Wind-assisted propulsion (WAPS) is becoming a key strategy for reducing fuel consumption and emissions in shipping. However, to extract the full value of these systems, shipowners must integrate WAPS with other efficiency-enhancing technologies. A holistic approach - combining wind propulsion with hydrodynamic improvements, energy-saving solutions, and performance monitoring - can significantly improve overall vessel efficiency.
As Steen Jacobsen, Njord’s Technical Director explains: “Wind-assisted propulsion is a powerful tool for reducing fuel consumption, but it doesn’t work in isolation. By combining it with the right technologies—reducing friction, optimising energy use, and leveraging real-time data—shipowners can maximise savings and improve operational flexibility.”
A ship’s resistance through water plays a major role in its fuel consumption. WAPS reduces the power required from conventional propulsion, but pairing it with friction-reducing technologies ensures that vessels extract maximum benefit. Key solutions include:
These technologies directly support WAPS by lowering overall resistance, meaning more of the wind’s force is converted into useful propulsion rather than wasted overcoming hull friction.
By integrating these solutions, vessels can run WAPS without increasing generator usage, allowing shipowners to fully realise the decarbonisation potential of wind propulsion.
One often-overlooked factor in WAPS integration is the additional energy demand from rotor sails and suction sails. Unlike fixed wing sails, these systems require electrical power to operate, creating challenges for vessels with limited generator capacity. Without proper energy optimisation, ships may need to run an extra generator—counteracting some of the emissions savings achieved by wind propulsion.
To mitigate this, shipowners can adopt technologies that reduce hotel load and free up electrical capacity for WAPS:
By integrating these solutions, vessels can run WAPS without increasing generator usage, allowing shipowners to fully realise the decarbonisation potential of wind propulsion.
Wind propulsion savings are not static—they depend on wind conditions, routing, and vessel-specific factors. A well-integrated performance monitoring system enables shipowners to fine-tune their operations and adjust routes to maximise fuel savings. Key elements include:
As Steen notes: “Without proper data and analysis, shipowners risk underutilising wind propulsion. Performance monitoring not only proves the effectiveness of these systems but also enables real-time adjustments that unlock even greater savings.”
Wind-assisted propulsion is a game-changer for shipping, but its success depends on a well-rounded efficiency strategy. By reducing hydrodynamic resistance, optimising energy consumption, and leveraging performance monitoring, shipowners can ensure WAPS delivers meaningful, long-term savings.
As the industry continues to navigate decarbonisation challenges, pairing wind propulsion with efficiency measures will enhance its effectiveness and commercial viability. With the right approach, shipowners can position themselves for both regulatory compliance and commercial success in an increasingly carbon-conscious market.
✅ Considering wind-assisted propulsion for your fleet? Reach out to Njord for expert guidance on financial modelling, regulatory compliance, and seamless installation.
✅ Catch our latest Live event on WAPS on demand? Watch the full recording here!
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