With Seamore 34, Antonini Navi achieves a milestone that confirms the Italian shipyard’s entry among the leading players in the sub-500 GT custom steel superyacht segment.
Born from a concept and a steel-and-aluminium platform developed in-house by Antonini Navi, with interiors by Hot Lab and exterior lines designed by Hydro Tec, Seamore 34 embodies the shipyard’s ambition to introduce a new design language to the crossover yacht market. The platform has been conceived to be interpreted each time according to the owner’s specific requirements, creating truly unique yachts without compromising construction efficiency. This project has laid the foundations for the brand’s future semi-custom range. From the outset, the goal was to create a yacht distinguished by a strong and contemporary stylistic identity. The concept draws inspiration from professional naval architecture, including tugboats, fishing vessels and military craft, reinterpreting their most iconic elements: a vertical bow, a bridge with large reverse-raked windows, sculpted volumes, and pronounced bridge wings extending from the hull, all conveying solidity, authority and character.
Designed and engineered by Hydro Tec, Seamore 34 is a 34-metre yacht that combines advanced technical and technological solutions with a distinctive and contemporary design language. The result is a sophisticated and instantly recognisable crossover yacht that seamlessly blends functionality, character and elegance in an authentically Italian expression. Pre-delivery sea trials confirmed Seamore 34’s excellent seakeeping capabilities and outstanding performance, positioning the yacht as a benchmark within its market segment. At a cruising speed of 10 knots, the yacht achieved a range of more than 4,300 nautical miles and reached a top speed of 14 knots. Equally impressive were the onboard comfort results: in the owner’s suite on the main deck, with the yacht at anchor and all systems running, noise levels measured just 39.2 dB(A), while vibrations in the main saloon, near the engine room, were limited to 0.32 mm/s, confirming both the quality of construction and the careful engineering of the propulsion system.
The yacht’s layout prioritises a seamless connection between indoor and outdoor living areas, offering more than 150 square metres of usable space on the main deck and approximately 160 square metres of outdoor areas on the upper deck. Designed by the Milan-based studio Hot Lab, the interiors strike a balance between classic and contemporary aesthetics. Carefully selected materials, including teak, pastel tones and ribbed surfaces, enhance natural light and amplify the perception of space. The delivery of Seamore 34 comes at a time of strong growth for Antonini Navi. The shipyard is preparing to launch the custom steel yacht Evo 31, while another 40-metre steel yacht is already under construction on spec, with delivery scheduled for 2028.
“For Antonini Navi, Seamore 34 represents the completion of a journey. It is a moment that encompasses the work, expertise and determination of everyone who contributed to turning into reality a new entrepreneurial vision conceived by Aldo Manna and myself. For our family, this is an important milestone, but above all it marks the beginning of a path that looks ambitiously towards the future. Watching Seamore 34 leave the shipyard, accompanied by the sound of the horn, the crew’s applause and the emotion of our entire team gathered to bid her farewell, was one of those moments I will always carry with me,” says Simone Antonini, Founder and CEO of Antonini Navi.
“It was not easy to build a network of suppliers, consultants and partners who shared our vision and were capable of working according to our quality standards and our full-custom philosophy, which requires great flexibility and a strong problem-solving mindset. Achieving this milestone is a source of particular pride for us and demonstrates how the Antonini Group has successfully transferred to the yachting world the expertise developed in shipbuilding and in the construction of offshore platforms for the oil & gas sector. It is with this approach that we intend to continue growing, building outstanding yachts that ensure reliability, quality and the highest level of responsiveness to each owner’s needs,” says Walter Antonini, General Manager of Antonini Navi.
“When an owner chooses a full-custom project, they entrust the shipyard with far more than the construction of a yacht: they entrust an idea, a vision. With Seamore 34, we have clearly demonstrated that we possess the professionalism, mindset and technical structure required to interpret, develop and build a project of this calibre. The success of the sea trials and the owner’s satisfaction represent the most important confirmation of the work accomplished,” adds Aldo Manna, Co-Founder and Sales Manager of Antonini Navi.
