The starting pressure is set as 1 ata.

### VPM Constants

The constants ** *** r*_{o, }* gamma, *and *lambda*
are set in SUB diveData.

As ** *** r*_{o} increases, **psMin** and **criticalGradient**
get smaller, leading to longer
decompression times. Substitution of the range of values 0.8 __ <__ ** r**_{o }__<__
1.2 into the code is physically reasonable.

As ** gamma** (= g in Refs. 1 and 2 )
decreases,
**psMin **and **criticalGradient** get smaller, leading to longer decompression times. Substitution of the
range 16 __ <__ ** gamma** __ <__ 20 into the code is physically reasonable.

__My Programs' Constants__

The default half-times are Buhlmann's ZHL-16 set: 4.,8.,12.5,18.5,27.,38.3,64.3,77.,109.,146.,187.,239.,305.,390.,498.,635.
(min)

The VPM constants are the same as Yount and Hoffman's.

** *** r*_{o} = 1 (micron)

* gamma* = 17.9 (dyne/cm)

**lambda** = 7180 (fsw min)

__Yount and Hoffman's Constants__

The eight fastest half-times in ref 1 are: 2,5,10,20,40,80,120,160 (min).

Lambda: l = 7500 (ffw min)

** *** r*_{o} = 1 (micron)

__
__

Wienke's Constants

Half-times in ref 2 are: 1,2,5,10,20,40,80,120,180,240,360,480,720 (min).

Delta =
d --same
as Yount's lambda: l--
7180 (fsw min) = 7502 (feet of freshwater x minutes)

** *** r*_{o} = 0.8 (micron)