Steel Waterjet S-3/CA

The S3/CA incorporates numerous improvements made possible by advanced design calculation methods and testing and production techniques.

The compact reversing bucket and steering nozzle of the S3/CA waterjet enables superior position keeping and maneuverability at low and high speed. This reduces fuel consumption and lowering noise and emissions in harbor maneuvering, 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 S3/CA waterjets can be individually optimized and selected based on boat design requirements and operational profile.

Higher speed in curves

The steering nozzle design in S3/CA provides 2 – 3 knots higher speed in tight turns. In addition, full scale tests confirm the nozzle to be significantly quieter compared to the earlier design.

Heavy duty stainless steel pump unit

The S3/CA is always equipped with a duplex stainless-steel pump unit providing the best possible durability under any circumstances. High end components are used, providing long life and reliable service. These are enabling up to 10,000 h or 5-year time service/replacement of wear parts.

Bollard pull capability closing the gap to conventional propulsors

The S3/CA waterjets standard inlet provides very 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.


Waterjet size Max power (kW)
S25-3/CA 450
S28-3/CA 570
S32-3/CA 750
S36-3/CA 950
S40-3/CA 1320
S45-3/CA 1670
S50-3/CA 2060
S56-3/CA 2580
S63-3/CA 2600

Modular interceptor trim

All S3/CA waterjets can be delivered with modular interceptor trim tabs bolted directly onto the waterjet, including hydraulics and control panels for electronics. Modular bolt installation enables easy retrofitting. The interceptor trim system improves acceleration and low speed characteristics, in addition to trim angle adjustment.

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.

Skid version

Available between size 25 to 63. As a standard steel series has inlets made of marine grade weldable aluminum as an integral part of waterjet unit. This alternative means quick and cost effective installation at the shipyard.

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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