Committee of experts for offshore renewable energies environmental issues

Duration: Since 2018


Throughout the life of offshore renewable energy projects, from the initial application phase to decommissioning and in-service monitoring, legislation requires consideration of the potential impacts of these projects on the environment and the use of the marine environment. Numerous questions arise for stakeholders (French State, regional authorities, developers, consulting firms…) on the relevant environmental issues to be taken into account.

Since 2018, the COME3T initiative brings together a set of French ORE stakeholders to address environmental issues to a panel of neutral and independent experts. The questions addressed are based on the issues identified by the sector and on public questions about the integration of these new energies in the French context. It is this strong connection between the concerns of the various stakeholders that makes the approach original.


  • To provide elements of expertise, synthesis and recommendations on the identification of environmental priority issues for the ORE through the establishment of a lead neutral experts committee.
  • To install a French and unique network of experts that can be consulted by all ORE stakeholders.

Way of working

France Energies Marines has set up, finances and coordinates the COME3T approach by positioning itself at the interface between a steering committee and the panel of experts. The steering committee prioritises the themes to be dealt with, which are forwarded by the Institute to the expert panel. The experts go deeper into the raised topics and classifies them in three categories according to the associated environmental issues: 

  • No environmental issue identified,
  • Environmental issue identified, but sufficient level of knowledge,
  • Potential environmental issue and insufficient level of knowledge, requiring the launching of new studies.

Summary documents are written for each of the topic, providing scientific justification for this classification. They serve as a basis for the preparation of richly illustrated teaching bulletins and educational videos.

Treated topics

  • Can bottom-fixed wind farms generate dangerous waves?
  • Does the colonisation of ORE farms facilitate the introduction and spread of non-native species?
  • Can a relationship be assessed between the gains and losses to the marine ecosystem from reef effect induced by wind farms and their connection?
  • How to assess the effects of an operational wind farm on marine mammals?


Project sheet (PDF)

COME3T Bulletin N°2 – Non-indigenous species (PDF)

COME3T Bulletin N°1 – Dangerous waves (PDF)

Press release – 25/02/20 (PDF)


The COME3T steering committee brings together a wide range of stakeholders in the ORE sector.

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The expert panel brings together some 15 scientists who are divided into thematic working groups (e.g. oceanography, habitats, marine mammals).

Photo credit: Brook / AdobeStock

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