For the Farasan-Madayah Submarine Cable Project, deugro China, deugro Saudi Arabia, deugro Chartering, and the engineers from dteq Transport Engineering Solutions transported almost 110 kilometers of 132 kV CTS submarine cables from China to the Port of Jazan, Saudi Arabia.
The subsea cables were collected at the Port of Changshu, China. To ensure their timely delivery to the Port of Jazan, a suitable deck carrier was required to safely accommodate and transport both the cables and the cable carousel, which had a combined weight of more than 5,380 metric tons and dimensions of 25 x 25 x 9.6 meters.
During a review of the original overall longitudinal strength calculations, dteq's engineers identified that the highly concentrated weight of the submarine cable caused the proposed loading condition to fall outside the required acceptance criteria. In close coordination with the barge design institute, and based on technical guidance provided by dteq's engineers, the allowable still-water bending moment and shear force values were re-evaluated and optimized to reflect the actual loading conditions. Using this revised calculation methodology, the overall longitudinal strength was subsequently verified as compliant with all transport safety requirements.
The concentrated cable load further imposed pressure on the local deck structure. By placing small steel shims beneath the cable support areas, the load was transferred to the primary load-bearing members-namely the deck longitudinal girders and transverse beams. This multi-point load dispersion approach ensured that local deck stresses remained within permissible limits.
Following the successful carousel installation, the deck carrier was repositioned to the supplier's loading terminal, where the cables were spooled directly from the quayside onto the carousel. After 10 days, the subsea cables were safely stowed and secured for ocean transport, enabling the vessel to depart for Saudi Arabia on schedule.
Upon arrival at the Port of Jazan, the cables were delivered on schedule under the coordination of deugro Saudi Arabia's experts, ensuring that the project's cable-laying operations remained on track.
“The safe and timely delivery of this critical subsea cable project is another example of deugro’s ability to deliver complex cable logistics solutions. It further reinforces deugro’s position as a trusted logistics provider for the global cable industry and highlights the value of our integrated project solutions approach,” said Erwin Visser, Manager, Subsea Cable Logistics
“The Farasan–Madayah Submarine Cable Project is a great example of how local client engagement combined with global expertise can create real value for complex infrastructure developments. From the early tender stage through engineering, vessel chartering, and final delivery to Jizan, our teams worked closely across multiple regions to ensure a seamless execution. We are particularly proud of the strong contribution from our China organization, which acted as the bridge between the client, manufacturing facilities, and global project teams. This achievement reflects our commitment to delivering reliable logistics solutions for the energy transition and supporting Saudi Arabia's long- term infrastructure ambitions,” said Justin Zhu, Head of Sales and Business Development China, at deugro China.
