Quote: (Originally Posted by
PCDiver)
Never been in a wreck with a total silt out? The dust in some of the wrecks has a very fine structure. It is very easy to reduce vis to almost nothing with only couple of wrong fin kicks. Been there, done that.
No I have not been in a wreck silt out, but have been in cave (fine clay) siltouts where vis went to 'zero'.... I could still see the glow of my lights and gauges......but could not read them. That is what we are talking about here.
We are not talking about reading screens/gauges, but being able to see the HUD or at least the glow thereof to discern what it is telling you.
I do not believe that, short of physically blocking the HUD, one would not be able to see the glow and thus make out PO2 status in a zero vis situation.