As ship operators move toward hybrid and electric propulsion, the demand for systems that combine efficiency, reliability, and retrofit flexibility continues to grow. Our Twin Fin solution is an innovative dual-fin propulsion concept designed to improve hydrodynamic performance and lower fuel consumption. By integrating two prefabricated fins into the hull, each containing its own propulsion unit, the system achieves smooth water flow, balanced thrust, and reduced emissions, providing a durable and energy-efficient alternative for modern marine operations.
Fuel savings and operational efficiency:
Optimized hydrodynamics design allow larger propellers and reduced shaft speeds, reducing fuel use and lifetime operating costs.
Reduced environmental impact:
Lower fuel consumption reduces CO₂ and NOₓ emissions, supporting regulatory compliance and sustainability goals.
Durable and reliable construction:
Protected fin-mounted components and internal hull access simplify maintenance and extend service life.
Low noise and vibration levels:
Refined fin and propeller geometry minimize vibration and cavitation for improved comfort and quiet operation.
Optimized internal space: Fin-mounted propulsion frees hull space for cargo and payloads.
Retrofit-ready configuration: Prefabricated fins enable fast, low-cost retrofits with minimal downtime.
Fuel savings and efficiency: Increased propeller diameter and lower shaft speed reduce fuel use and lifetime costs.
Reduced environmental impact: Lower fuel use reduces CO₂ and NOₓ emissions.
Durable and reliable construction: Protected fin-mounted components simplify maintenance and extend service life.
Low noise and vibration: Optimized fins and propellers reduce noise, vibration, and cavitation.
Optimized internal space: By relocating propulsion machinery into the fins, valuable cargo and payload areas inside the hull become available for other uses.
Fuel savings and operational efficiency: The optimized hydrodynamic design allows for larger propeller diameters and reduced shaft speed, producing measurable fuel reductions and lower lifetime operating costs.
Compact, space-saving design that frees valuable engine-room area.
Simplified installation through an integrated motor-propeller assembly.
Reduced lifecycle costs with longer service intervals and reduced maintenance.
Future-ready flexibility, supporting both fully electric and hybrid propulsion integration.
The Twin Fin Propulsion System is suitable for:
Custom configurations are available to match shipyard logistics and operating schedules, ensuring efficient and cost-effective installations. The Twin Fin package include:
The Twin Fin Propulsion System offers unmatched mechanical strength and smooth hydrodynamic balance. By placing propulsion equipment inside the fins, internal machinery space is freed up and equipment is better shielded from external forces. The system supports diesel-electric, hybrid, and fully electric operation modes, ensuring flexibility for current and future energy requirements. Routine maintenance can be performed internally without requiring dry-docking, minimizing operational interruptions.
No two vessels are the same, and neither are our CPP systems. We collaborate closely with designers to create fully customized propulsion solutions that meet the unique demands of each project. Together, we design the setup that’s right for your vessel.
We tailor everything from propeller size and blade design to gearbox ratios and control system functionality, fine-tuning the entire setup to match your vessel’s performance goals.
Need a tailored solution? Let us know!
Discuss your vessel’s retrofit or new-build requirements with our propulsion specialists. Request a performance estimate, engineering evaluation, or integration plan to see how the Twin Fin system can improve efficiency and reliability across your fleet.
The system uses two symmetrical fins mounted externally along the hull. Each fin contains its own motor, shaft, and propeller optimized for laminar flow and minimal turbulence. This twin configuration provides balanced thrust and higher overall efficiency. The slow-turning, large-diameter propellers provide high efficiency while also reducing cavitation, noise, and vibrations.
Compared with azimuth or conventional shaft systems, the Twin Fin hybrid propulsion system achieves smoother power transmission, easier access for maintenance, and improved mechanical reliability in demanding marine environments.
The Twin Fin system is designed to integrate with a wide range of power and control architectures, including:
This adaptability allows efficient operation across offshore, commercial, and passenger applications that demand precise control and reduced energy use.
With internal maintenance access, inspections and component replacements can be completed while the vessel remains afloat. Berg Propulsion provides complete lifecycle services, including remote monitoring, preventive maintenance, spare-part logistics, and retrofit support. These services maximize vessel uptime and maintain long-term performance reliability.
The Direct Drive Electric has been successfully implemented on cargo and luxury vessels across Europe, delivering proven performance gains in efficiency, comfort, and sustainability.
Frequently Asked Questions. Don’t find what you are looking for? Contact us directly.
Yes, the Twin Fin Propulsion System was specifically developed for twin fin retrofit installation, minimizing hull modifications and reducing downtime.
Yes. The design supports twin fin electric propulsion system setups and hybrid operations, enabling future-ready vessel electrification.
By combining hydrodynamic fin design with large, slow-turning propellers, the Twin Fin Propulsion System minimizes cavitation and turbulence, resulting in lower vibration and radiated noise.
Offshore, research, fishing, and passenger vessels achieve the highest efficiency and comfort improvements.
Technicians can access key components internally, which reduces or eliminates the need for dry-docking.
Compared with azimuth thrusters, the dual fin propulsion system offers greater efficiency, simpler mechanical layout, and lower vibration while maintaining strong maneuverability.
We are looking forward to hearingfrom you and discussing how we can be of assistance in making sure that your fleet is fully covered.
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At Berg Propulsion we are specialists in propulsion solutions, trusted for delivering reliable, efficient, and customized systems, supported by worldwide lifecycle support, keeping our customers moving forward with confidence.
Berg Propulsion AB
Andvägen 26
475 40 Hönö, Sweden
Berg Propulsion Production AB
Långesand 1
475 31 Öckerö, Sweden
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