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Hello

In different air diving tables decompression times differ quite
remarkably. For example a dive to 200' (60m) with 15 min bottom time
requires 19 minutes total decompression according to US Navy table
but 37 minutes according to DCIEM table and some other tables require
even more decompression time.

It is not very easy to compare diving tables because they use
different ascent or descent rates or decompression stop depths.
Comparing trimix tables might be even harder but still I'd like to
know how large the differences in decompression times are in
different trimix tables.

Unfortunately I don't have many trimix tables so could you send me 
the decompression profile (stop depths, times, gases and ascent speed
to first stop) from you tables or computer program for the following
dive: 
max depth 300 feet 
bottom mix 12% oxygen, 40% helium and balance nitrogen (poor persons
mix with 40% helium and balance air)
descent time 5 minutes 
time at bottom 10 minutes
decompression from 130 feet with Nitrox-32 or air
decompression from 20 feet with oxygen

If you table or program requires different gases or other parameters 
please tell also the differences.

I will post a summary when I get enough results.

-- 

Matti.Leinio@hu*.fi*

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