Compensation measures

Improving the tranquility of marine mammals

Objectives and methodology

The purpose of this measure is to enhance the tranquility of marine mammals in the Gulf of Normandy Breton during the construction phase of the wind farm off the coast of Saint-Brieuc Bay.

Several meetings have been organized with the services of the State, and experts on marine mammals, during 2019 and early 2020.

The species targeted by this awareness program are the main cetacean and pinniped species found in the Gulf of Normandy Breton, namely the bottlenose dolphin, common dolphin, Risso's dolphin, porpoise, seal calf and grey seal.

An awareness zone, active from March 2021 to October 2023, will support targeted awareness actions.


The actions will aim to improve the image and knowledge of the behaviour and lifestyle of marine mammals in order to better protect them. The information disseminated will also aim to raise awareness among sea users of the respectful approach to marine mammals in the event of accidental encounters.

Several awareness-raising tools are being developed:

Creation of a booklet whose content was discussed with the State services and experts previously mentioned.

The production of a short awareness-raising video is also envisaged.

Numerous relays along the coast have been identified for the implementation of this measure.

Location of actions


Figure SEQ Figure \* ARABIS 2: Marine Mammal Awareness Area

While the eastern part of the bay is the subject of active outreach, notably by Al Lark, the western part of the bay is less subject to outreach around marine mammals and will therefore be mainly targeted for Ailes Marines actions.

Planning and Status


Measure put in place


  • In the pre-construction phase 87% 87%


  • In the construction phase 0% 0%

2024, 2025, 2026, 2034, 2044

  • In the operational phase 0% 0%

All compensation measures

Follow-up actions

Reduction measures

Accompanying measures