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Your central nervous system (CNS) oxygen toxicity level.
Green: 0 to 79% CNS oxygen toxicity.
Yellow: 80 to 99% CNS oxygen toxicity.
Red: 100% or greater CNS oxygen toxicity.
Your current oxygen toxicity units (OTU).
Green: 0 to 249 OTU.
Yellow: 250 to 299 OTU.
Red: 300 or greater OTU.
Gauge Data Screens
Dive stopwatch: Displays the bottom time stopwatch; current, maximum, and average depth; and rate of ascent
or decent (Using the Dive Stopwatch, page 16).
Dive compass: Allows you to view the compass and set a directional heading to aid with underwater navigation
(Navigating with the Dive Compass, page 15).
Customizable data screen: Displays additional dive data and physiological information, including the time of
day, battery level, and your heart rate. You can edit the gauges and the first five data fields (Customizing the
Data Screens, page 98).
Diving 13
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