CO2 on OC

[Garf]

i used to skip breathe, and use to experience vertigo on the bottom after a fast descent and absolutely blinding headaches when I surfaced. Frankly, they used to hurt so much I couldn't even think, so it prompted me to start asking questions. It didn't take lonng in the water with someone who knew what they were doing to notice the reason. Mr CO2 is not our friend.

[Finless]

Originally Posted by Scubee

That would be CO2. Shallow breathing, which is fast, doesn't get rid of the CO2 in the body. A way to deal with it is to breathe deeply and slowly in, then slowly out. the way I was shown was to count - in for 5, out for 7. The longer 'out' expels more of the CO2.

Somethign to do with using all your lungs, rather than just the top portion.

At least, that was the way it was explained to me.

I now have a vision of you with a rather impressive set of lungs which you use to their fullest potential.

[Scubee]

Originally Posted by Finless

I now have a vision of you with a rather impressive set of lungs which you use to their fullest potential.

Finless!!

[Finless]

Originally Posted by Scubee

Finless!!

Tsk tsk young lady. I refer, of course, to your fictitious 'lungs' that all have seen .......... not that your real ones aren't lovely because .............. I'm just digging myself in deeper, aren't I?

I certainly wouldn't take liberties with your real parts ............ why, I'm blushing at the very thought.

[Scubee]

Originally Posted by Finless

Tsk tsk young lady. I refer, of course, to your fictitious 'lungs' that all have seen .......... not that your real ones aren't lovely because .............. I'm just digging myself in deeper, aren't I?

I certainly wouldn't take liberties with your real parts ............ why, I'm blushing at the very thought.

A present for you, finless... although you don't seem to need it

[Finless]

Originally Posted by Scubee

A present for you, finless... although you don't seem to need it

No. Indeed. It's not snowing?

Erm, I'll shut up now.

[Dave Abraham]

Exellent thread and I have a lot of respect for all who have replied as well

Back to the OP yes I have been there done that and I'm not going back ever.

70m on air in Dotty in December, cold as the tax man's heart. Did a steady decent watching the depth on my computer all the way from 60 down. I didn't have any breathing issues and no headaches but I knew my problem solving capacity was seriously compromised. This was the first and only time I have felt the heebie jeebies on a dive and was very happy to start the ascent. Back on the surface my buddie had gone through exactly the same feelings and said and I quote

"We were on God's list that time luckily we were not at the top of it"

IMHO there are three thing that you are up against
Narcosis
CO2
and an O2 partial pressure of 170% or a 1.7 setpoint if you prefer

Then add the cold and the dark and you are looking at a seriously challenging dive.

The only way I would ever do it again would be if someones life depended on me doing it i.e. to rescue a sinking buddy, other than that count me out.

I am not an easy person to impress and you have all impressed me by posting here so have a green each