Totnes Sub-Aqua Club | Positions, depths and slack water times

Here is a list of positions, depths and slack times for some dive sites in South Devon and beyond. If you have any additions or amendments to make to this list then please email the diving officer.

Note that slack water times are relative to high tide at the specified port. All positions expressed to three decimal minutes are WSG84 positions which have been verified by Totnes BSAC. Other positions are older and may be expressed to two decimal minutes or in degrees, minutes and seconds.

Slack times quoted are the beginnings of the slack. The duration of the slack is often dependent on whether the tides are Spring, Neap or in between. If it is important then this can be worked out with Tidal Diamonds on the relative chart.

HW Torbay is HW Devonport +35mins
HW Dartmouth is HW Devonport +30mins
HW Salcombe is HW Devonport + 10mins

Name	Position	Depth	Slack before HW (hrs)	Slack after HW (hrs)	Duration (mins)	Port	Comments	Type
Aircraft at Challaborough?	50 16.420 - 03 54.830	20						South Devon reef
Alternative Rutts	50 13.740 - 03 57.330	18 - 34						South Devon reef
The Ambassador	50 11.529 - 03 49.782	51	1.5 - 2.0 (neap) 2.5 - 3.0 (springs)	3		Salcombe	Similar to Skaala. Note that slacks vary according to neap or springs	South Devon wreck
Anchor Reef	50 12.714 - 03 54.533	30 - 45						South Devon reef
Ann Marie	50 27.38N - 003 27.34W	27	2	3		Torbay		Lyme Bay wreck
Barge	50 16:32 - 04 01:85	?						South Devon wreck
Barn Pool		5-40	HW	HW	45-75	Devonport	Slack is -30 to +15 on springs; -45 to +30 on neaps	South Devon reef
Baychattan	50 11.443 - 03 42.110	60		3-4		Salcombe	There's no slack before HW	South Devon wreck
Benton Castle		35	2	3		Dartmouth	Best viz after HW	South Devon wreck
Berry Head dropoff		35	2	4		Torbay	Best done at slack.	South Devon reef
Blackstone point	50 17.537 - 04.03.474	12-24						South Devon reef
Bleamoor	50 22.45N - 003 25.18W	43						Lyme Bay wreck
Boma	50 32.163 - 03 14.330	33						Lyme Bay wreck
The Bretagne	50:29:490 - 03:22:698W	25	2	4		Torbay	Diveable at many states of the tide, but best on slack after HW	Lyme Bay wreck
Burgh Island	50 00.41N - 05 07.34W	25				Challaboro'	Diveable at any state of the tide	South Devon reef
Cantabria		10				Salcombe	Calm water is needed for this dive - any swell ruins the dive	South Devon wreck
Cattons (5 mile reef)	50 09.647 - 03 53.556	30 - 60						South Devon reef
The Charlwood	50 11.431 - 04 22.106	63						South Devon wreck
City of Swansea	50 28.52N - 003 11.25W	40						Lyme Bay wreck
Cod Rock		20+				Torbay		South Devon reef
Dartmouth Submarine		52	2.5	3.5		Dartmouth	Best viz on slack after HW	South Devon wreck
Dartmouth Tug		15				Dartmouth		South Devon wreck
Devil's Point		35	HW	HW		Devonport	Slack is -30 to +15 on springs; -45 to +30 on neaps	South Devon reef
Draystone		15-25	2	2		Devonport		South Devon reef
Dudley Rose	50 23.41N - 003 26.24W	35	2	4		Torbay	Poor slack/viz on before HW slack	Lyme Bay wreck
Dutch Tug	50 20.250 - 03 31.283	17						South Devon wreck
Earlstone		0						South Devon reef
East Rutts	50 13.459 - 03 58.907	12-40	2.5?	2.33		Salcombe	If not slack then be careful which side of the Rutts you place your divers	South Devon reef
Eastern Blackstone		0-30	2	3		Dartmouth	Usually a sheltered place somewhere	South Devon reef
Eastern Kings		10-30	HW	LW		Devonport	Diveable in most states of weather. Slack is -30 to +15 on springs; -45 to +30 on neaps	South Devon reef
Eddystone Lighthouse	50 10.900 - 04 15.680	8-40	3-4	2-3		Devonport	Diveable somewhere at any state of the tide	South Devon reef
Eddystone SE pinnacle	50 10.807 - 04 15:729	12-45						South Devon reef
