Abalone opener dive and barbeque

Eric Sedletzky · Feb 6, 2007

I purposely didn't post this in the trips and marketplace page because nobody would see it,

but anyway,

The North Coast Divers are having an ab season opener dive and barbecue.

Sunday April 1st 2007
Fisk Mill Cove, Sonoma County, California.
8:00 AM
Activities: Ab diving, scuba diving ? Ling season opener also, Barbecued chicken, ribs, tri tips, beer, salads or pesto pasta or both?

$5 donation per person appreciated towards barbecue for those that want to get in on the food.

We will be cooking up abalone too, but that of course is free.

I believe Andy will hold a seminar on freediving that morning for those that have never freedove for abalone on the North Coast.

Don't forget to buy a fishing licence and punch card.

Camping is available near by at several local campgrounds.

This will be great fun and should not be missed under any circumstances!

For all the info and planning thread go to:
http://www.northcoastdivers.net

mweitz · Feb 6, 2007

Just beware that SCUBA and Freediving shouldn't be done on the same day.

Have fun,

Mark

Oh, don't forget your float tube, 7" fixed calipers and an ab iron.

ZKY:
I<SNIP>
Activities: Ab diving, scuba diving <SNIP>

Chuck Tribolet · Feb 7, 2007

mweitz:
Just beware that SCUBA and Freediving shouldn't be done on the same day.

Please explain.

mweitz · Feb 7, 2007

There is no way to calculate your nitrogen loading from freediving, so your dive computer won't be accurate if you SCUBA after freediving.

If you SCUBA first, when you freedive the bubbles in your system can become compressed and pass through your heart, simulating a PFO.

http://www.divetekadventures.com/Technical_bounceDive.htm

The "official" position on freediving and SCUBA on the same day by Kirk Krack / Performance Freediving (http://www.performancefreediving.com/team/kirk.html) is also not to do it.

Mark

Chuck Tribolet · Feb 7, 2007

Your first cite is talking about freediving after deco diving.

Now, should you do a recreational SCUBA dive to the limits of your computer, and
immediately start freediving? No. But a recreational SCUBA dive first thing in the
morning, and grabbing some abs midafternoon?

Eric Sedletzky · Feb 7, 2007

mweitz:
There is no way to calculate your nitrogen loading from freediving, so your dive computer won't be accurate if you SCUBA after freediving.

If you SCUBA first, when you freedive the bubbles in your system can become compressed and pass through your heart, simulating a PFO.

http://www.divetekadventures.com/Technical_bounceDive.htm

The "official" position on freediving and SCUBA on the same day by Kirk Krack / Performance Freediving (http://www.performancefreediving.com/team/kirk.html) is also not to do it.

Mark

I would say that could be true if we were doing very deep freedives beyond even one atmosphere, but for ab diving all we do is dive 10 to 20 feet typically.

I use a mixture of 36 % in my tank usually so this is even better.

Then also, I always freedive before I scuba dive and where we (or I) will be scuba diving at Fisk mill the max depth is probably no more than 60 feet max with an average of 45 feet. I also wait an hour or so before I throw the tank on.

As far as I'm concerned this is a non issue.

mweitz · Feb 7, 2007

Maybe and probably. I posed the exact same question to Kirk in the Performance Freediving Class. Remember, he is not only a freediver trainer, he is a RB trainer, and a technical SCUBA trainer. His answer was "No" and I believe that is the official stance of the CAFA.

Mark

Chuck Tribolet:
Your first cite is talking about freediving after deco diving.

Now, should you do a recreational SCUBA dive to the limits of your computer, and
immediately start freediving? No. But a recreational SCUBA dive first thing in the
morning, and grabbing some abs midafternoon?

renpirate · Feb 7, 2007

I read the article and he is talking about bounce diving, not free diving. The major difference is in bounce diving on scuba you are absorbing more nitrogen due to breathing compressed gas at depth. In free diving, you are breathing the same volume of air at depth as at the surface.

I have heard this arguement before. We discussed it in my instructor class and our course director mentioned it, but said there was nothing conclusive only speculation at this point based upon theory. The discussion also revolved more around deep freediving.

The nitrogen loading at 15' for 1 minute would be very negligable. Therefore, I think it is worth noting, but as ZKY mentioned based upon the diving we are doing it shouldn't be a problem. However, based upon the various arguements, the safest way would be to free dive first and scuba later. All the arguements point to problems arising by free diving after scuba.

So Mark, will you be joining us for the ab opener?

mweitz · Feb 7, 2007

There is a similiar article GI wrote with his support divers getting DCS freediving for O2 bottles at 20' after the dives.

Do you understand why a PFO can be so dangerous on SCUBA?

Mark

renpirate · Feb 7, 2007

Oh, I most definitely understand the dangers. You do know that a PFO(Patent Foramen Ovale) is an existing heart problem. BTW, I did some more research and edited my post above.

Abalone opener dive and barbeque

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