glbirch
Contributor
padiscubapro:
100 metres? 330 ft? Have to say that claim gets a raised eyebrow.
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- Thread starter gehadoski
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100 metres? 330 ft? Have to say that claim gets a raised eyebrow.
CA Diver
Contributor
Blue Hole, Guam. 43m (130 fsw) Nitrogen Narcosis definitely an issue. I became very focused on my computer and ascending slowly to avoid having my computer go into deco requirements.
These days, that claim should raise more than an eyebrow. In his defense, back in the bad old days 300 feet on air wasn't at all unheard of, even if crazy. Hopefully, new divers that hear these warrior tales of old will take the message to heart: some things that used to be okay no longer are. A lot of lessons were learned the very hard way and if folks will let the old farts share those lessons, scuba can be a safer sport than it has ever been.glbirch:
glbirch
Contributor
reefraff:
Don't have to say that twice. My instructor was old school Navy, and he had the odd story to tell.
Just for the heck of it, I ran a 100 metre dive on my dive computer in simulation mode. Flashing lights and warning beeps all over the place, PPO2 up around 2.3, I think if it could have it would have popped a tiny lift bag and headed for the surface without me...
It's been said already but some of the older thoughts that were normal then are totally nuts by todays standards.
In the 60's it wasn't unusual at all for 300' on air but you had better be in good shape. That was in the days before McDonalds and the burger butts. People were leaner and worked harder. Not as much behind the desk stuff.
I've been to 300 and change a lot but I won't be back. Age and the burger butt have taken it toll and it would most likely kill me now. When I was doing that stuff I was in the best shape of my life.
I have a good friend that I dive with quite a bit that did 483'. I'm still chipping on him for it and I will untill we are both plant food. Flippin idiot.
Everyone's system is different. Some can handle extreams with ease while others have problems well within the normal limits. What it boils down to is stay with what modern science has proven works to keep you safe and don't get stupid.
Records don't belong in diving and it shouldn't be turned into a competition sport.
Gary D.
In the 60's it wasn't unusual at all for 300' on air but you had better be in good shape. That was in the days before McDonalds and the burger butts. People were leaner and worked harder. Not as much behind the desk stuff.
I've been to 300 and change a lot but I won't be back. Age and the burger butt have taken it toll and it would most likely kill me now. When I was doing that stuff I was in the best shape of my life.
I have a good friend that I dive with quite a bit that did 483'. I'm still chipping on him for it and I will untill we are both plant food. Flippin idiot.
Everyone's system is different. Some can handle extreams with ease while others have problems well within the normal limits. What it boils down to is stay with what modern science has proven works to keep you safe and don't get stupid.
Records don't belong in diving and it shouldn't be turned into a competition sport.
Gary D.
CA Diver:
whooooa, and thats somewhere with really good viz you need too watch it in limited viz. I Maxed out at 47M on air (chasing a shark with my video doh). was on compuiter and had 2 min s of no deco left so climbed back up slowly folliwng the two min NDL till i got to 30m then it all opened up. But must admit i have never felt any sign of narcosis, maybe i need to go deeper (only joking)
reefraff:
back then the dive was just a higher level of concern, today I think.. What the F*** was I doing...
That dive was at the end of a week of deep diving.. the high nitrogen exposure (acts as a depressent on the nervous system) and repetive nature of high oxygen exposures is probably what kept CNS issues at bay.. (thats not to say I didn't have any CNS symptoms, I had to swim a bit harder than I planned and my ears started ringing.. thankfully it was at the end of the planned dive and I never did that again...It sunsided around 50m)
glbirch
Contributor
gehadoski:
Central Nervous System. High PPO2 can cause severe, potentially fatal problems, referred to as HPNS (High Pressure Nervous Syndrome).
actually HPNS is usually seen with high helium mixtures thats why real deep stuff they add a bit of nitrogen to depress the central nervous system...glbirch:
HPNS symptoms (most commonly slow tremors as seen in the abyss) are usually seen at depths approaching 600 fsw (180m) with no nitrogen in the mix..
CNS systems brough on my oxygen are different.. involuntary spasms of the face (twitching), ear ringing, convulsions ect..
