Oceanic DataTrans Plus, Owner'S Manual

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14
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N o D e c o m pre ssio n D ive Tim e Re m a in in g
No Decom pr ession Dive Tim e Rem ain in g is t h e m axim u m am ou n t of t im e t h at
you can st ay at you r pr esen t dept h befor e en t er in g a decom pr ession sit u at ion .
It is calcu lat ed based on t h e am ou n t of n it r ogen absor bed by t welve h ypot h et i-
cal t issu e com par t m en t s. Th e r at es each of t h ese com par t m en t s absor b an d
r elease n it r ogen is m at h em at ically m odeled an d com par ed again st a m axim u m
allowable n it r ogen level. Wh ich ever on e of t h e t welve is closest t o t h is m axi-
m u m level is t h e con t r ollin g com par t m en t for t h at dept h . It s r esu lt in g valu e
will be displayed n u m er ically alon g wit h t h e No Decom pr ession Dive icon an d
gr aph ically as t h e Tissu e Loadin g Bar Gr aph (F ig. 14).
As you ascen d fr om dept h followin g a dive t h at h as appr oach ed t h e n o decom -
pr ession lim it , t h e Tissu e Loadin g Bar Gr aph will dim in ish as con t r ol sh ift s t o
slower com par t m en t s. Th is is a feat u r e of t h e decom pr ession m odel t h at is t h e
basis for m u lt ilevel divin g, on e of t h e m ost im por t an t advan t ages t h e
Dat aTr an s P lu s offer s. See t h e Refer en ce sect ion for m or e in for m at ion per -
t ain in g t o t issu e t r ackin g.
Th e n o decom pr ession algor it h m is based u pon H aldan e’s t h eor y u sin g m axi-
m u m allowable n it r ogen levels developed by Mer r ill Spen cer . Repet it ive divin g
con t r ol is based u pon exper im en t s design ed an d con du ct ed by Dr . Ray Roger s
an d Dr . Mich ael P owell in 1987. Divin g Scien ce an d Tech n ology
®
(DSAT), a
cor por at e affiliat e of P ADI ® , com m ission ed t h ese exper im en t s an d n ow u ses
F ig. 14 - No Decom pr ession
Dive Tim e Rem ain in g
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DECO
C.Z. C.Z.
PSI
FT
O2
NO DECO
0
5 10
20 30
40
50
60