CCR Data Screens

CCR dive data screen loop with callouts
Primary data screen

Displays the main dive data, including your breathing gas and rate of ascent or decent.

Callout number one

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

Callout number two

Your partial pressure of oxygen (PO2) level.

Callout number three

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 four

Your rate of descent or ascent.

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

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

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

Dive compass

Allows you to view the compass and set a directional heading to aid with underwater navigation (Navigating with the Dive Compass).

Customizable data screen

Displays additional dive data and physiological information, including the time of day and battery level. You can edit the gauges and the first five data fields (Customizing the Data Screens).

Callout number five

The time to surface (TTS) decompression calculation.

Callout number six

Your central nervous system (CNS) oxygen toxicity level.

Green Green: 0 to 79% CNS oxygen toxicity.

Yellow Yellow: 80 to 99% CNS oxygen toxicity.

Red Red: 100% or greater CNS oxygen toxicity.

Callout number seven

Your current oxygen toxicity units (OTU).

Green Green: 0 to 249 OTU.

Yellow Yellow: 250 to 299 OTU.

Red Red: 300 or greater OTU.

Transmitters data screen

Displays information about paired Descent™ T1 transmitters (Viewing the Transmitter Data Screens).

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