Siem Industries Orders Two Offshore Subsea Construction Vessels from China
Siem Industries has placed an order for two offshore subsea construction vessels (OSCVs) with China’s Fujian Mawei Shipbuilding, expanding its investment in specialized offshore energy infrastructure. The new vessels are scheduled for delivery in 2029 and 2030, adding advanced construction capabilities to the offshore support fleet.
Each vessel will feature a 400-tonne active heave compensated (AHC) subsea crane and an additional 50-tonne AHC subsea crane, designed to support subsea construction and offshore operations. These heavy-lifting systems will enable the vessels to handle demanding underwater construction tasks in offshore energy projects.
The vessels will measure approximately 145 metres in length and 27 metres in beam. Their designs are being developed by Sirius Design & Integration in collaboration with Siem Industries and the shipyard, with an emphasis on operational flexibility and energy efficiency.
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The vessels are intended to undertake a range of activities across the offshore energy sector. Their design priorities reflect the operational requirements of specialized subsea projects, where lifting capacity, vessel stability and efficient offshore support capabilities are important considerations.
Strategic Implications for the Offshore Energy Sector
The order represents a further investment by Siem Industries in the offshore subsea market, building on its experience in owning and operating specialized offshore vessels. The combination of heavy-lift crane systems and an energy-efficient design is intended to provide flexibility across a range of offshore construction and support requirements.
As offshore energy projects increasingly depend on complex subsea infrastructure, specialized vessels remain an important part of project execution. Siem Industries’ newbuild programme positions the company to expand its offshore capabilities when the vessels enter service, with deliveries planned for 2029 and 2030.
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