I'd be interested to hear peoples thoughts on a hypothetical situation I was considering on the way to work this morning.
Imagine I'm cruising along at the end of my 130' dive on 32%. I'm within my NDL and dive plan as I reach the ascent line. Just then, Neptune appears, decides he hates me, and puts his trident through my back gas. Luckily, I have my handy 30 cu ft pony full of air, so I start my ascent using that.
The question is, what is my ascent schedule? I was planning on using nitrox to ascend, but now I'm on air at 130 ft.. My computer doesn't know what I'm breathing (nor even if I'm breathing). So I'm breathing more nitrogen and less oxygen than I had planned on as I ascend.
My instinct, based on no information or knowledge, would be something like this:
130 -> 70 @ 30 ft/min
70 - 1 min stop
70 -> 50 @ 30 ft / min
50 - 1 min stop
40 - 1 min stop
30 - 1 min stop
20 - 5 min stop or breathe it down to about 300 psi, whichever comes first.
Done diving for the day
So, do I have a lovely case of DCS, or shall I crack open a beer and have a cigar?
thanks,
dave.