Kongsberg Maritime has marked the launch of its new Kamewa S-4L waterjet series with a major contract to supply propulsion systems for Gotlandsbolaget’s next-generation high-speed ferry, ‘Horizon X’.
The multi-fuel vessel, currently under construction at Austal, is hydrogen-ready and is considered to represent a significant step toward sustainable high-speed ferry operations. Horizon X will operate on the Gotland–mainland Sweden route, connecting Visby with Nynäshamn and Oskarshamn. This route demands high speed, efficiency, and reliability to meet passenger expectations and optimise turnaround times, making advanced propulsion technology essential.
The ferry will feature two S160-S4L waterjets and two S100-S4LB booster units, marking the first commercial installation of the new S-4L series. Developed by combining the best characteristics of Kongsberg Maritime’s S3 and S4 models, the S-4L delivers improved manoeuvrability, efficiency, and durability for large high-speed ferries and naval vessels.
Key enhancements include a dual bucket and steering nozzle system that significantly improves low-speed handling and docking efficiency, reducing turnaround times and fuel consumption. The S-4L series maintains a mean time between overhaul (MTBO) of 25,000h or five years, making it suited to demanding operational profiles. Constructed from duplex stainless steel, the waterjets offer high strength and corrosion resistance.
The Horizon X design is hydrogen-ready, supporting Gotlandsbolaget’s long-term ambition to transition to zero-emission operations. This forward-thinking approach positions the vessel as a pioneer in sustainable high-speed ferry travel.
Jonas Moberg, Head of Newbuildings, Gotlandsbolaget, said: “For this challenging and innovative project, we aim to elevate the building of high-speed craft to the next generation, where the vessel incorporates new developments that support cleaner maritime transport, with proven and reliable technology as the foundation. The new S160 S4L waterjets with dual buckets provide not only efficient, powerful propulsion and manoeuvrability, but also the ability to reduce erosive effects in ports when docking sideways.”
Frederik Appel, Director Products, Waterjet Systems, Kongsberg Maritime, added: “The S-4L series represents a major evolution in waterjet technology, designed to meet the needs of the next generation of high-speed ferries and naval craft. We are proud to be part of a project that is advancing the energy transition in the ferry market. By combining proven design elements with new innovations, we’ve created a solution that delivers outstanding performance, reliability, and efficiency.”
The S-4L series will be available from size 100 and above, ensuring flexibility for operators seeking high-speed, high-efficiency propulsion solutions.
Image: Waterjet S-4L (source: Kongsberg)
