Brave Tern remains under detention by the Danish Maritime Authority after a port collision in Esbjerg damaged wind turbine components allocated to the Thor offshore wind farm.

The incident occurred during a harbor maneuver involving the Fred. Olsen Windcarrier installation vessel. Local reporting cited the authority as saying wind pushed Brave Tern off course, causing it to make contact with Wind Keeper, a Cadeler vessel moored at the quay. The dockside was also struck during the event.

The Danish Maritime Authority is carrying out onboard inspections and reviewing whether the vessel itself sustained damage. The condition of the cargo is also being assessed.

RWE, the owner and developer of Thor, confirmed that components carried on Brave Tern hit another vessel and the quayside at the Port of Esbjerg. No injuries were reported from the collision, although one person was taken to hospital for a medical check-up.

The company said the cause of the incident and the level of damage to the vessel and cargo remain under investigation.

Local media reported that nine turbine blades were onboard Brave Tern at the time. South and South Jutland Police attended the scene and linked the incident to wind and weather conditions.

No update has been issued on whether the accident will affect the construction timeline for Thor.

Brave Tern installed the first turbine at Thor in March this year. The project is located about 22 km off the west coast of Jutland and delivered its first power shortly after installation began.

The 1.1 GW Thor offshore wind farm is planned with 72 Siemens Gamesa SG 14-236 DD turbines, each rated at 15 MW. Installation is scheduled for this year, while full commissioning is planned for 2027.

Wind Keeper, acquired by Cadeler in 2025, had been upgraded for 15 MW turbine installation work. The vessel was previously reported to have started its first project at Germany’s 960 MW He Dreiht offshore wind farm.