Caernarfon Notice to Mariners – Buoy Depths Q4 2025

Yellow Highlight =

Change of position since last

AtoN	Depth 5 Meters off correct side of AtoN e.g 1.5m @ 15:30	Depth (m) Adjusted to CD	Latitude	Longitude	Light Characteristic
LLANDDWYN ISLAND SW ROCK BUOY S CARDINAL			53°07.89’N	004°25.15’W	Unlit
LLANDDWYN ISLAND E ROCK BUOY S CARDINAL			53°08.04’N	004°24.47’W	Unlit
SAFE WATER MARK	15:56	7.32	53°06.96’N	004°25.11’W	L Fl.10s
C 1 STARBOARD	15:53	5.39	53°07.00’N	004°24.69’W	Fl.G.5s
C 2 PORT	15:49	0.65	53°07.13’N	004°24.35’W	Fl.R.10s
C 3 STARBOARD	15:45	2.50	53°07.23’N	004°23.88’W	Q.G
C 4 PORT	15:38	2.42	53°07.12’N	004°22.74’W	Q.R
GRAMPIAN CASTLE SOUTH CARDINAL	16:44	1.38	53°07.26’N	004°22.96’W	VQ(6)+LFl.10s
C 5 STARBOARD	15:41	1.54	53°07.19’N	004°23.37’W	Fl.G(2).5s
C 6 PORT	15:36	2.50	53°07.16’N	004°21.97’W	Fl.R.5s
MUSSEL BANK PERCH	17:14	3.84	53°07.32’N	004°20.92’W	Fl.R(2).5s
C 8 PORT	15:28	1.91	53°07.63’N	004°19.43’W	Fl.R.3s
C 10 PORT	15:21	3.32	53°07.95’N	004°18.25’W	Q.R
C 7 STARBOARD	15:19	2.80	53°08.13’N	004°18.02’W	Q.G
C 12 PORT	15:15	2.44	53°08.48’N	004°17.39’W	Fl(2)R.10s
C 9 STARBOARD	15:12	3.20	53°08.54’N	004°16.91’W	Fl.G.2s
CHANGE BUOY S CARDINAL	17:40	3.51	53°08.80’N	004°16.74’W	VQ(6)+LFl.10s
SEIONT RIVER BIFURCATION	15:08	-0.56	53°08.55’N	004°16.81’W	Unlit
TRAETH GWYLLT STARBOARD	17:44	3.21	53°09.27’N	004°16.09’W	Fl(2)G.10s
C 13 STARBOARD	17:48	1.91	53°09.53’N	004°15.89’W	Fl(4)G.10s
C 11 STARBOARD	17:50	3.31	53°09.88’N	004°15.63’W	Fl(2)G.5s
C 14 PORT	17:54	6.31	53°10.23’N	004°15.41’W	Fl.R.5s
C TEMP PORT	18:00	5.00	53°10.53’N	004°14.67’W	Fl(2)R.5s
PORT DINORWIC	–	–	53°10.69’N	004°13.81’W	Fl(3)G.10s

David John O’Neill
Harbwr Feistr Caernarfon Harbour Master
Ymddiriedolaeth Harbwr Caernarfon Harbour Trust