Mariners are advised that survey operations are due to be carried out by the vessel NRH Katabatic at one wind turbine within the Gwynt y Môr Offshore Wind Farm off the North Wales coast during March 2026. A Notice to Mariners about these operations is summarised below and can be downloaded here.
Survey operations
The NRH Katabatic is due to be carrying out the survey of one turbine starting on the 31st of March. The survey will continue for approximately 1 day, subject to weather and sea conditions.
The survey location is listed below.
- G18E: 053°27.454’N 003°29.351’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
NRH Katabatic is a GRP catamaran survey vessel measuring 12m in length by 5m in width, with a white hull and a superstructure coloured white with an orange roof. The vessel details and a link to its present location are given below:
- NRH Katabatic: Survey vessel | Call sign MAMU2
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.
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:-
1. Heavy Lift Operations, March 2026
The MPI Adventure is due to be carrying out maintenance operations including heavy lift operations at five wind turbines, starting on the 18th of March.
The work will continue for approximately 14 days, subject to weather and sea conditions.
A Notice to Mariners about these operations is summarised below and can be downloaded here. The maintenance locations are listed below.
– F15E: 053°27.780’N 003°30.978’W
– F07J: 053°27.748’N 003°36.971’W
– J17F: 053°26.788’N 003°29.993’W
– M03L: 053°25.736’N 003°36.935’W
– D03R: 053°28.418’N 003°36.983’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.
2. 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.
The vessel will monitor VHF Channel 16 at all times.