Jan De Nul Group has ordered two 6,000 ton Subsea Rock Installation vessels at AVIC Weihai shipyard in Weihai, China.
The vessels will be able to install rock at depths up to about 600 meters by means of a flexible fall pipe. An inclined fall pipe will enable accurate rock installation around structures such as offshore wind turbine foundations and Oil & Gas platforms.
The vessels will also act as a support vessel for a subsea trencher, for the burial of cables. In addition, a cable carrousel with related equipment can be installed on board, for placing cables on the seabed, the company informed.
To enable these functions, the diesel-electric vessel is provided with a DP2 system.
According to its design, the vessel will be able to accommodate 60 persons, all in single cabins. The vessel complies with the IMO Code for Special Purpose Ships, Jan de Nul added.
In the cable laying mode, the vessel can be equipped with a carrousel or with cable reels along with tensioners, chute and auxiliary equipment. An A-frame and ROV trencher can be deployed from the vessel for burial of the installed cables.
The two sister vessels will be delivered in 2017.
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