Viewing the Surface Interval App
The surface interval app shows your nitrogen (N2) and helium (He) tissue load level, current oxygen toxicity units (OTU), and central nervous system (CNS) percentage.
NOTE:
The OTU accumulated during a dive expire after 24 hours. For more information
about the National Oceanic and Atmospheric Administration (NOAA®) OTU guidelines and calculations, see garmin.com/dive/cns-otu.
-
Select
SI.
Green: 0 to 79% tissue load.
Yellow: 80 to 99% tissue load.
Red: 100% or greater tissue load.
Green: Under the NOAA recreational
limit. Yellow: NOAA
recreational limit. Red: NOAA
military limit. Green: 0 to 79% CNS oxygen toxicity.
Yellow: 80 to 99% CNS oxygen toxicity.
Red: 100% or greater CNS oxygen toxicity.