There is a growing global demand for the protection of subsea infrastructure that supports the production and transmission of energy and data. To meet that demand, Jan De Nul has ordered a new dedicated vessel for subsea protection: the George W. Goethals.
Thousands of kilometres of subsea cables lie on the ocean floor, transporting electricity between countries, connecting offshore wind farms to the mainland, and carrying the bulk of international data traffic. But they are vulnerable to damage and, due to their strategic importance, potential targets for sabotage. With a new state-of-the-art rock installation vessel, Jan De Nul seeks to enhance the protection of this critical infrastructure.
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Reliable energy system
The new vessel, named George W. Goethals, will primarily focus on projects in the energy sector. With numerous energy projects under development in the North Sea and Southeast Asia, these regions will form the core of its operational activity. The vessel has a capacity of up to 37,000 tonnes. With a flexible vertical fall pipe and an inclined fall pipe system, the vessel can install extra-large rocks to water depths of up to 400 metres.
Philippe Hutse, Director Offshore Energy at Jan De Nul: ‘A cutting-edge vessel like this represents a major investment and a carefully considered decision. As world builders, we are fully committed to create a reliable energy system worldwide. Protecting the infrastructure that supports offshore energy production and transmission is essential to achieve this goal. With this new vessel, we are shifting into a higher gear to meet that challenge head-on.’
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Designed in-house
The George W. Goethals will become the third rock installation vessel above 30,000 tonnes in the fleet of Jan De Nul. Designed entirely in-house, the vessel reflects the company’s experience in protecting offshore infrastructure.
‘Decades of hands-on experience have given us deep expertise in subsea rock installation,’ states Hutse. ‘We have applied this knowledge throughout the vessel’s design. The collective capacity of our subsea rock installation fleet now surges beyond 100,000 tonnes.’
ULEv, biofuel and methanol
The vessel will be an Ultra-Low Emission vessel (ULEv). ULEv is a highly advanced dual exhaust filter system that removes up to 99 per cent of nanoparticles from emissions using a diesel particulate filter and a reduction system for nitrogen oxides (NOx). The system also significantly reduces exhaust gas pollutants.
With this technology, the vessel complies with the strict European Stage V emission standards for inland waterway vessels. Moreover, the NOx emissions are reduced to such an extent that this vessel meets the even stricter EURO VI emission limits.
The engines of the vessel can run on biofuel and green methanol, which significantly reduces CO2 emissions. The hybrid power plant on board also contributes to the reduction of CO2 emissions and optimal fuel usage. It combines the generators with a battery and drive technology, designed for peak shaving, load smoothening, spinning reserve and optimised engine loading.
The vessel will be equipped with four electric excavators. Among other applications, they will be used for loading large-sized rocks, enabling efficient operations without the need for a dedicated conveyor belt or crane on shore.
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Cable-layers under construction
Besides the new rock installation vessel, Jan De Nul is also building two extra-large cable-laying vessels, the Fleeming Jenkin and the William Thomson. Each vessel will have a cable-carrying capacity of 28,000 tonnes — more than any other vessel currently on the market.
They are designed to install cables over longer distances with fewer subsea connections, making them ideal for interconnector cables that link energy grids across the globe. These cables enable electricity to flow quickly from areas of surplus to areas of demand, enhancing the reliability of renewable energy.
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Who was George W. Goethals?
George Washington Goethals (1858–1921), the son of Belgian immigrants, was an American military officer and civil engineer best known for overseeing the construction and opening of the Panama Canal. The Panama Canal connects the Atlantic and Pacific Oceans and is therefore an important trade route. From 2009 to 2016, Jan De Nul took part in the construction of the third set of lock complexes in the Panama Canal.
Picture (top): 3D image of the next-generation rock installation vessel Jan De Nul ordered. This image shows the vessel installing rock on top of a subsea energy cable (image by Jan De Nul).