The Elk	50 18.427 - 04 10.314	32	3	3		Devonport	Diveable at most states of the tide, but best at HW & LW	South Devon wreck
Elk Reef		0				Devonport		South Devon reef
Elsa		40+	2			Dartmouth	Can be dark	South Devon wreck
Empress of India		44	1	5		Devonport		Lyme Bay wreck
Fairyland trawler	50 17.698 - 04 04.127	20						South Devon wreck
Foyle	50 16.734 - 04 10.870	47	3	3		Devonport		South Devon wreck
Galicia	50 33.18N - 003 26.22W	20				Teignmouth	Diveable at any state of the tide	Lyme Bay wreck
Gammon Head		0				Salcombe		South Devon reef
Glen Strathallan	50 18.955 - 04 07.673	15				Devonport		South Devon wreck
Glocliffe	50:27:139 - 03:17:379	40	2	4		Dartmouth		Lyme Bay wreck
Greatham		46	2	3		Dartmouth	Best viz on slack after HW	South Devon wreck
Greeleen	50 27.41N - 003 13.51W	43	2	4		Devonport		Lyme Bay wreck
Hand Deeps	50 12.586 - 04.20.391	10-40	3-4	2-3		Devonport	Experienced divers could drift dive at any state of neap tide	South Devon reef
Hat Rock		20-60	3-4	2-3		Devonport		South Devon reef
Hellopes	50 04.26N - 05 29.32W	41						SW Cornish wreck
The Herzogin Cecile		7				Salcombe	Diveable at any state of the tide. Can be strongish currents at eastern edge of the bay.	South Devon wreck
Hay Tor Reef	50 10.624N - 03 54.197W	30 - 45	2 neapish			Devonport	Probably similar to Ambassador. Reef very exposed to tidal streams.	South Devon reef
Hillsea - Fairyland	50 17.696 - 04 04.158	8-30						South Devon reef
Hilsea Pinnacles		6-30	3	2-3		Devonport	Complete slack at -2 to -3 on neaps. Dive on slack.	South Devon reef
Hilsea Point	50 17.334 - 04.02.728	8-30	2-3	2-3		Devonport	HW + 4 gives good 0.5-1.0 knot drift.	South Devon reef
Ilston	49 57.12N- 05 09.43W	50						SW Cornish wreck
James Eagan Layne		12-26				Devonport	No strong currrents.	South Devon wreck
Jebba	50 14.067 - 03 51.750	10						South Devon wreck
Kendal Castle		49	2	3		Dartmouth		South Devon wreck
Knap Shoal		10-20	2-3	2-3		Devonport	All drift dives	South Devon reef
London Bridge		10				Torbay	Diveable at any state of the tide	South Devon reef
Lord Stewart	50 29.37N - 003 16.60W	34	2	4		Torbay		Lyme Bay wreck
The Louis Shied		10				Challaboro'	Diveable at any state of the tide	South Devon wreck
M2 submarine	50 34.607 - 02 33.981	35		4		Portland		Lyme Bay wreck
The Maine	50 12.750 - 03 50.960	35	3	3	40	Salcombe	Really need neaps for this. Currents can vary from surface to bottom.	South Devon wreck
The Medina	50 12.425 - 03 32.251	50 - 65	2-3	3-4		Salcombe	Vis variable. Lies N - S with bow facing S. No scour.	South Devon wreck
Medoc	50 15.140 - 04 14.286	55	2-3	3-4		Plymouth	3-4 hrs after HW is the better (ie. weaker) slack	South Devon wreck
Mewstone Dropoff		25-40	2	2		Devonport	Diveable at any state of tide on neaps. Better viz on flood	South Devon reef
Mewstone Ledges		10-30	2	3		Devonport		South Devon reef
Modavia	50 23.25N - 003 01.54W	50						Lyme Bay wreck
Mohegan	50 02 773N - 05 02 803W	15-25						SW Cornish wreck
Mohegan - boiler	50 02 768N - 05 02 636W	15-25						SW Cornish wreck
Morris Rogue		6-14				Torbay	Currents are usually quite slight	South Devon reef
The Newholm	50 12.577 - 03 38.530	44	3.5	4		Salcombe	Short slack before HW. Neaps advisable. Currents vary through the water column	South Devon wreck
Nice Reef	50 12.534 - 03 56.535	22 - 36						South Devon reef
Northville	50 24.27N - 003 24.37W	41	2	4		Torbay	Poor slack/viz on before HW slack	Lyme Bay wreck
Oregon	50 14.706 - 03 56.389	35		2.5		Challaboro'		South Devon wreck
Paddle Steamer		22				Salcombe		South Devon wreck
Perrone	50 28.16N - 003 22.51W	30						Lyme Bay wreck
