Variable Ascent Rate Indicator - Oceanic DATA PLUS Owner's Manual

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Segments = Speed (rate)
0 = 0 - 20 fpm (0 - 6 mpm)
1 = 21 - 30 fpm (6.5 - 9 mpm)
2 = 31 - 40 fpm (9.5 - 12 mpm)
3 = 41 - 50 fpm (12.5 - 15 mpm)
4 = 51 - 60 fpm (15.5 - 18 mpm)
5 = 61+ fpm (18.5+ mpm)
(when 5, all will flash)
Fig. 6 - Variable Ascent
Rate Indicator
6
gen loading decreases, the bar graph will begin to recede, indicating that addi-
tional exposure (accumulation) is allowed for that dive, and 24 hour period.
The O2 bar graph also assists you with managing high partial pressure of oxy-
gen (PO2) by flashing the large red Danger zone segment as a warning when
the level of PO2 exceeds the maximum allowed limit of 1.60 ATA.

Variable Ascent Rate Indicator

The Variable Ascent Rate Indicator™ (VARI), located along the top of the
screen (Fig. 6), is provided to help you to avoid excessive ascent rates by pro-
viding a visual representation of ascent speed, rather than just showing that
you are ascending too fast. The Variable Ascent Rate Indicator has been
granted U.S. Patent no. 5,156,055.
The 5 triangular segments of the bar graph, located beside green, yellow, and
red reference zones, appear beginning from the left and may be considered an
ascent rate speedometer. Green is a 'normal' rate, yellow is a 'caution' rate,
and red is 'Too Fast'.
In the event that your ascent rate exceeds the maximum recommended rate of
60 feet (18 meters) per minute, the bar graph segments will enter the red zone
and all 5 segments will flash once per second until your ascent speed is slowed.
If this occurs, you should immediately slow your ascent.
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