Its also total boll##ks
At 51 I am the youngest diver in our teem. We have two divers over 65
To discribe any one in our group as fit would make me fall about laughing but they regularly do 180min ruun dives in water sometimes 100m+ and work hard down there as well. Youd laugh if you witnessed us straining like mad on a 7 ft crow bar in 70m of water trying to get some bit of tat to the surface
Whilst i have always maintained a conservitive aproach to deco I have had several ocasions where I needed to push it to the limits and beyound and a few deco incidents yet I a fat old unfit smoker have never been bent
Some of the people on the boat havent got the first clue about deco and just have their units on the factory settings they came with
So what does this prove?
Not a lot frankly
Some people get bent some dont or have a strong resistance to it
Then theres the whole PFO thing
We had a pair of divers in the group who had been deep air and deep trimix OC and CCR diving for 20+ years and suddenly one of them starts getting bent and hey presto its a PFO thats the cause?
And this is discoverd long after we start using boats with lifts and long after deep air profiles on BSAC & other laughable by modern standards tables.
PFO fixed and much more conservitive deco now folowed. So whats saved the day. The PFo Fix or the more conservitive deco?
Two things of note.
1: The bends started hapening after switching to CCR. Thats helium in the deco all the way out. WHich buggered me up dive one when I got a unit. I imediatly (after two or three dives feeling crap post dive) switched to 100% o2 for last 20mins of deco and never felt the same symptoms again.
2. They had some strange deco system I cant even remember the name of.
SHould we need to get checked for a PFO before Tec Diving?
IMHO no because if your realy that anal you should have built up gradualy to tec diving and any bend issues would have become aparent long before you put Helium in the tanks.
So IMHO its PFO check before you get your first twinset & deco computer, or don't bother
ATB
Mark
You call my post total boll##ks and then you write that your argument / story proves nothing? Ok.
Is a PFO check the holy grail? No, but we spend weeks for training and diving every year. We dont spend hundreds of USD we spend thousends every year. So 4 hours and maybe 500 USD every 5(?) years or at least once is nothing.
Why dont people check for it? Because of the money? No, because they may not like the result and the consequences.