The Persier	50 17.102 - 03 58.122	32				Challaboro'	Diveable at any state of the tide, but some current on springs	South Devon wreck
Pete's Patch	50 18.183 : 04 07.215	15 - 25						South Devon reef
Picton Castle		37	2	3		Dartmouth	Possible to dive 2 hours either side of slack on neaps. Best on flood	South Devon wreck
Placidas Farroult		12		0.5	30	Dartmouth	Slack 30 min after HW or LW. Best dived on rising tide or HW slack	South Devon wreck
Plymouth Drop off	50 17.628 - 04 08.750	30 - 42						South Devon reef
Poulmic	50 19.193 - 04 09.696	18-22	2	2		Devonport		South Devon wreck
Prawle Point		18-30				Salcombe		South Devon reef
Princess Royal	50 19.27N - 05 20.05W	40						SW Cornish wreck
The Rame Head Barge	50 18.368 - 04 14.765	34						South Devon wreck
The Riversdale	50 11.777 - 03 44.143	42		3	30	Devonport	Doesn't appear to be a slack before HW. Tidal flows can vary from surface to bottom. Springs not advisable.	South Devon wreck
Rosehill	50 19.790 - 04 18.538	35	3	3		Devonport	Slack not critical?	South Devon wreck
Rota	50 24.59N - 003 18.54W	46						Lyme Bay wreck
Sevilla	50 24.13N - 003 22.55W	42						Lyme Bay wreck
Shagstone		5-15				Devonport	Strongest tidal streams before & after HW, but never that bad	South Devon reef
Shoal Ground	50 11.709 - 03 50.251	25	2					South Devon reef
Shoal Ground dropoff	50 11.672 - 03 49.923	28 - 40						South Devon reef
Skaala	50 11.759 - 03 49.684	45	3	3		Salcombe	Arrive early and wait for slack. Long slack on neaps (+3 to +4, or more). See Ambassador	South Devon wreck
Soudan	50 12.540 - 03 46.585	22	HW	HW	20	Salcombe	Slack at HW & LW	South Devon wreck
Starling Drop	50 12.280 - 03 46.763	25	5	2		Salcombe	Site subject to exposed currents	South Devon reef
Start Point		9-15	HW	HW		Salcombe	Diveable at any state of the tide in the shallows near shore	South Devon reef
Start Race		24-35		3		Salcombe	Strong tidal race up to 4 knots	South Devon reef
Stoke Point Barge	50.16.417 - 04 01.960	41						South Devon wreck
Stoke Reef	50 17.233 - 04 01.333	30						South Devon reef
Submarine - Dartmouth	50:19:95 - 03:29:83	50						Lyme Bay wreck
The Bull		26-48	2	3.5		Dartmouth		South Devon reef
The Crags	50 19:323 - 04 09:568	17 - 24	3	3		Devonport	Diveable at most states of tide	Plymouth outside of Sound near Poulmic. A Reef.
The Gulleys	50 17.531 - 04 03.656	15-25						South Devon reef
The Ridge		7-10				Torbay	Diveable at any state of the tide	South Devon reef
Three Pinnacles	50 13.955 - 03 53.968	17 - 30	3	3		Salcombe	Mild drift ideal for this site	South Devon reef
Tinker Shoal		10-22				Devonport	Diveable at any state of tide on neaps. Best viz at HW flood	South Devon reef
Tinsey Head		18	2.5	0.5	15 - 30	Dartmouth	Southward drift for much of the time.	South Devon reef
Totnes Castle	50 15.375 - 03 58.841	45		2.5	45 - 60	Challaboro'		South Devon wreck
Trawler	50 17.268 - 04 12.243	55						South Devon wreck
Trawler (Tasmania)	50 10.015 - 03 52.522	56						South Devon wreck
U 1063	50 08.940 - 03 53.471	60						South Devon wreck
Unicorn-Tile Wreck	50 16.937 - 04 15.529	53	3	3		Devonport		South Devon wreck
The Dartmouth Unidentified	50:18:00 - 03:30:60	46						Lyme Bay wreck
HMS Untiring	50 12.808 - 04 00.676	54	3			Devonport		South Devon wreck
Uskmoor	50 10:27 - 03 47:14	50						South Devon wreck
Volnay	50 04 152N - 05 04 031W	20						SW Cornish wreck
Wells Rock	50 17.486 - 03 56.291	15				Challaboro'		South Devon reef
West Rutts	50 13.695 - 04 05.312	25 - 40				Challaboro'		South Devon reef
Western Ebb Rock		8-16+				Devonport		South Devon reef
Wreathier	50 10.711 - 03 49.702	53				Salcombe		South Devon wreck

Site positions, depths and slack water times

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