Specifications

Oxygen Accumulation Bar Graph (O2BG)

The O2 Bar Graph (Fig. 2a) represents oxygen loading, your relative

oxygen tolerance dosage (OTU), showing the maximum of either per

dive accumulated oxygen, or 24 hour period accumulated oxygen.

As your accumulation increases during the dive, segments will add to

the Bar Graph, and as loading decreases, it will begin to recede, indi-

cating that additional exposure 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 (VARI)

The Variable Ascent Rate Indicator (Fig. 2b) provides a visual repre-

sentation of ascent speed (i.e., an ascent speedometer). Green is a

'normal' rate, yellow a 'caution' rate, and red is 'Too Fast'. The seg-

ments of the Variable Ascent Rate Indicator represent 2 sets of

speeds which change at a reference depth of 60 feet (18 meters). Re-

fer to the chart for segment values.

WARNING: At depths greater than 60 feet (18

meters), ascent rates should not exceed 60 feet per

minute (18 mpm). 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 21-30 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