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.”
Azimut has launched the Magellano 27M, a 27-meter yacht representing the third generation of its Voyager series. The design features exterior work by Jarkko Jämsén and interior spaces by AMDL CIRCLE & Michele De Lucchi, marking the architecture firm's first marine project.The yacht incorporates a loggia-style main deck with full-height glazing designed to create visual connection with marine environments. The exterior design emphasizes clean lines and curved surfaces intended to reflect light and water movements. Jämsén's approach focused on reducing visual elements to create what the designer terms a "bare shape" that integrates with natural surroundings.Interior spaces utilize light wood finishes and architectural elements inspired by Mediterranean patio designs. The layout prioritizes natural illumination through extensive glazing, with wooden structural components serving both functional and aesthetic purposes. The design team treated natural light as a structural material throughout the living spaces.Technical specifications include long-range cruising capabilities consistent with the Magellano series' explorer yacht positioning. The vessel maintains Azimut's dual-mode hull design, offering stability in various sea conditions while maintaining fuel efficiency during extended voyages.The Magellano 27M accommodates owners focused on extended cruising rather than seasonal Mediterranean use. Interior configurations emphasize connection with external environments while maintaining privacy requirements during long-term onboard living.The yacht represents Azimut's continued development of its Voyager series, which targets owners seeking transoceanic capabilities combined with contemporary design aesthetics. The collaboration with architectural firm AMDL CIRCLE introduces new design approaches to marine interiors, particularly in the treatment of natural light and spatial organization.Production will utilize Azimut's existing manufacturing facilities, with the Magellano 27M positioned as the new flagship of the Voyager line. The yacht is scheduled for public presentation during the 2025-2026 boat show season following initial client deliveries.The Magellano series now spans multiple size categories, with the 27M model representing the largest current offering in Azimut's explorer yacht range. The company continues to develop both motor yacht and explorer segments simultaneously across its product portfolio.Credits: Azimut
September 8, 2025
Project Tanzanite, a 120-meter Amels Full Custom superyacht, has reached the next stage of construction following her launch at the Damen Yachting facilities in Vlissingen. At 6,083 GT, she is the largest new build completed by Amels to date.The yacht first entered the Netherlands in June 2023, arriving from Damen Yachting’s hull building facility in Galati, Romania, where the hull had been constructed. Since then, she has been prepared for outfitting at the shipyard’s facilities in Vlissingen City. In the weeks leading up to the launch, Project Tanzanite was floated inside the dock before moving into open water.With the yacht now in Vlissingen for the final phase of work, more than 1,000 people, including Damen Yachting teams and members of the international superyacht supply chain, will contribute their expertise over the next year. Completion is scheduled for 2026.Project Tanzanite is a one-off Amels Full Custom design. The exterior is by Espen Øino, while details about the interior remain undisclosed. Damen Yachting provided the naval architecture for the project.Key figures for the yacht include a length of 120 meters (394 feet) and a gross tonnage of 6,083.Credits: Amels
September 5, 2025
Ferretti Group will present six world premieres at the Cannes Yachting Festival 2025, held September 9–14, alongside a fleet of 25 yachts. The debuts include models from Ferretti Yachts, Itama, and Riva: the Ferretti Yachts 800, Itama 54, Riva Aquariva Special, Riva Cento, Riva 58’ Capri, and Riva 112’ Dolcevita Super. These will be joined by the Ferretti Yachts 940 and Pershing GTX70, introduced earlier this year in Venice. Wally will also be present with the wallywind110 in the sailing section at Port Canto.The Ferretti Yachts 800, designed with Filippo Salvetti and Ideaeitalia, measures 24.47 meters in length with a beam of 5.91 meters. It offers large windows, an optional salon sliding door, and a 40-square-meter flybridge. Powered by MAN V12 engines, it reaches up to 31 knots.The Itama 54, styled by Tommaso De Luca, features a double-cockpit layout with seating for 10, extended side glazing, and a lower deck with two cabins. Its LOA is 16.44 meters with MAN engine options up to 850 hp.The Riva Aquariva Special updates the long-standing Aquariva line with new navigation lights, redesigned windscreen, and expanded swim platform while maintaining analogue helm instrumentation. It measures 10.07 meters and reaches 41.5 knots.The Riva Cento, marking the 100th Rivamare, introduces new color options, integrated stern handrail, and a convertible interior dinette. With an LOA of 11.88 meters, it is powered by twin Volvo Penta engines.The Riva 58’ Capri is an evolution of the 56’ Rivale with three cabins, a fixed hardtop, and garage options for tenders and water toys. Its length is 17.27 meters with speeds up to 37 knots.The Riva 112’ Dolcevita Super, at 34.37 meters, features fold-out terraces in the stern, redesigned flybridge, and two interior layout options. Twin MTU engines deliver speeds of up to 25.5 knots.Also on display are the Ferretti Yachts 940, a 28.97-meter widebody yacht with five cabins and floor-to-ceiling glazing, and the Pershing GTX70, a 21.76-meter model with expanded exterior areas and a sundeck split into three zones.Ferretti Group’s presence at the show will be accompanied by a range of luxury partners including Range Rover, Flexjet, Dolce & Gabbana, Frette, Venini, and Lavazza, among others.Credits: Ferretti Group
September 5, 2025
Sanlorenzo S.p.A. announced consolidated financial results for the first half of 2025, reporting €454.1 million in net revenues from new yacht sales, representing a 9.4% increase compared to H1 2024. EBITDA reached €80.5 million, an 8.5% year-over-year increase. The company maintained a robust order backlog of €1.44 billion, with 93% of orders already sold to final clients.Chairman and CEO Massimo Perotti stated: "The first half of 2025 reflects the resilience of Sanlorenzo, the strength of our brand, and the timeless desirability of our yachts. Even in a global environment marked by trade tariff uncertainty and broader macroeconomic pressures, we have delivered stability and measured growth."Order intake increased 29.9% to €419.5 million, driven particularly by strong demand for yachts exceeding 30 meters. The net backlog stood at €985.2 million as of June 30, 2025, providing approximately one year of revenue visibility.Regional performance showed Europe accounting for 58.8% of revenues (€267.1 million, +15.4% YoY), Americas contributing 21% (€95.3 million, +38.6% YoY), APAC at 12% (€54.4 million, +5.8% YoY), and MEA representing 8.2% (€37.3 million, -41.3% YoY).Division performance varied: Superyacht Division revenues increased 10.2% to €137.1 million, while Yacht Division declined 6.6% to €225.8 million primarily due to market conditions below 30 meters. Bluegame Division decreased 10.9% to €43.6 million, and Nautor Swan Division contributed €47.5 million since its 2024 acquisition.The company reported net profit of €46.6 million, a 7.0% increase from H1 2024. Net working capital remained positive at €86.6 million, though inventories increased to €186.7 million due to production ramp-up and distribution hub expansion.Sanlorenzo confirmed its 2025 financial guidance, citing strong product pipeline including three new yacht debuts at the Cannes Yachting Festival and the upcoming delivery of the 74Steel model. The company continues to focus on yachts under 2,000 GT where it believes the risk-return profile remains most favorable.Sustainability initiatives progress includes development of bi-fuel green methanol propulsion technology, though the launch timeline for the 50 X-Space project has been adjusted to align with expected infrastructure availability toward the end of the decade.The company maintains its net financial position with €8.3 million net debt as of June 30, 2025, following dividend payments of €34.7 million and €11.1 million share buyback program execution during the period.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
September 5, 2025
Italian marine manufacturers Castoldi and Nauta have developed the Jet Tender 34 Limo, marking Castoldi's first entry into the limousine tender segment. The 10.4-meter vessel will serve as ship-to-shore transportation for a new boutique cruise ship fleet under construction in Italy, with four limousine tenders and two support vessels ordered per vessel.Giacomo Castoldi, CEO of Castoldi, stated: "This project represents a new chapter for Castoldi that expands our offerings to new markets, while maintaining the commitment to innovation, quality, and luxury we are known for." The collaboration utilizes Castoldi's waterjet propulsion technology and semi-serial production capabilities combined with Nauta's design approach.Nauta Director Guido Valtorta noted: "Typically, limousine tenders are custom-made for large yachts, but this project allowed us to merge bespoke luxury with the efficiency of semi-serial production." The design incorporates multiple boarding points, configurable seating arrangements, and ceiling lighting systems aimed at creating spacious interior environments.Technical features include Castoldi's ACES electronic control system and waterjet propulsion designed for commercial vessel applications. The tender achieves cabin cooling within 15 minutes and incorporates noise-reduction systems within rub rails. The platform allows for Open Limo and Support Vessel configurations through modular design principles.The first unit is scheduled for delivery in late 2025, with project presentation planned for the Monaco Yacht Show. The tender measures 10.4 meters in length with limousine-style enclosed cabin accommodation. Production follows semi-serial methods rather than custom one-off construction, representing a new operational approach for Castoldi in this vessel category.The partnership combines Castoldi's marine engineering capabilities with Nauta's yacht design experience, targeting the growing market for luxury tender operations in cruise ship and superyacht sectors. The design emphasizes functional elements including pantry facilities and toilet accommodations within the compact hull form.Credits: Nauta
September 4, 2025