Specifications

8
®
As you ascend from depth following a dive that has approached the no decom-
pression limit, the Tissue Loading Bar Graph will recede as control shifts to
slower compartments. This is a feature of the decompression model that is the
basis for multilevel diving, one of the most important advantages the Data
Plus 2 offers.
The no decompression algorithm is based upon Haldane’s theory using maxi-
mum allowable nitrogen levels developed by Merrill Spencer. Repetitive diving
control is based upon experiments designed and conducted by Dr. Ray Rogers
and Dr. Michael Powell in 1987. Diving Science and Technology
®
(DSAT), a
corporate affiliate of PADI
®
, commissioned these experiments.
Oxygen Accumulation Time Remaining
Oxygen accumulation (exposure) during a dive, or 24 hour period, appears
graphically as the Oxygen Accumulation (O2) Bar Graph. As time remaining
before reaching the oxygen exposure limit decreases, segments are added to
the O2 bar graph. When the amount of time remaining before reaching the
oxygen limit becomes less than the No Decompression Dive Time Remaining,
calculations for the current depth will be controlled by oxygen. Oxygen Time
Remaining will then appear as the main numeric time display (Fig. 9a) as sig-
nified by the O
2
Time icon appearing to the right of the display. As oxygen ac-
cumulation continues to increase, the O2 bar graph will enter the yellow Cau-
tion Zone (described later).
Fig. 9 - O2 Time Remaining
O
2
FT
FT
N
O
D
E
C
O
C
.
Z
.
D
E
C
O
C
.
Z
.
O
2
MAX
a