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10
WARNING: At depths greater than 60 FT (18 M),
ascent rates should not exceed 60 fpm (18 mpm). At
depths of 60 FT (18 M) and shallower, ascent rates
should not exceed 30 fpm (9 mpm).
10 20 30 40 50 6005
TOO
FAST
O
2
DECO
ATR
O
2
N
2
Oxygen Accumulation Bar Graph (O2BG)
Variable Ascent Rate Indicator (VARI)
Fig. 3 - O2BG and VARI
a
b
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
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
Fig. 4 - VARI Values