Quote:
| Originally Posted by Mark Chase Exactly
Running a DOTB(oat) profile id be very concerned about the effort involved in getting back on the boat and on to the bench.
One thing a CCR can show you is when you have finished off gassing. Jack up the PP02 to 1.6 at 6m and your on pure 02. You can see just how quickly it drops off. On the profile i posted you can see from min 87 to min 100 there is a gradual decay in the PP02. Then i did another 02 flush and after that it stays constant at 1.6. So basicly i stoped off gassing significant Helium and Nitrogen at apx Min 100 into this dive.
Thgis is significent when you review the Vplanner profile which ends deco at min 105.
ATB
Mark Chase |
Yes, my other complaint about poor deco is the time spent at the surface before getting on the boat. I like to have a full 5 mins before getting on the boat, and in France, was able to get out of the water fully dekitted, reducing physical effort as much as possible whilst that 'bubble rush' is going on.
As for the CCR thing, I am no expert, but just because the po2 stays at 1.5 (not 1.6, if you look at your chart) then does that not just mean that the o2 being metabolised is the same volume as that being injected into the loop? I am unsure what signicance it has in terms of inerts. It could I guess tell you that your blood has been saturated with o2 at a pressure of 1.5 and you could then say that the 'o2 window' is at its optimum, because at the beginning of the stop it will take a few minutes for the inspired po2 to match the rest of your bloodstream (in this case 5 mins perhaps?), but it isn't really an indication of what the state of play is with the inerts is it?
This is the type of question where we need the likes of Rich Walker, as it is too scientific for the likes of me.
Andy