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15
WISDOM
C
NS
CNS
O2
O2
D
E
C
O
DECO
N2
N2
ALARM LED
The Nitrogen Bar Graph monitors 12 different nitrogen compartments simultaneously and displays
the one that is in control of your dive. It is divided into a green No Decompression (normal) zone, a
yellow Caution zone (also No Decompression), and a red Decompression (danger) zone.
While you cannot provide a guarantee against the occurrence of decompression sickness, you may
choose your own personal zone of caution based upon age, physique, excessive weight, etc., to reduce
the statistical risk.
Oxygen Accumulation Bar Graph (O2BG)
The O2 Bar Graph (Fig. 4a) represents oxygen loading, your relative oxygen tolerance dosage (OTU),
showing the maximum of either per dive accumulated oxygen, or 24 hour period accumulated oxy-
gen. As your accumulation (% saturation) increases during a dive or 24 hour period, segments will
add to the Bar Graph, and as loading decreases, it will begin to recede, indicating that additional ex-
posure is allowed.
NOTE: Displays associated with oxygen and the O2 Bar Graph will only
appear if FO2 has been set at a value other than 'Air' (e.g., a numerical value).
Variable Ascent Rate Indicator (ARI)
The Variable Ascent Rate Indicator (Fig. 4b) provides a visual representation of Ascent speed (i.e., an
ascent speedometer). Green is a 'normal' rate, yellow a 'cautionary' rate, and red is 'Too Fast'. The
segments of the Variable Ascent Rate Indicator represent 2 sets of speeds which change at a refer-
ence depth of 60 feet (18 meters). Refer to the chart at the right for segment values.
Fig. 4 - O2BG & ARI
a
b
Variable Ascent Rate Indicator
Deeper than 60 feet (18 m)
Segments Ascent Rate =
Displayed FPM MPM
0 0-20 0 - 6
1 21-30 6.5-9
2 31-40 9.5-12
3 41-50 12.5-15
4 51-60 15.5-18
5 >60 >18
60 feet (18 m) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0-10 0 - 3
1 11-15 3.5-4.5
2 16-20 5-6
3 21-25 6.5-7.5
4 26-30 8-9
5 >30 >9
N
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  • How do you turn the safety stop on? I dove and the safety stop timer did not pop up? Submitted on 22-11-2022 at 16:52

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