C25:33L
Liquid Fuel | 1.9 - 3.0 MW
Offshore
Bergen Engines has been a trusted supplier of engines and generating sets to the offshore market since the early seventies. The engines’ robustness and high reliability have made them a preferred choice for the harsh environments surrounding offshore installations across the globe.
Bergen Engines has an impressive track record within offshore deliveries, supplying engines and generating sets to Offshore Construction Vessels (OCV’s), Cable Layers, Wind Turbine Installation Platforms, Offshore Support Vessels (OSV’s), and more.
As the world is transitioning towards renewable alternatives to fossil fuels, we are bringing our extensive offshore experience with us to the wind turbine segment, powering offshore wind turbine installation vessels.
Reliable Performance, Service-Friendly Design & Global Support Network
Bergen Engines Powers Advanced Cable Layer
Nexans Aurora
Delivered in 2021, the Nexans Aurora is Nexans Subsea Operations’ flagship vessel for submarine cable laying. Designed by Skipsteknisk and built at Ulstein Verft in Norway, the vessel serves as a core enabler of offshore renewable energy and interconnector projects worldwide. With a length of 149.9 meters and a beam of 31 meters, Nexans Aurora is equipped for the transport, installation, and protection of high-voltage subsea cables – even under demanding offshore conditions.
The vessel plays a key role in Nexans’ strategic offshore projects, including Empire Wind in New York and the Greece–Crete subsea interconnector – both critical steps toward large-scale electrification.
Delivering Proven Efficiency and Reliability
To meet the high power demands of cable installation operations, Nexans Aurora is equipped with six Bergen B33:45L6A generator sets, each delivering 3,600 kW. Together, these medium-speed engines supply a total of 21.6 MW of onboard power. The B33:45 series is engineered for marine applications that require continuous power, minimal maintenance, and high fuel efficiency. Its modular design ensures flexibility in integration, and the engines are known for their low vibration, low structural noise, and low lifecycle costs.
These engines support a range of mission-critical systems, including dynamic positioning (DP3), cable-handling equipment, electric drives, and vessel hotel loads – enabling uninterrupted operation during
complex offshore installation tasks.
Key Facts
A Vessel for the Future of Energy
As offshore infrastructure becomes critical to global energy transition, Nexans Aurora is equipped to meet the evolving demands of subsea installation. With reliable onboard power from Bergen Engines, and a design focused on performance and sustainability, the vessel sets a high standard for future cable-laying operations.
Nexans Aurora.
Powering Island Offshore’s First Hybrid Ocean Energy Vessel
Scheduled for delivery in Q1 2027, the new Island Offshore vessel marks a significant milestone in the advancement of hybrid ocean energy construction vessels (OECVs). This innovative vessel, equipped with four Bergen C25:33L9A generating sets, is set to revolutionize subsea operations and renewable energy projects.
Equipped for Renewable Energy
The Bergen C25:33L9A generating set is a cornerstone of this vessel’s capabilities, renowned for its unmatched reliability and performance. Known for low emissions and cost-effectiveness, the C25:33L9 delivers a world-leading power-to-weight ratio, fast load response, and stable frequency, all while maintaining economical fuel and oil consumption.
The new OECV, designed in collaboration between Island Offshore and VARD, is built for a multitude of subsea operations including inspection, maintenance, and repair (IMR), subsea infrastructure construction and installation, diving support, and remotely operated underwater inspection. Additionally, the vessel is equipped for renewable energy work scopes such as walk-to-work, commissioning, cable laying and repairs, trenching, and surveying.
The First Offshore Vessel to Run on Biofuel
Island Crusader is the first offshore vessel on the Norwegian shelf running on biofuel, resulting in immediate and significant reductions in CO2 emissions. This pilot, run by Lundin Energy Norway, also proves that biogas can be used on Bergen gas engines without any modifications at all. The vessel is equipped with two Bergen C25:33L6A MDO and two Bergen C26:33L9A gas engines.
The Power of Medium-Speed
Explore our best selling engines for Offshore applications.
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B33:45L
Liquid Fuel | 3.5 - 5.4MW
Power Solutions AT SEA.
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