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CCR Data Screens

The primary data screen for the CCR dive mode displays the main dive data, including your breathing gas and rate of ascent or descent. You can press DOWN to scroll through additional data, including your central nervous system (CNS) oxygen toxicity level and your current oxygen toxicity units (OTU) (Viewing the Surface Interval Glance), and view the dive compass (Navigating with the Dive Compass).


CCR dive data screen with callouts

Callout number 1

Indicates whether closed-circuit (CC) or open-circuit (OC) diving is active.

Callout number 2

Your partial pressure of oxygen (PO2) level.

Callout number 3

Your nitrogen (N2) and helium (He) tissue load level.

Green Green: 0 to 79% tissue load.

Yellow Yellow: 80 to 99% tissue load.

Red Red: 100% or greater tissue load.

Callout number 4

Your rate of descent or ascent.

Green Green: Good. Ascent is less than 7.9 m (26 ft.) per minute.

Yellow Yellow: Moderately high. Ascent is between 7.9 and 10.1 m (26 and 33 ft.) per minute.

Red Red: Too high. Ascent is greater than 10.1 m (33 ft.) per minute.

GUID-9183E86B-2399-4CFC-AB50-EAFC6D6ED326 v4
March 2025
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