Archeological survey for the Nemo Link Project - BE

National Grid and Elia System Operator are jointly planning to connect the high voltage grid systems of the United Kingdom and Belgium through an HVDC electrical interconnector, the Nemo Link project. The 130 km subsea power cable runs from Richborough (UK) to Zeebrugge (BE) and across a French section of the North Sea of 23 km.

 For this project, G‐tec has performed a geophysical and magnetometric survey along the French section of the cable route. The aim of the survey was to detect and map possible hazards, debris and objects of potential archeological interest laying on the seafloor and buried metal objects.

This information will be the basis of the archaeological diagnosis which will be conducted by the French National Institute for Preventive Archaeological Research (INRAP). This is why G-tec has specifically designed its survey to meet the DRASSM’s specifications (French Submarine and Undersea Archeologic Research Department).

The following equipment has been deployed: a High frequency side scan sonar, a High resolution mutibeam echosounder, a MagWing (G-tec’s double gradiometer frame) and a drop-down camera.

 The resultant data provides Nemo Link Ltd supplementary information for the future cable laying works, another successful project for G-tec

Project Description Video

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