TGS | Powered by 4C Offshore

4C is now TGS

We are excited to announce a significant milestone in 4C Offshore's journey. Our integration into the TGS family marks the beginning of a new era in offshore wind market intelligence.

Learn what this means for you!

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Construction and Heavy Maintenance Intelligence

Understand markets and drive growth.

Access the 4C Offshore WebApp, the powerful intelligence tool fuelled by offshore global wind market data and insights.

Global Data

In-House Specialists
Providing the leading offshore construction & heavy maintenance subscription.

A Decade of Data
Providing reliable data for 10+ years.

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CHM vessels


wind farms

A Growing Market

A rapidly increasing offshore wind forecast is driving demand for offshore vessels capable of installing, constructing and conducting heavy maintenance of offshore wind farms. There is 10GW of offshore wind capacity currently under construction and 270GW is expected to enter construction by 2030. Help your business leverage that growth.

The installation and maintenance sectors play vital roles in realising offshore wind farms and keeping them operating at full capacity. These sectors and their dedicated researchers rely on data and insights to inform strategy - from current projects and activity to forecasts and finances. Without it, businesses and other organisations are sailing into unknown waters, unprepared.

Imagine what you could do for your organisation with access to complete up-to-date Construction & Heavy Maintenance, featuring comprehensive vessel intelligence, including detailed information about foundations, project milestones, vessels and contracts awarded.

How we can help

4C Offshore has developed 4C Offshore, a comprehensive suite of reports, databases and online tools.

4C Offshore has developed 4C Offshore, a comprehensive suite of reports, databases and online tools. 4C Offshore allows us to create sector-specific subscriptions to help people gather intelligence to inform decisions, for example our Construction and Heavy Maintenance Intelligence subscription. Sector subscriptions are powered by wide-reaching data and insights to help organisations make informed decisions.

4C Offshore’s Construction and Heavy Maintenance subscription will enable you to:

  • Understand vessel suitability for installing and maintaining project components
  • Explore contractors’ quantified track records to understand their project experience and market presence
  • Target growth areas through market forecasts and supply/demand analysis
  • Investigate component trends to stay informed of future market developments.

What’s in the Construction and Heavy Maintenance subscription?

Online/Offline Databases

  • Exclusive information about 753 different vessels associated with construction and heavy maintenance
  • Current locations
  • Past, current and future records of vessel contracts
  • Pipelines
  • Specifications of vessels active in the sector
  • New vessels
  • Vessel upgrades
  • Key component data
    • Downloadable to Excel and refreshed every hour


  • Exclusive news straight to your inbox
  • Daily, weekly, fortnightly or monthly - you choose!


  • Access to charts, reports and webinars
  • Quarterly reports providing insights into key vessel utilisation, installation trends and updates, heavy maintenance activity, component trends and supply/demand forecasts
  • Covers demand for vessels, analysis of vessel activities, associated stakeholders, O&M and turbine and foundation installation rates.

Online Tools

  • Quantify track records and contract backlog and identify key market players through downloadable market share charts
  • Understand future trends with interactive component explorers
  • Assess market supply via the vessel pipeline tool
  • Quickly view current and future contracts by wind farm and operator
  • Check live vessel locations with the online offshore wind map

Why choose a Construction and Heavy Maintenance Subscription?

  • One-stop-shop for offshore sector data and insights
  • Reduce waste on time-consuming research
  • Access forecasts
  • Investigate component trends
  • Analyse supply and demand data including existing stakeholders
  • Understand contractors' project experience and market presence
  • Understand specific project timelines and lifecycle
  • Reveal business opportunities
  • Target growth areas
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