Mariners are advised that survey operations are due to be carried out by the vessel Spectrum 3 at one wind turbine within the Gwynt y Môr Offshore Wind Farm off the North Wales coast during October 2026. A Notice to Mariners about these operations is summarised below and can be downloaded here.
Survey operations
The Spectrum 3 is due to be carrying out the survey of one turbine starting on the 3rd of October. The survey will continue for approximately 1 day, subject to weather and sea conditions.
The survey location is listed below.
- D05A: 53° 28.426’N 3° 35.684’W
The location, latitude and longitude of the wind farm and all of the turbines within it can be seen on the Kingfisher Awareness Chart here.
This work is being carried out under Marine Licence number 11/52/ML/4.
Vessel details
Spectrum 3 is an aluminium catamaran survey vessel measuring 19m in length by 6m in width, with a dark grey hull and a lighter grey superstructure an orange roof. The vessel details and a link to its present location are given below:
- Spectrum 3: Survey vessel | Call sign 2DXB6
When at the specified locations the vessel will be towing equipment and restricted in the ability to manoeuvre. Mariners are requested where possible to maintain a 500m exclusion area around the survey vessel.
The vessel will monitor VHF Channel 16 at all times.
Notices to Mariners
Mariners are advised that the following Notices to Mariners have been issued for the Gwynt y Môr windfarm and export cable and remain current:-
- Jack Up Vessel Operations, October 2026: this notice was issued in September 2026. It advises mariners that the jack up vessels Wind Server and MPI Adventure will be carrying out maintenance including heavy lifting at thirteen locations within the Gwynt y Môr Offshore Windfarm area. Further details including a link to the notice to mariners for these operations can be accessed here.
- Gwynt y Môr offshore windfarm: risk of cable exposure: this notice was issued in September 2021. It advises mariners that there are areas where cables may be exposed within the windfarm array, and that these areas are subject to change in response to tidal and weather effects on the seabed. The information in this notice, as well as links to advice on fishing near cables and renewable energy structures and links to the cable array map for the windfarm can be accessed here.
Please contact Jim Andrews, Fishery Liaison Officer by e-mail or phone (+44(0)7908-225865) if you have any queries or concerns about this notice.