tank facilities of the Rolls-Royce Hydrodynamic Research Centre (HRC) in Kristinehamn, Sweden, the propeller design was fine-tuned not only to ensure the speed and efficiency requirements are met, but also that any potential problems with cavitation can be eliminated. Cavitation is essentially where air bubbles form in the flow of water around and behind the propeller. It is particularly challenging at high speed, and as well as affecting performance it can also have severe impacts on noise and vibration – a critical consideration for any superyacht project, especially for one close to 30 knots! Cavitation issues were identified and eliminated by adjusting the rudder design. Finally, the tests proved that the propeller performed above expectations.
Project Cosmos will feature variable pitch propellers that will enable the yacht to handle both impressive cruising speeds in excess of 20 knots, as well as reaching a maximum speed close to 30 knots – a considerable achievement for an 80-metre superyacht. With the hull design optimised, the construction engineering finalised and the propulsion system going through the last stages of testing, Cosmos is already proving a milestone project for Heesen and the teams involved.
“Project Cosmos is raising the bar once again not only for Heesen, but for custom aluminium yacht building in general,” says Arthur Brouwer, CEO of Heesen. “Both from a technical standpoint and from a performance point of view we are pushing boundaries. Not only has this 80.7m project been designed to reach close to 30 knots, she has been designed for fast, 20+ knots cruising in an efficient manner. The solutions we have implemented to meet all these requirements are once again driving superyachting forward – just as Heesen has done with innovative and ground-breaking projects throughout its 40-year history.”
The 42.2-meter motor yacht Song of Songs has entered the market at EUR22,888,000 through Camper & Nicholsons, with Chief Commercial Officer Asia Julien Solari and Sales Broker Della Pearce representing the central agency. The vessel is also available for charter in Southeast Asia.Constructed in 2023 by Heysea Yachts as the first model on their Asteria 139 platform, Song of Songs was designed in collaboration with VYD Studio. The 431GT yacht features a semi-displacement hull powered by twin Caterpillar C32 ACERT engines, achieving a top speed of 19 knots with a 2,000 nautical mile range at 14 knots cruising speed.The yacht's layout accommodates twelve guests across six cabins, including an upper deck master suite with private aft terrace, a main deck secondary master, and three VIP suites plus one convertible cabin on the lower deck. Crew quarters provide for seven staff members.Notable amenities comprise a 120 square meter sun deck with hardtop-covered dining area and bar, a main deck beach club with transformer platform, and a forward lounge area featuring a hot tub. The contemporary interior design utilizes light oak joinery and marble finishes throughout the living spaces.With 26,300 liters of fuel capacity and average consumption of 320 liters per hour at cruising speed, the yacht is equipped for extended voyages. A 120KVA Kohler generator handles onboard power requirements. The vessel's design emphasizes indoor-outdoor connectivity through extensive glazing and multiple al fresco entertainment areas.Credits: Camper & Nicholsons
July 25, 2025
Nautor Swan will field sixteen yachts in this year's Rolex Fastnet Race, representing nearly the entire production history of the Finnish builder. The fleet includes models ranging from classic Sparkman & Stephens designs to contemporary German Frers creations.The 100th edition of the 695-nautical-mile race begins July 26 from Cowes, Isle of Wight, with a record 451 entries from 34 nations. The course passes Fastnet Rock off Ireland before finishing in Cherbourg-en-Cotentin, France.At a pre-race reception hosted by Nautor Swan Global Service at the Royal Air Force Yacht Club in Hamble, the all-female crewed Swan 46 Anne Bonny received the Spirit of Swan Award. The yacht is sailed by Belgian team "Swanne Bonny."Notable entrants include:Coco De Mer (Swan 62RS)Truwen (Swan 38)Galiana Withsecure (Swan 55)Miri (Swan 48)The participation follows recent Swan successes including ClubSwan 125 Skorpios' 2021 line honors victory and Swan 441 Best Buddies' dual handicap win at the Aegean 600. Simultaneously, the new ClubSwan 28 makes its competitive debut at Lake Garda.Nautor Swan was founded in 1966 in Pietarsaari, Finland. The builder entered the superyacht market in 1999. Since then, the yard has continued building high-performance sailing yachts in three different lines; ClubSwan, Swan Yachts and Maxi Swan Yachts. Credits: Nautor Swan
July 25, 2025
Azimut|Benetti Group has completed the renovation of its corporate headquarters in Avigliana, Italy, representing a €50 million investment in the historic facility. The project was inaugurated on July 24 by Chair Giovanna Vitelli and CEO Marco Valle, along with Avigliana Mayor Andrea Archinà and approximately 1,500 employees.The redesign was led by AMDL CIRCLE and architect Michele De Lucchi, who oversaw the restyling of the main building and construction of a new multifunctional pavilion. Settanta7 handled the complete renovation of employee offices, implementing modern workspace configurations to facilitate collaboration. The project included significant upgrades to the building's energy efficiency systems.The new metallic-clad entrance pavilion creates a visual dialogue with the original 1990s structure designed by Gabetti & Isola. Floor-to-ceiling glazing throughout the complex reflects Azimut's nautical design philosophy, mirroring the company's 2003 innovation of replacing portholes with hull glazing. Three panoramic meeting rooms - named Gogamigoga, Goga