Operation Manual

Oxygen Accumulation Bar Graph (O2BG)

Variable Ascent Rate Indicator (VARI)

WARNING: At depths greater than 60 feet (18

meters), ascent rates should not exceed 60 feet per

minute (18 meters per minute). At depths of 60 feet

(18 meters) and shallower, ascent rates should not

exceed 30 feet per minute (9 meters per minute).

Fig. 2 - O2BG and VARI

Variable Ascent Rate Indicator

Deeper than 60 feet (18 m)

Segments Ascent Rate =

Displayed FPM MPM

0 0-20 0 - 6

1 21-50 6.5-15

2 51-60 15.5-18

3 >60 >18

60 feet (18 m) & Shallower

Segments Ascent Rate =

Displayed FPM MPM

0 0-10 0 - 3

1 11-25 3.5-7.5

2 26-30 8-9

3>30>9