UXO ID & Disposal

Developed in-house by N-Sea.

“We have created the most cost-efficient practice for the industry-wide management of unexploded ordnance (uxo) detection, identification, clearance and removal.”

Global developers of offshore energy infrastructure projects are often faced with the unanticipated challenge of UXO in their proposed projects – a substantial risk legacy of Wars and years of munition dumping on the seabed. 

Developed in-house by N-Sea, Magsense is a vertical gradiometer array specifically designed for highly accurate Unexploded Ordnance (UXO) campaigns.

The unique system has been designed to collect and record high resolution data in magnetically noisy subsea environments and hostile conditions, delivering unprecedented accuracy, greater efficiency, and enhanced safety in the detection of UXO.


UXO management is defined as three distinct activities:

  • geophysical survey to identify non-UXO and potential UXO objects
  • visual inspection to positively identify non-UXO or actual UXO objects
  • disposal as required of both non-UXO and actual UXO objects

We investigate and map potential targets with hi-res sonar, ROV or divers, and remove any confirmed UXO objects through an Explosive Ordnance Disposal (EOD) process. These operations are carried out offshore and near shore. We have the expertise and the experience to perform UXO management according to Dutch, German, and English law.


By combining geophysical survey activities with intervention activities, UXO detection and removal competencies within one company, N-Sea is proven to provide a powerful solution for customers faced with issues relating to the clearing of cable corridors for future windfarms and subsea installations.

N-Sea assures safety during UXO operations through:

  • thorough preparation and realistic planning
  • personnel trained to high safety standards
  • proper resources of vessels and equipment


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