UXO Identification, Clearance & Disposal

Unexploded ordnance (UXO) continue to pose a real risk to site developers, contractors, and asset owners, even long after periods of inactivity, with the potential to impede the safe and timely completion of projects.

Our comprehensive solution aims to mitigate these risks efficiently, to safeguard schedules and enable the arrival of heavy lift assets and cable lay support vessels on site. Our clients can be confident that the site has been prepared in advance, and the threat of UXO eliminated.

Combining our advanced range of ROVs, industry knowhow, and market-leading sensors, we deliver valuable insights into the marine environment and work with our clients to develop a customised mitigation strategy to address the risks posed by UXO threats. We aim to ensure safe, timely removal of these hazards. We bring schedule efficiencies that ultimately reduce the time to completion and first power.

With extensive experience in both ferrous and non-ferrous target identification, we deploy technology that can significantly reduce the number of potential unexploded ordnance (pUXO). With this insight, and working closely with our geophysicists and assigned UXO consultants, removal from scope of up to 65% of false targets has been realised, significantly reducing the subsequent requirement to dredge and visually inspect.

With hundreds, and often thousands, of potential targets to investigate and report on, keeping track of all of the data associated with each target can be an administrative burden and extremely time consuming. Our data platform, Atlas, tracks and keeps tabs of every target, perfectly mapped in a GIS format. With a simple click on the site map on the object of interest, you have instant access to safely and securely stored records and reports to aid in closing out the master target list, which also supports in obtaining ALARP sign-off certification.

Providing a seamless solution, we work closely with trusted UXO disposal specialists, to ensure environmentally friendly, low order and safe UXO deflagration and disposal, minimising marine disturbance and noise that can be harmful to marine mammals.

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Pre and Post-lay Surveys

We specialise in conducting thorough pre-lay surveys, incorporating state-of-the-art geophysical and geotechnical equipment, accompanied by thorough video inspections. Our ultra high-resolution data enables our clients to assess seabed conditions accurately before cable installations take place.

Following installation, we offer post-lay surveys to ascertain the exact position and ongoing condition of cables. By employing advanced surveying techniques and equipment, we deliver data insights that enable our clients to determine the precise location and assess the overall health of cables, ensuring their integrity and performance.

Our surveys utilise ultra high-definition video footage, high-resolution bathymetric data, as well as accurate relative cable depth of burial assessments using acoustic imaging systems.

From beneath the seabed to the bellmouth entry. See your components in a real world 3D digitised environment. Precise live subsea metrology allows freespans to be measured, cable shape to be plotted to ensure no overbend, scour to be referenced for future trending and cable protection systems to be verified as installed correctly.

At Rovco, we recognise the criticality of these surveys in ensuring the successful deployment and ongoing operation of offshore wind farms. With our expertise and cutting-edge technology, we deliver comprehensive and reliable pre and post-lay survey solutions, helping our clients make informed decisions and maintain the efficiency and reliability of their offshore wind installations.

Cable Depth of Burial

Rovco provide cable depth of burial surveys along with accurate plotting of route position logs through the combined use of our positioning survey services. Precise and accurate depth of burial information is essential for cable security and a reduction in cable maintenance costs.
We have experience in the use of TSS440, TSS350, PanGeo SBI, and will soon be trialing the new TSS660. Depending on the expected cable depth and vessel requirements, we can mobilise using small, medium or workclass ROVs.

As-left Condition Reporting

As-left condition reporting plays a crucial role during the construction phase of offshore wind developments. We deliver unparalleled as-left surveys to document the as-built condition of subsea assets once construction is complete, which serves as a reference point for future operations and data trend analysis, maintenance, as well as regulatory compliance.

Offshore wind developments involve complex engineering and construction processes, and our as-left surveys ensure that the constructed infrastructure aligns with the original design plans and specifications, ready for hand over into operations. Our in-house experts employ industry-leading techniques and technology to deliver the highest quality data and reporting, meticulously capturing the positions and dimensions of key elements such as scour, cathodic protection systems, Anodes, Cable protection systems, coating damage and marine growth.

By comparing the as-built data with the initial design, project stakeholders can identify any discrepancies or deviations that may have occurred during construction. This information is invaluable for quality control, risk assessment, and ensuring compliance with regulatory requirements. It also aids in the resolution of disputes, if any, between contractors, developers, and other parties involved in the project during handover and into warranty for defect remedy.

Harnessing the power of SubSLAM X2 technology, our industry-leading 3D reconstructions are generated in real time whilst simultaneously capturing ultra high definition 4K video footage. This provides a permanent snapshot in time, contributing to the long-term management of offshore wind farms. The collected data serves as a baseline for future inspections, repairs, and maintenance activities, enabling asset owners to assess structural integrity, monitor changes over time such as marine growth type and volume generation, anode volume depletion over time, change in scour. This trend analysis allows for easy assessment of performance of key components and supports plans for upgrades or modifications.