SUUNTO Zoop - Manual (Page 35)

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decompression time decreases below 200 minutes, the first (lowest) bar graph seg-
ment appears. As your body absorbs more nitrogen, more segments start to appear.
White Zone - As a safety precaution Suunto recommends you should maintain the
no-decompression bar graph within the green zone. Segments start to appear when
the available no-decompression time decreases below 100, 80, 60, 50, 40, 30 and
20 minutes.
Yellow Zone - As the bars reach the yellow zone, your no-decompression stop time is
less than 10 or 5 minutes and you are getting very close to no-decompression limits.
At this point, you should start your ascent towards the surface.
Red Zone - As all of the bars appear (red zone), your no-decompression stop time
has become zero and your dive has become a decompression stop dive (for more
information see section 3.3.5. “Decompression dives”).
3.3.4. Ascent Rate Indicator
The ascent rate is shown graphically along the right side of the display as follows: