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.”
Dynamiq has released new exterior images of its 52-meter GTT 170 superyacht, currently under construction at its Antalya shipyard in Turkey. The aluminum-hulled vessel, designed for shallow-water cruising with a 2-meter draft, targets owners in the U.S. and Middle East markets, with delivery scheduled for the 2027 Mediterranean season.The GTT 170 features naval architecture by Vripack, combining a top speed of 19 knots with IMO Tier III-compliant MAN V12 1,066 kW engines and an integrated battery pack. The stabilization system includes four electric fins and a Hull Vane aft foil to reduce pitch motion.Accommodation comprises five guest staterooms and an owner's suite, with a two-level beach club featuring a pool, bar, and spa with fold-out terraces. The sun deck includes an outdoor cinema and lounge areas.Dobroserdov Design developed the exterior, while Claudio Pironi & Partners created minimalist interiors using teak and natural marble. The yacht is being built at Dynamiq's Antalya facility with European subcontractors and Turkish craftsmen.Hull #2 is available for €29 million. The GTT 170's shallow draft enables access to Caribbean destinations like the Exumas and St. Barths, with 500 GT volume optimized for sub-50-meter length. No hybrid propulsion option was specified for this hull.Dynamiq was founded in 2014 by experienced yacht broker and designer Sergei Dobroserdov. Dynamiq is the first company in the superyacht industry to introduce an online configurator, allowing the yacht to be easily and transparently customized down to the last detail. Dynamiq unveiled its first launch at the 2016 Monaco Yacht Show.Credits: Dynamiq
May 13, 2025
Denison Yachting has entered an exclusive global partnership with French shipyard JFA Yachts to represent its Long Island brand of sail and power catamarans. The agreement focuses initially on models ranging from 70 to 100 feet.JFA's aluminum-hulled Long Island catamarans are designed for transoceanic cruising, with engineering by Marc Lombard Yacht Design Group and interiors by Darnet Design. The yachts emphasize lightweight construction, customizable layouts, and systems optimized for long-range performance. A Long Island 85 has recently sold, with a new Long Island 87 model scheduled for delivery later this year.Long Island 87David Johnson, Denison broker and U.S. brand representative, stated: "Alongside my colleague Simon in Europe, I'm proud to promote a shipyard that leads the world in building aluminum-hulled sailing and power catamarans—vessels purpose-built for owners seeking to explore the most remote parts of the world in total comfort."Simon Turner, overseeing European and global sales, added: "These exceptional, round-the-world-capable catamarans deliver an unmatched level of performance, luxury, and safety that is unparalleled anywhere else."Long Island 86 PowerJFA Yachts CEO Frédéric Jaouen noted: "We pride ourselves on attentively listening to our clients’ needs, exercising discretion, and developing trusted relationships. The savoir-faire of our team has earned JFA Yachts a reputation as one of the most respected shipyards in the world."The partnership expands Denison's portfolio of specialized cruising catamarans while providing JFA with global distribution channels. No specific sales targets or production figures were disclosed.Long Island 87 SailWith a rich family history dating back to 1948, Denison Yachting is a leader in the industry, providing comprehensive yachting services worldwide. With over 20 waterfront offices and a team of 90+ licensed brokers, Denison offers superyacht sales, yacht charter, crew placement, and new construction services. Their extensive experience and passion for yachting ensure a long-term perspective and commitment to excellence.French shipbuilder JFA Yachts was founded in 1993 by Frédéric Jaouen. JFA Yachts builds mono- and multihull power and sailing superyachts from 24 to 50 meters in length. Credits: Denison Yachting
May 13, 2025
Ferretti Group's Custom Line brand has launched four new custom yachts at its Ancona shipyard within eight weeks, including two Navetta models and two planing vessels. The launches demonstrate the shipyard's capacity for bespoke construction, with each yacht reflecting owner-specific customization through collaborative design processes.Custom Line 30#23The first vessel, a 32.82-meter Custom Line 106' (hull #24), launched on January 9, features exterior design by Ferretti Group Engineering and interiors developed by Custom Line Atelier in consultation with the Middle Eastern owner. The yacht's minimalist aesthetic combines dark wall coverings with light surfaces, complemented by freestanding furniture and folding guest tables. A social-focused flybridge completes the layout.On February 13, the 34th Custom Line Navetta 33 (33m x 7.52m) debuted for a European family. Its exterior was designed by Ferretti's Strategic Product Committee, with interiors by the Group's Engineering Department and Custom Line Atelier. The design employs dark finishes, pale marble, and leather accents, with mirrored surfaces enhancing spatial perception. American walnut flooring and ribbed master cabin details emphasize tactile refinement.Custom Line 33#34Two additional undisclosed models in the planing line were also completed during this period. Custom Line emphasizes direct owner involvement in all projects, with each yacht undergoing tailored design and construction processes at the Ancona facility. No delivery timelines or further technical specifications were disclosed for the recent launches.The consecutive completions highlight Custom Line's operational capacity for concurrent custom projects, with all four yachts now undergoing final outfitting before delivery to their respective owners. A new Custom Line Navetta 30 was launched on February 20 at a ceremony attended by the captain, the dealer and all the shipyard’s employees. The 23rd hull in the brand’s displacement line is the result of a joint design effort by the Product Strategy Department – for the exterior design – and the Ferretti Group Engineering Department, with interior architecture penned by ACPV ARCHITECTS Antonio Citterio Patricia Viel and exteriors designed by architect Filippo Salvetti. They were supported by the interior design experts at Custom Line Atelier, who liaised directly with the owner – based in the MEA area – to ensure that the yacht is a true-to-life portrait of the people who live on her. Permeated by a sporty but sophisticated spirit, the yacht has a design vision with a clear focus on conviviality. The rich hues of sand-coloured leather and Orobica marble act as warm, vibrant accents in a palette dominated by dark grey finishes, creating a bold yet refined chromatic interplay. The freestanding furniture solutions, featuring numerous formal and informal seating arrangements – including large sofas and coffee tables that bring guests together in conversation – reveals a design sensibility that understands the art of hospitality. It’s a choice that reflects the tastes and culture of an owner who comes from a city where hospitality is an integral part of the lifestyle.Custom Line 120'#12The launch of the 12th Custom Line 120’ last February 27 is the result of a design effort involving the Ferretti Group Engineering Department, supported by Custom Line Atelier for the interiors. With a length of 38.36 metres and a beam of 7.65 metres, this yacht combines a sleek silhouette with styling that effectively mirrors the owner’s vision. Designed for the AMAS market, the yacht stands out for her generous, welcoming spaces, where chairs with armrests and deep armchairs reveal a clear desire for comfort. The interiors, decorated with a palette of bright neutral colours, are styled with a simple but refined approach. The made-to-measure master bathroom features a pair of Calacatta Oro marble basins in the centre and beside them a vanity table with opening mirror and incorporated pouf; the generous shower cubicle is on the starboard side and the sanitary area is located to port. The care lavished on the layout and detailing highlights the bespoke nature of the design, driven by the desire to offer the ultimate in well-being. 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
May 13, 2025
Italian yacht builder Apreamare will make its first appearance at the Venice Boat Show from May 29 to June 2, 2025, alongside exclusive Northern Italy dealer Pedetti Yacht Sales. The event, held at Venice's historic Arsenale, will feature 270 exhibitors and 300 boats, with Apreamare showcasing its new Gozzo 38 Cabin model.The Gozzo 38 Cabin, designed by Cataldo Aprea and Marco Casali in collaboration with engineer Umberto Tagliavini, expands on the open Gozzo 35 with enhanced interior space and weather protection. The 11.45-meter yacht features a deckhouse for improved habitability, a 4-panel glass door connecting the cockpit to the dinette, and a layout with two cabins and a 2-meter headroom bathroom. The guest cabin includes a 140-centimeter-wide bed, exceeding standard dimensions for its class.Exterior amenities include a convertible cockpit table, L-shaped seating for six, and an extended beach platform. Propulsion options comprise twin Volvo Penta D4-270 DPI or D4-320 DPI sterndrives, or a traditional Volvo Penta D4-320 shaft configuration.The participation highlights Apreamare's focus on Northern Italy's market, where demand for its Sorrentine Gozzo designs continues to grow. The Venice Boat Show marks the first public exhibition of the Gozzo 38 Cabin, positioned between the Gozzo 35 and flagship Gozzo 45 in Apreamare's lineup.The history of the shipyard starts in 1849, when Giovanni Aprea started to handbuild rowing and sailing boats used for fishing in Sorrento, basing his craft on the shape and form of the traditional “gozzo sorrentino”. Now the shipyard range includes the Apreamare and Maestro yachts.Credits: Apreamar
May 12, 2025
GX Superyachts has unveiled interior details of its debut 42-meter model, the GX42 Raised Pilot House, designed for family-focused ownership with delivery scheduled for 2026. The yacht features an organic-inspired interior by Marco Casali and hybrid propulsion for efficient operation.The Raised Pilot House configuration allocates the main deck to a full-beam owner’s suite with private foredeck terrace, walk-in wardrobe, and office space. The lower deck accommodates a VIP suite with fold-down balcony and three flexible guest cabins, including a children’s cabin with Pullman berth. Social areas include a 10-person dining space on the main deck and an upper deck with hot tub, bar, and lounging areas.Owner Vladimir Zinchenko stated: "The debut GX42 shows what is possible, while remaining true to the principles of Responsible Yachting. For a boat with a slim, efficient hull, the volume is phenomenal."Casali’s design employs walnut wood paneling, white leather, and Italian fabrics, with curved edges throughout to enhance a relaxed ambiance. Lighting by Ultra Luce and artwork from the owner’s collection complete the aesthetic."This is no showboat for flexing the muscles," said Casali. "We worked closely with the owners to realise their priorities for a family friendly design that favours extended periods on board."The GX42 represents the first released details of GX Superyachts’ new line, emphasizing sustainable materials and long-range cruising capabilities.Credits: GX Superyachts
May 12, 2025