On 2019/08/09 23:23, Robert Helling wrote:
Willem,
could you please have a look at the final computation in
staticdoublecalculate_cns_dive(conststructdive*dive)
in divelist.c
It seems to me that the first minus in
cns+=(double)t/((double)cns_table[j][SINGLE_EXP]-((double)po2i-(double)cns_table[j][PO2VAL])*(double)cns_table[j][SINGLE_SLOPE]/10.0)*100;
should be plus (at least according to the formula in the comment above. At
least, with this minus, you get negative CNS values for a planned air dive to
80m of depth.
Best
Robert
The reason for the negative value is because the dive plan involves pO2
values above 1.6bar (EAN38 at 35m=pO2 of 1.7bar). The NOAA tables do not
provide values above pO2 = 1.6.
I am working on a sensible solution because we need a sensible approach
for this use case.
Kind regards,
willem
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