18
The VT3 will store oxygen accumulation calculations for up to 10
dives conducted during a 24 hour period. If the maximum limit
for NORM dive oxygen loading has been exceeded for that day
(24 hour period), all of the segments of the O2BG will be
displayed flashing.
Depth/Time values will not appear in Plan Mode until the O2BG
recedes into the normal zone (lower 4 segments) indicating that
your daily oxygen dosage has decreased an amount equivalent
to the amount accumulated during the latest dive completed.
The VT3 also features a 5 segment NORM/GAUG Mode
Variable Ascent Rate Indicator (VARI) (Fig. 8a) that provides a
visual representation of ascent speed (i.e., an ascent speedom-
eter). The segments of the VARI represent two sets of speeds
which change at a reference depth of 60 feet (18 meters). Refer
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 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. 8 - VARI
a
VARI
Deeper than 60 FT (18 M)
Segments
Ascent Rate =
Displayed
FPM
MPM
0
0-20
0-6
1
21-30 6.1-9
2
31-40 9.1-12
3
41-50
12.1-15
4
51-60
15.1-18
5
60 +
18 +
60 FT (18 M) & Shallower
Segments
Ascent Rate =
Displayed
FPM
MPM
0
0-10
0-3
1
11-15 3.1-4.5
2
16-20 4.6-6
3
21-25
6.1-7.5
4
26-30
7.6-9
5
30 +
9 +
