Quote:
Originally posted by Sdiver
Here's what you have to work with.....
1st Dive is at 80 feet
2nd dive is at 70 feet
***Remember, your 2nd dive is the deeper one.***
Both dives are for 30 minutes.
You have a 1 hour and 30 minute (1:30) serface interval.
You are diving on AIR only. No NITROX or mixed gases.
No computers can be used.
No protable chambers.
You must SHOW YOUR WORK !!!! I want to see dive profiles.
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It's been a while, but I'll try.
I assume you mean that the 1st dive is at 70 and the second is at 80; otherwise the second would not be deeper!
Pressure interval after first dive (70 feet, 30 minutes) is O.
1:30 surface interval takes you down to pressure group C.
Residual nitrogen time after surface interval at 80 feet is 10 minutes, and total permitted time for next dive is 20 minutes. So, we're proposing to dive for 20 minutes longer than we should (i.e. 30 Dive 2 + 10 RNT).
I take it that we can't increase the surface interval, right?
I don't recall how to address this problem. Decompression stops? Seems to me this is not a recreational dive!
I am the acorn that becomes the oak. Teach me, oh divemaster.