Caernarfon Notice to Mariners 19/2025

Mariners are advised of the current positions of the Aids to Navigation listed below.

Yellow Highlight =

Change of position since last

Aid to Navigation	Depth (5 metres off correct side of AtoN, adjusted to CD).	Latitude	Longitude	Light
LLANDDWYN ISLAND SW ROCK BUOY S CARDINAL	8.5m	53ᵒ 07’.89 N	004ᵒ25’.15 W	Unlit
LLANDDWYN ISLAND NE ROCK BUOY S CARDINAL	2.02m	53ᵒ 08’.04 N	004ᵒ24’.47 W	Unlit
SAFE WATER MARK	7.64m	53ᵒ 06’.95 N	004ᵒ25′.14 W	L Fl.10s
C 1 STARBOARD	5.38m	53ᵒ 06’.96 N	004ᵒ24’.71 W	Fl.G.5s
C 2 PORT	0.34m	53ᵒ 07’.12N	004ᵒ24’.71 W	Fl.R.10s
C 3 STARBOARD	1.7m	53ᵒ 07’.23 N	004ᵒ 23’.88 W	Q.G
C 4 PORT	1.8m	53ᵒ 07’.12 N	004ᵒ22’.72 W	Q.R
GRAMPIAN CASTLE S CARDINAL	N/A	53ᵒ 07’.26 N	004ᵒ 22’.96 W	VQ(6)+LFl.10s
C 5 STARBOARD	1.93m	53ᵒ 07’.19 N	004ᵒ23’.37 W	Fl.G(2).5s
C 6 PORT	2.3m	53ᵒ 07’.16 N	004ᵒ21’.91 W	Fl.R.5s
MUSSEL BANK PERCH	5.59m	53ᵒ 07’.32 N	004ᵒ20’.92 W	Fl.R(2).5s
C 8 PORT	3.76m	53ᵒ 07’.63N	004ᵒ19’.43 W	Fl.R.3s
C 10 PORT	2.1m	53ᵒ 07’.95 N	004ᵒ18’.22 W	Q.R
C 7 STARBOARD	2.3m	53ᵒ 08’.14 N	004ᵒ18’.13 W	Q.G
C 12 PORT	3.03m	53ᵒ 08’.50 N	004ᵒ17’.38 W	Fl(2)R.10s
C 9 STARBOARD	3.58m	53ᵒ 08’.57 N	004ᵒ16’.88 W	Fl.G.2s
CHANGE BUOY S CARDINAL	2.19m on station 6.09m in channel	53ᵒ 08’.81 N	004ᵒ16’.72 W	VQ(6)+LFl.10s
SEIONT RIVER BIFURCATION	-1.21m	53ᵒ 08’.55 N	004ᵒ16’.79 W	Unlit
TRAETH GWYLLT STARBOARD	6.04m	53ᵒ 09’.29 N	004ᵒ16’.08 W	Fl(2)G.10s
C 13 STARBOARD	3.74m	53ᵒ 09’.54 N	004ᵒ15’.89 W	Fl(4)G.10s
C 11 STARBOARD	4.2m	53ᵒ 09’.88 N	004ᵒ15’.63 W	Fl(2)G.5s
C 14 PORT	7.38m	53ᵒ 10’.23 N	004ᵒ15’.41 W	Fl.R.5s
C TEMP		53ᵒ 10’.53 N	004ᵒ14’.67 W	FL(2)R.5s
C 9 STARBOARD PORT DINORWIC	1.29m	53ᵒ 10.69 N	004ᵒ13’.81 W	FL(3)G.10s

David John O’Neill
Harbwr Feistr Caernarfon Harbour Master