Why is the construction of this cable-laying vessel significant for the energy transition?

Subsea cable-laying vessels are the primary bottleneck in connecting offshore wind farms and international power grids. Adding an ultra-large CLV to the global fleet helps ease this supply chain constraint, accelerating the deployment of offshore renewable energy and cross-border electricity interconnectors.

Why did a South Korean company choose a Turkish shipyard for this project?

Turkish shipyards, particularly Tersan, have established a strong global reputation for building highly customized, technologically advanced offshore vessels at highly competitive prices compared to Western European yards. This allows East Asian firms to secure high-quality assets while optimizing capital expenditure.

What specific capabilities will this new vessel have?

The vessel will feature ultra-large carrying capacities for heavy high-voltage cables, state-of-the-art dynamic positioning systems to maintain stability in rough seas, and advanced subsea burial equipment to protect cables on the seabed.

Offshore Energy · July 6, 2026 (Jul 6) · 1 min read

South Korean ultra-large cable laying vessel enters construction in Türkiye

Analysis

AI-assisted analysis · reviewed by Yuri Kan

The commencement of construction on a new ultra-large cable-laying vessel (CLV) at Turkey's Tersan Shipyard marks a significant expansion of global offshore infrastructure capacity. This specialized vessel, commissioned by a South Korean entity, highlights the surging demand for subsea high-voltage direct current (HVDC) cabling driven by the global offshore wind boom and cross-border grid interconnectors. The project underscores Turkey's growing prominence as a high-tech shipbuilding hub capable of delivering complex, specialized offshore energy vessels.

Key Facts

Turkey's Tersan Shipyard has officially cut the first steel, signaling the start of construction for a new ultra-large cable-laying vessel (CLV).
The vessel is being built for LS Cable & System, a major South Korean cable manufacturer, to support its global offshore wind and subsea power transmission projects.
The state-of-the-art vessel will be equipped with a high-capacity cable carousel, advanced dynamic positioning (DP2) systems, and a dedicated ROV (Remotely Operated Vehicle) hangar.
Upon completion, the vessel will be one of the largest and most technologically advanced cable-layers in the world, designed to operate in challenging deepwater environments.
This construction contract reflects the growing trend of East Asian energy giants outsourcing high-spec vessel fabrication to Turkish shipyards due to competitive pricing and technical expertise.

Background & Context

The global transition toward renewable energy has triggered an unprecedented demand for subsea cabling infrastructure to connect offshore wind farms and link national power grids. Historically, the cable-laying market has faced a severe bottleneck due to a shortage of specialized, high-capacity vessels capable of handling modern, heavy HVDC cables. Shipyards in Europe and Asia are increasingly backlogged, prompting developers to secure construction slots years in advance to avoid project delays.

Market Impact

This development will directly alleviate the supply-chain constraints plaguing the offshore wind and subsea interconnector sectors by adding critical installation capacity. For Tersan Shipyard and the Turkish maritime sector, this project solidifies their reputation as premier builders of complex, non-cargo offshore vessels, competing directly with Northern European yards. For LS Cable & System, owning an ultra-large CLV secures operational independence, reducing their reliance on third-party charter markets where vessel day-rates have skyrocketed.

What to Watch

The next major milestones to watch include the keel-laying ceremony, followed by the installation of the specialized cable-handling equipment and carousel systems. The vessel is expected to undergo sea trials before its scheduled delivery, after which it will immediately deploy to major offshore wind or interconnector projects in the Asia-Pacific or European markets.

Why This Matters for Cyprus

While this specific vessel is built for a South Korean firm, the expansion of the global CLV fleet is highly relevant for the Eastern Mediterranean, where mega-projects like the Great Sea Interconnector (connecting Greece, Cyprus, and Israel) face chronic challenges in securing available cable-laying vessels. Increased global vessel capacity ultimately lowers mobilization costs and scheduling risks for deepwater grid integration projects in the Cypriot Exclusive Economic Zone.

Frequently Asked Questions

Why is the construction of this cable-laying vessel significant for the energy transition?: Subsea cable-laying vessels are the primary bottleneck in connecting offshore wind farms and international power grids. Adding an ultra-large CLV to the global fleet helps ease this supply chain constraint, accelerating the deployment of offshore renewable energy and cross-border electricity interconnectors.
Why did a South Korean company choose a Turkish shipyard for this project?: Turkish shipyards, particularly Tersan, have established a strong global reputation for building highly customized, technologically advanced offshore vessels at highly competitive prices compared to Western European yards. This allows East Asian firms to secure high-quality assets while optimizing capital expenditure.
What specific capabilities will this new vessel have?: The vessel will feature ultra-large carrying capacities for heavy high-voltage cables, state-of-the-art dynamic positioning systems to maintain stability in rough seas, and advanced subsea burial equipment to protect cables on the seabed.

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