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South Devon 2015

Thread Status: Hello , There was no answer in this thread for more than 90 days.
It can take a long time to get an up-to-date response or contact with relevant users.
Good to see old names on here. Nicks vids got me through many a bleak winter and now I also try to take them from behind.
cheers for update terry.
Was thinking about tonight but the weathers a bit iffy, web cams at hope shows it flat, blackpool sands a little choppy but the low tide is the question ?
 
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We dived last night opposite Plymouth. We had flat calm water, but the viz was quite silty, 1m at worst to 4m at best. We were in for 10:45 and out by 12:45 as there was nothing much to shoot. One of us got a 3lb bass and a couple of cuttlefish. There were many small red mullet about, and it was a search to find the big one (that I never found). Back out on Monday hopefully if the weather picks up.
 
I'm thinking of tonight. Blackpool sands is choppy so you'll need to head salcombe to challaborugh and beyond. Obviously on the other side of s hams sheltered from E/SE. PM me where your be so I dont turn up at your spot. Not sure yet if I'll go.
 
Was in at Salcombe today , pretty windy in the afternoon, chop kept swamping my snorkel , but vis is still pretty good 5+ metres I was in my kayak and covered quite a bit of coast exploring some new ground sadly it was pretty barren of fish though ... Terry
 
Finally went in for my first dive of the year earlier near salcombe, vis wasn't bad around 3-4 meters. Seemed like there was no fish around until a 4lb bass appeared towards the end and shall be on the dinner plate tomorrow. was rather pleased with myself as there are reasons which I shouldn't mention that kept me out of the water so a bass for the first dive is always welcome!
 
Went to Plymouth in the end and nothing seen. Vis was not great but a milky 2-3 meters, a bit more in some parts. Lots of string weed and other tall, looming weed but nothing showed itself. The spot I had wanted to explore was taken up with a jet skier which was a bit of a bummer. Would normally keep diving until sundown or until too cold but called it a day after just 45 mins. Still, nice to have been in.

Hope others have a better experience than me!!
 
Out of curiosity, have you guys ever noticed a correlation between atmospheric pressure and water visibility?

I was just looking at the weather this morning and began to wonder. A higher pressure should, in theory, help push sediment etc down therefore increase visibility.

I'm not sure if the pressure changes, say within a week, really make that much difference. I'd imagine swell and wind chop make the most difference. Just a thought...
 
I don't think it works quite like that,

Water pressure acts in all directions, so any increase in pressure at the 'top' of a particle of sediment would be exactly matched by the same pressure on the 'bottom' of the particle of sediment - leaving it in the same state as before.

Maybe if the sediment particles were compressible, the increase in pressure would increase their relative density making them sink more easily (just like you become neutrally and then negatively buoyant with increasing depth/pressure).

Other than that, I can't think of a mechanism that would directly relate atmospheric pressure and vis.
 
I guess the pressure change is minimal anyway. I was thinking of an old 'experiment' I once saw where you'd put match heads in a bottle of water. They float until you increase the pressure, by squeezing the bottle, making them sink.

I was musing this and wondering if air pressure would have this effect on the sea.

Thanks for the reply ;)
 
Yeah, that match head experiment is the same principal as you becoming negatively buoyant at depth due to pressure increase.

Going to go in later, but not sure what the best bet is viz wise, Pymouth (East of breakwater) or more towards the Kingsbridge area... Any thoughts?
 
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