Cable Consultancy and Engineering

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OWC’s dedicated team of subsea cable experts provides the most comprehensive service offering to support the optimisation of subsea cabling infrastructure and grid connection solutions, reducing risk of cable failure and damage, and maximising efficiency and long-term project profit.   

Our services cover technical support for all types of cables throughout a project and asset’s lifecycle, with expertise across the full supply chain. We offer experience in cable design (electrical and mechanical), supply, transportation, installation, and commissioning of cables and cable protection systems. The team works closely with our geoscience specialists to provide effective cable burial and route risk assessments and installation analysis. We also offer detailed custom cable routing analysis including unusual installation conditions, dynamic cable fatigue analysis, cable stability analysis, cable pulling calculations and cable lay advice.  

With our in-depth knowledge, practical experience across the offshore wind farm value chain, and multi-disciplined engineering and project management expertise, OWC has significant experience as owner’s engineer on subsea cable projects, whether just for the cables scope of work or as part of the wider owner’s engineer scope of work for an entire wind farm project.  

Our experience covers more than 80 projects all over the world in varying environmental conditions. 

Market challenges

As demand for renewable energy grows, so too does the demand on subsea cabling and grid infrastructure. Effective energy transmission back to shore is a critical component of a project’s long-term commercial viability. Preparation and analysis of grid connectivity plans increasingly play a vital role in tendering and permitting processes. So too does advanced analysis and understanding of cable design and route planning to mitigate risks early on. As projects multiply, technology goes floating, and projects go further and deeper out to sea, risk profiles change, and turnkey solutions for optimised subsea infrastructure are key.  

Supply chain in demand, pushing up costs and availability of goods.

Pressure on onshore transmission points and existing grid infrastructure.

Increased risk to dynamic cabling structure.

Operations and maintenance challenges, including availability and cost of required goods.

Availability of expert personnel to support.

Our Solutions

Our solutions address support clients in addressing the increasing challenges and changing risk profile facing cable projects today. The wide range of technical services enables us to provide turnkey solutions to help clients achieve permitting success through to the development, engineering and construction, and in the optimised operations & maintenance of their assets, having a direct result on the bottom line of a project.  

Planning & Feasibility 

  • Site investigation 
  • Cable route analysis & design  
  • Ground modelling & GIS 
  • Permitting & stakeholder management support 
  • Technical due diligence 


  • Cable route feasibility studies  
  • Cable burial risk assessment  
  • Technical information to support planning 
  • CAPEX and OPEX estimation  
  • Cable parameter estimation 
  • Market & technology assessment  
  • RFI campaign and pre-procurement engagement  
  • Electrical concept design pre-FEED 
  • Digital inspection and modelling  

Engineering and FEED  

  • Geoscience survey 
  • Dynamic cables analyses 
  • Owner’s engineering, package management, PM support and design review & validation 


  • Cable lay and shore pull-in analysis 
  • Transportation & installation engineering  
  • Client reps  
  • Power cable installation  

Operations & Maintenance

  • Mooring analysis  
  • Cable protection studies 
  • Emergency cable repair 
  • Scour remediation 

OWC’s parent company ABL Group, combines energy, marine, engineering and digital solutions to support subsea cables throughout the life-cycle of a project and its value chain.  

The shared knowledge and expertise of our sister companies enable OWC to add value to our projects by possessing a complete understanding of the risk profile impacting cables at various stages of a project and applying lessons learnt to early phases for optimum results.  

  • Cable route planning and optimisation 
  • Enhanced cable burial risk assessment  
  • Tool selection and achievability 
  • Cable protection studies 
  • Cable lay, shore pull-in, and seabed stability Orcaflex analyses 
  • Cable lay vessel design and conversion 
  • Temporary cable lay vessel mobilisation incl. structural services from carousel integrations through to concept deck layouts, design and seafastenings for cable handling equipment  
  • Cable-soil studies  

Find out more >

  • Cable lay vessel suitability analysis 
  • Marine advisory 
  • Marine warranty survey at T&I and O&M 
  • Client Reps & Construction supervision  
  • Power cable installation MWS  
  • Owner’s engineering for cable T&I  

Find out more >

The value we bring

Market leaders in subsea cable engineering and consultancy.

Multi-disciplined experts, with in-house geotechnical specialists for seabed analysis and CBRAs.

Global presence with teams across 63 offices and 38 countries.

15+ Projects involving electrical design and advisory services.

60+ Interconnector projects completed worldwide.

Services and expertise to supply at every stage of a cable project life-cycle.

Check out our whitepaper

Cable Protection Systems and Submarine Cable Failures

Typical causes and remedies

By OWC’s Riccardo Felici and Daniele Caruso, 2022

According to 4Coffshore, around 4,600 subsea cables have now been laid and are serving offshore wind farms globally. Of the 4,600 around 10 incidents are declared annually, resulting in an average cable downtime of 100 days. In the past seven years, 90 subsea cable failures occurred totalling over EUR 350 million in insurance claims.

Questions? Get in touch

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