NYK Advances Design of Subsea Cable-Laying Vessel

Japanese shipping major NYK Line has completed the basic design of a new long-distance subsea cable-laying vessel intended to support the development of Japan’s future high-voltage direct current (HVDC) transmission network, marking a key milestone in a national effort to strengthen offshore renewable energy infrastructure.

The vessel’s design recently received General Design Approval (GDA) from classification society ClassNK, confirming that the concept meets relevant international conventions and classification rules at the detailed design level.

The project is part of Japan’s broader push to build an efficient subsea power transmission system capable of transporting electricity generated by offshore wind farms to major demand centers onshore. Long-distance subsea DC transmission—supported by specialized cable-laying vessels capable of jointing and burial operations—is seen as a critical component of that strategy.

Part of National HVDC Technology Development Program

The vessel design work is being conducted under Japan’s RIGHT Project, a research initiative led by New Energy and Industrial Technology Development Organization aimed at advancing high-voltage direct current transmission technologies for renewable energy integration.

Within the program, NYK is part of a four-company consortium that includes Sumitomo Electric Industries and Furukawa Electric. The partners are working to develop advanced cable protection methods as well as