and Goghina after founder Paolo Vitelli's boats - offer views of the Sacra di San Michele landmark.A new Virtual Reality center serves as the technical hub of the facility, allowing the Style and Technical Offices to collaborate on yacht designs and enabling owners to customize layouts through immersive technology. The workspace redesign eliminates traditional hierarchical office structures in favor of open, transparent environments with shared workspaces."The new pavilion honors our 50-year history while projecting our future," said Giovanna Vitelli. "Like the Louvre pyramid, it represents changing times while respecting the past."The renovated headquarters will become fully operational in September 2025. The project maintains the facility's original architectural character while incorporating modern workplace design principles. No operational disruptions are anticipated during the transition period.Founded in 1873, Benetti is the oldest Italian shipyard specializing in luxury yachts. Benetti designs, builds and sells composite vessels from 29 to 44m and steel and aluminum boats from 37 to over 100m. The fleet consists of five categories: Class, Oasis, B.Yond, B.Now and Custom to meet all the needs of the market. Benetti belongs to the Azimut|Benetti Group, the largest privately owned luxury yachting group in the world.Credits: Azimut|Benetti Group
July 25, 2025
The first unit of the Ferretti Yachts 800 was launched on July 18 at the company's Cattolica shipyard. Measuring 24.47 meters in length with a 5.91-meter beam, the model completes the brand's flybridge range renewal initiated in 2018.Developed by Ferretti Group's Engineering Department and the Strategic Product Committee chaired by Piero Ferrari, the yacht features exterior design by architect Filippo Salvetti and interiors by Ideaeitalia. A version with shortened swim platform (maintaining 24-meter overall length) will be available for French market compliance.The main deck incorporates a 7-square-meter beach area with glass parapet, connecting to a crew section with three cabins accessible via portside walkway. Interior spaces feature 2-meter ceilings and extensive glazing, with the showcased unit displaying Classic styling with warm tones. The layout includes a living area with corner sofa, separate dining space with galley access, and isolated crew circulation paths.Accommodations comprise a master suite, VIP cabin, and two guest cabins totaling eight berths, all with en-suite bathrooms. The 40-square-meter flybridge offers an al fresco dining area, bar unit, and flexible aft lounge space.The inaugural unit is powered by twin 1800 hp MAN V12 engines, achieving a top speed of 31 knots and cruising at 27 knots. The Ferretti Group, led by Chief Executive Officer Alberto Galassi, is now one of the world’s leaders in the construction and sale of luxury yachts and pleasure vessels, with a unique portfolio of brands: Ferretti Yachts, Riva, Pershing, Itama, Mochi Craft, CRN, Custom Line and Wally.Credits: Ferretti Group
July 24, 2025
Sanlorenzo will debut its new 33-meter SL110A motor yacht at the Cannes Yachting Festival from September 9-14, 2025. The vessel represents the latest iteration of the shipyard's asymmetrical design series, following previous SL102A and SL106A models.Developed in collaboration with Zuccon International Project for exterior design and Piero Lissoni for interiors, the SL110A combines structural innovation with performance capabilities reaching 27 knots. The asymmetrical hull configuration provides 15% more interior volume compared to conventional designs through strategic spatial planning, including staggered port and starboard gangways that maximize usable area."The asymmetry is not just aesthetic: it unlocks greater interior space, uninterrupted views, and a feeling of openness that transforms life on board," stated Sanlorenzo CEO Tommaso Vincenzi.The yacht's redesigned bow area replaces traditional anchor storage with an integrated sea-facing terrace and swimming pool. Retractable bulwarks create 8 square meters of additional deck space when anchored, while a pivoting stern platform accommodates both tender and jet ski storage. The full-beam master suite spans 45 square meters with direct access to the foredeck pool area.Interior accommodations include five cabins for 10 guests, with two convertible twin/double staterooms. Crew quarters provide six berths in three cabins with a separate mess area. Material selections feature Calacatta marble, resin-finished ceilings, and engineered wood paneling throughout living spaces.Bernardo Zuccon of Zuccon International Project noted: "Asymmetry on SL110A is not simply a formal gesture - but a tool to reshape the spatial harmony onboard." The design eliminates 30% of traditional structural obstructions compared to previous models, improving sightlines across 210 square meters of total deck area.Technical enhancements include upgraded sound insulation in engine compartments and improved stabilization systems. The flybridge offers configurable layouts as either sun lounge or dining space, while the main deck lounge incorporates sliding glass walls that expand to create a 22 square meter waterside terrace when stationary.Production will continue at Sanlorenzo's La Spezia facility, with the Cannes display model being the first of six scheduled builds for 2026 delivery. Base pricing starts at €18 million before customization options. The SL110A represents the continued development of Sanlorenzo's asymmetrical series, which currently accounts for 40% of the shipyard's motor yacht orders.Sanlorenzo was founded in 1958 in Viareggio by yacht builder Gionvanni Jannetti. In 2005, Massimo Perrotti became the majority shareholder in the shipyard. Sanlorenzo builds yachts ranging from 28.60 to 73 meters in length. Credits: Sanlorenzo
July 24, 2025