Caernarfon Notice to Mariners 01/2026
Aid to navigation C2 is not on its appropriate station.
53° 07’.13′ N 004° 24’.35 W
Mariners are advised to exercise caution in this area.
David John O’Neill
Harbwr Feistr Caernarfon Harbour Master
Sailing in Company since 1928
Aid to navigation C2 is not on its appropriate station.
53° 07’.13′ N 004° 24’.35 W
Mariners are advised to exercise caution in this area.
David John O’Neill
Harbwr Feistr Caernarfon Harbour Master
All mariners are advised that dredging operations will commence at Deganwy Marina on 01/03/2026. Dredging is carried out in accordance with marine licence DML 2322. A further Local Notice to Mariners will be issued advising the position of the lit outfall mark once the mark is laid.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
All mariners are advised that Local Notice To Mariners 03/2026 is hereby cancelled. Navigation mark C11 in the Conwy Harbour approach channel is now on station and lit.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
All mariners are advised that Local Notice To Mariners 16/2022 is hereby cancelled.
A new yellow conical special mark, with a 10 knot speed advisory, has been laid between C11 and the Perch. Coordinates are 053°18.055’ North 003°50.838’ West. The mark is lit with a yellow lantern, flash characteristic Fl Y 10s.
The 10 knot speed limit is a maximum and certain vessel hull types can still generate an excessive wash at speeds of 10 knots or less. It is a matter of both good seamanship and safety to ensure excessive wakes are avoided so as not to potentially endanger other harbour users.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
All mariners are advised that navigation mark C11 in the Conwy Harbour approach channel is temporarily unlit. A cancelation notice will be issued once the issue is rectified.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
All Mariners are advised that C2 is now back on station.
Local Notice to Mariners 21/2025 is hereby cancelled.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
Mariners are advised that the Swelly Rock South Cardinal is now lit.
53° 13’.16N – 04° 10’.45W
Notice to Mariners 33/2025 is hereby cancelled.
David John O’Neill
Harbwr Feistr Caernarfon Harbour Master
Mariners are advised that the Swelly Rock South Cardinal is unlit.
53° 13’.16N – 04° 10’.45W
Mariners are advised to navigate with caution in this area.
David John O’Neill
Harbwr Feistr Caernarfon Harbour Master
All Mariners are advised that C2 top mark is missing and unlit.
A further notice will be issued once repaired.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master
All Mariners are advised that a dredging campaign at Conwy Marina will commence on the 10th of November 2025 under the Marine Licence DML 1833v3.
A further notice will be issued with the position of the special mark which marks the dredging pipe outfall, once laid.
Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master