| I remember whilst diving stoney last year i got quite narked and which led to what i think was a CO2 hit. We were happily floating down the slope towards the 30m mark, eventually reaching 35m. I had my large 3 chip video housing with me, and was trying to video my buddy. The task loading combined with swimming and physically lugging the housing around got to me. It started with a buzzy feeling, followed by an impending sense of dread that literally made me weak at the knees! I kid not!
I felt like i needed some sort of visual reference of the cliff face or something to settle my fears, but we ended up swimming across barren silt for sometime. Once at the cliff edge and we scended up to say 26m it went and I was fine.
I recently passed my advanced nitrox deco procs and trimix certs, and whilst diving to approx 45m on air i felt 'ok', but my response times were noted by my instructor as being slower. I managed to do the drills ok, sending up lift bags etc...
When diving the same dives, and slightly deeper to 50m on trimix, my response times were notably quicker (i was breathing 21/34).
Light levels were nearly non existant passed 30m, pitch black at 40m +, which i thought would knacker me totally, but was ok, especially so on mix.
So.... Do a trimix course for 40m or deeper dives is my advice. |