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!

Saint-Brieuc Offshore Wind Farm

28 May 2024: Update 29th May 2024: Iberdrola announced that the project had reached full commissioning. Update 11/03/2024: Ailes Marine has confirmed that 50% of wind turbines are operational and generating power. Commissioning of the OWF will look to be completed in spring 2024. Update 19/12/2023: Ailes Marine confirmed that the wind farm is being commissioned in stages, with 50% being operational in early 2024, and reaching 100% operational by end of Q1 2024. Update December 2023: As of 11th December 2023, there are still 3 turbines yet to be installed on site. Commissioning date unlikely to be end of 2023, but will only be slightly delayed if so Update 26/01/2023: Ailes Marine confirmed in a press release that commissioning is expected December 2023. Offshore construction to start in 2021 for commissioning in late 2023.
Fully Commissioned
496 MW
4C Offshore | Location Map: Lat(48.854) Lon(-2.537)

Subscribers can track wind farms on their dashboard.

General Information
Other Names
Projet éolien en mer de la Baie de Saint-Brieuc
Development Status
Fully Commissioned
Category or Round
Unlock with a freemium account
Unlock with a freemium account
Unlock with a freemium account
Unlock with a freemium account



Ailes Marines SAS

Ailes Marines SAS


Ailes Marines SAS

Ailes Marines SAS


Iberdrola Renovables Energia, S.A.

Iberdrola Renovables Energia, S.A.

Owner-Offshore Transmission

Réseau de Transport d'Electricité (RTE)

Réseau de Transport d'Electricité (RTE)

Offshore Construction Starts
Submitted For Consent
Consent Authorised
Financial Close
First Power
Full Commissioning
Unlock with a freemium account

Revenue Mechanism
Revenue Details
EUR 150/MWh (EUR 150/MWh)

How does the database work?

4C Offshore marine intelligence software provides you with exclusive access to a range of specialised services including the Global Offshore Wind Farm Database. 4C Offshore grants you exclusive access to online and offline databases, reports, newsletters, online tools and more.

There are three levels of access: Free, Freemium and Full. Freemium allows you to personalise notifications, use the search function and access more data.

You will need Full access to use the 4C Offshore interactive system, access reports, updates, news, downloads and more. To find out more about how 4C Offshore software works and the benefits of Full access, enquire below.

Sign up to Freemium Enquire about 4C Offshore
Power & Turbines
Windfarm Capacity
496 MW
Turbine Model
Unlock with a freemium account
Other Turbine(s) Used
Min. Turbine Capacity (MW)
Max. Turbine Capacity (MW)
Min. Number of Turbines
Unlock with a freemium account
Max. Number of Turbines
Total Turbine Height
Hub Height
Rotor Diameter
Foundation Type
Unlock with a freemium account
Foundations on Wind Farm
Foundation Comments

Location & Environment
Sea Name
English Channel
Unlock with a freemium account
Depth Range (Chart Datum)
Depth Range (Stated by Developer)
Distance from Shore (Developer)
Unlock with a freemium account
Distance from Shore (Computed)

Installation Base
Unlock with a freemium account
Ops and Maintenance
Unlock with a freemium account

Number of Offshore Platform(s)
Shared Platform Type
Grid Connection Point
Unlock with a freemium account
Cable Landing Point

Export Cables (AC & DC)
Number of Export Cables (AC)
Unlock with a freemium account
Average Length per Cable (AC)
Additional Requirements (AC)
Nominal Voltage (AC)
Number of Export Cables (DC)
Average Length per Cable (DC)
Unlock with a freemium account
Additional Requirements (DC)
Nominal Voltage (DC)

Nominal Voltage

Onshore Cables
Number of Onshore Cables
Average Length per Cable
Expected Life