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World’s Biggest JackUp Vessel

World’s Biggest JackUp Vessel: regulatory and compliance context for US, UK, Canada, Australia, Singapore and European maritime readers.

Marine Insight 360· Aug 5, 2025· 5 min read
World’s Biggest JackUp Vessel
World’s Biggest JackUp Vessel

Biggest Jackup Vessel is the focus of this article because it connects ship operators, masters, safety officers and compliance teams with the wider question behind World’s Biggest JackUp Vessel.

Introduction to the Voltaire: A Game-Changer in Offshore Wind Installation

The world's largest Jackup Vessel is the Voltaire, named after the renowned Enlightenment philosopher Voltaire. Owned by the Jan de Nul Group, the vessel was delivered in 2022. It has a lifting capacity exceeding 3,200 tons, is 182 meters long, and is 60 meters wide. The Voltaire is designed to install the next generation of offshore wind turbines, including those at the Dogger Bank wind farm, which will be the world's largest offshore wind farm upon completion.

The Voltaire has already installed 277 GE Renewable Energy Haliad-X offshore wind turbines across the Dogger Bank wind farm's three phases, A, B, and C. According to the Jan de Nul Group, it is also the world's tallest liftboat, surpassing the Eiffel Tower. The largest crane vessel is equipped with an Ottoman crane, with four 130-meter-long outriggers, capable of lifting cargoes up to 16,000 tons.

This ultra-low-emission vessel is equipped with an advanced exhaust gas purification system, which reduces emissions and meets the stringent requirements of the International Maritime Organization (IMO) and the MARPOL convention.

The Voltaire can lift wind turbines up to 270 meters tall with blades up to 120 meters long, making it ideal for the largest and most powerful wind turbines currently in production. The vessel's design and capabilities are evidence of the innovation and expertise of the Jan de Nul Group, which has been at the forefront of offshore wind installation and construction. The Voltaire's advanced dynamic positioning system, which is compliant with the International Safety Management (ISM) Code, allows for precise maneuvering and positioning, even in harsh weather conditions.

This is critical for offshore wind installation, where the accuracy and safety of the operation are paramount.

Operational Capabilities and Safety Features

The Voltaire's spacious deck area allows for the transport of multiple wind turbine components in a single voyage, reducing the number of trips required and increasing the overall efficiency of the operation. The vessel is self-propelled and equipped with an advanced dynamic positioning system, which enables it to maintain its position and heading, even in strong winds and currents.

The vessel can accommodate up to 100 crew members, with crew accommodations located in two compartments on either side of the vessel, allowing long cargo to be stowed along the centerline.

The Voltaire also features a helicopter deck for crew transfers and logistics, which is an essential safety feature for offshore operations. In addition to its impressive lifting capacity and advanced positioning system, the Voltaire is also equipped with a range of safety features, including a state-of-the-art navigation system, emergency response plans, and regular drills and training exercises for the crew.

The vessel is designed to comply with the strictest safety standards, including those set by the International Convention for the Safety of Life at Sea (SOLAS) and the Standards of Training, Certification, and Watchkeeping (STCW) convention.

The Voltaire's safety record is a top priority, and the vessel is subject to regular inspections and audits to ensure compliance with all relevant regulations and standards. The Voltaire's operational capabilities and safety features make it an ideal vessel for offshore wind installation and construction projects. Its ability to lift and transport large and heavy wind turbine components, combined with its advanced positioning system and safety features, make it a valuable asset for any offshore wind project.

The vessel's ultra-low-emission design and advanced exhaust gas purification system also make it an environmentally friendly option, which is critical for the offshore wind industry, which is committed to reducing its carbon footprint and minimizing its impact on the environment.

Future Deployment and Projects

The Voltaire is due to enter service in 2027 and will be deployed in RWE's offshore wind projects, such as the Thor project in Denmark and the Hollandse Coast West VII project off the coast of the Netherlands. The vessel's impressive lifting capacity and advanced positioning system make it an ideal choice for these projects, which require the installation of large and heavy wind turbines.

The Voltaire's ability to transport multiple wind turbine components in a single voyage will also help to reduce the number of trips required, increasing the overall efficiency of the operation and reducing the environmental impact of the project.

The Voltaire's future deployment is a significant milestone for the offshore wind industry, which is expected to continue growing in the coming years. The vessel's advanced capabilities and safety features make it an important asset for the industry, and its deployment is expected to play a critical role in the successful completion of several high-profile offshore wind projects.

As the offshore wind industry continues to evolve and grow, the Voltaire is likely to play an increasingly important role, helping to install the next generation of offshore wind turbines and reducing the carbon footprint of the industry.

With its impressive capabilities, advanced safety features, and ultra-low-emission design, the Voltaire is a game-changer for the offshore wind industry, and its future deployment is eagerly anticipated by industry professionals and stakeholders.

Next steps

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Market context for high-compliance maritime regions

For readers in the United States, United Kingdom, Canada, Australia, Singapore and Europe, World’s Biggest JackUp Vessel should be compared with regulator expectations, port-state control, class requirements, insurance and safety-management systems. The same maritime topic can have different practical meaning under USCG, MCA, Transport Canada, AMSA, MPA Singapore and European authority expectations.

Use the market links below to connect the article with local compliance, port-state, training and safety expectations in high-value maritime regions.