Steel Waterjet S-4

Kongsberg Maritime is improving and streamlining its steel series waterjets, further raising the unit efficiency as well as lowering the cost of ownership. A modular system provides a choice of inlet materials and installation strategies.

Waterjets.jpgThe S4 waterjets provides the best pump efficiency on the market, for each operational profile and purpose. The efficiency is improved over the whole speed range, and matches the increased demand of vessels even below 30 knots. This translates into reduced fuel consumption for a given workload and consequently reduced CO2 emissions, as well as increased range. Environmental benefits are achieved not only by increasing efficiency, the inboard hydraulics also reduce the risk of oil spill.

The steel series incorporates numerous improvements made possible by advanced design calculation methods and testing and production techniques. The compact reversing bucket and steering nozzle enables superior position keeping and manoeuvrability at low and high speed. This reduces fuel consumption and lowering noise and emissions in harbour manoeuvring, as well as saving time and increasing safety. In high speed turns the steel series maintains speed very efficiently, which is a highly appreciated benefit for patrol vessels and others alike.

Low and high speed performance in the same package

At the heart of the waterjet is the fully stainless steel mixed flow pump. There are different impellers depending on application. Efficiency has been achieved by using the latest computational fluid dynamics (CFD) techniques combined with extensive testing in the cavitation tunnels at the KONGSBERG Hydrodynamics Research Centre. The steel series waterjets can be individually optimised and selected based on boat design requirements and operational profile. 

Heavy duty stainless steel pump unit

The steel series is as always equipped with a duplex stainless steel pump unit providing the best possible durability under any circumstances. Best in class components are used, providing long life and reliable service. These are enabling up to 15,000 h or 5 year time service/replacement of wear parts. 

Bollard pull capability closing the gap to conventional propulsors

Kamewa waterjets have a new inlet duct design as standard, providing extremely good low and mid speed performance. In practice this means increased bollard pull thrust comparable to conventional propulsors. High speed inlets are available for speeds exceeding 45 knots.

Modularisation by customer choice

The new Kamewa waterjet are designed for ease of installation and maintenance as well as meeting a variety of customer needs, such as hull material, hull design and forms and optimized inlet ducts.

Stand alone installation with separate inlet duct

Available from size 56 to 112. Waterjets with inlet duct supplied as loose item and supplied in material specified by customer. This enables optimized performance, yet reduces labor at the yard.

Stand alone installation with inlet drawing

Available from size 56 to 112. Waterjets supplied with drawing of hydrodynamic design of inlet duct. This enables optimal performance and hull stiffness when building in FRP.

Remote control systems

Kongsberg Maritime can supply a number of different control systems, ranging from rugged, standardized systems and up to multi station, custom design systems.

56 2300
63 2800
71 3600
80 4600
90 5800
100 7200
112 8900

Services and support

  • 24/7 Technical support

    Our 24/7 technical support team is there to help at any time, day or night, wherever your vessel is.

  • Conversions, retrofit and refit

    We understand the importance of having the right parts, available in the right place, at the right time.

  • Training

    Ensure that your crew is properly and thoroughly trained. This will reduce operational risk, downtime and maximise return on asset investment.

How can I help you?

Magnus Fahlén
VP Waterjet Sales


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