OMS Group has contracted Ulstein for the design and construction of two cable-laying vessels. The Ulstein SX252 vessels have been designed by Ulstein Design & Solutions AS and are scheduled for delivery from Ulstein Verft in 2028.
OMS Group provides subsea digital infrastructure. Ulstein designs and builds advanced offshore vessels. The contract, executed on 23 December 2025, is part of OMS Group’s fleet expansion strategy to meet surging demand for high-capacity submarine cable systems.
Ronnie Lim, Group Chief Executive Officer of OMS Group: ‘With global connectivity demand accelerating, fleet capacity has become a critical constraint for the industry. These vessels significantly enhance our ability to execute complex submarine cable installations reliably and at scale, positioning OMS Group strongly for the next phase of global digital infrastructure growth.’
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Focus on sustainability
The new vessels will be purpose-built to deliver not only superior installation capabilities, but also a key focus on sustainability and reducing carbon emissions. The vessels will feature cutting-edge engineering and operational efficiencies, ensuring the best possible deployment of subsea networks, with the lowest environmental impact available in the market.
‘By integrating our proven Ulstein X-Bow design with advanced technologies such as the Ulstein Power Variable Speed Generator (VSG), we deliver vessels that set new standards for operational efficiency and environmental performance in this market. These solutions reduce fuel consumption and emissions,’ says Gunvor Ulstein, CEO at Ulstein Group.
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Ulstein SX252
The Ulstein SX252 vessels are 130 metres long and 22 metres wide, with a capacity of up to 6500 tonnes of cable. Accommodation is provided for 75 persons. The vessels feature two large cable tanks, two spare-cable tanks, and a hangar that encloses the cable deck. On top of the hangar, there is a large open deck for ROVs and containers.
The vessel is also equipped with a 50-tonne A-frame with a towing winch for ploughing. The Ulstein X-Bow reduces motion, reducing wear on cables and cable equipment and enhancing safety and operational capability even in rough weather and high waves.
Picture: The Ulstein SX252 design for OMS Group (image by Ulstein).
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