Premature reserve on high altitude

[billvon 3,058]

>just a swipe through each riser.

That's one of those things that sounds a lot easier than it is.

[mjosparky 4]

Quote

Now guys jumping out at 30k are carrying a demand valve O2 supply, right? And they've been breathing it since before they left the plane?

You are right.

Jumps from 30,000 would entail breathing 100% O2 from below 10,000 until about 2 minutes before exit. At that time you would disconnect from the on-board O2 supply and start breathing from you bail out system. Most commonly used are twin 53's with a useful time of around 15/30 minutes. I have deployed as high as 28,000 and not had a problem with O2. Note, this was not with sports gear and a small, H/P main. Sports gear is not designed or tested to be used under these conditions.

Sparky

My idea of a fair fight is clubbing baby seals