Descent Mk1 - Dive Data Screens

During a single-gas or multi-gas dive, you can view the current dive conditions, the dive compass, and physiological data (Viewing the Primary Gas Dive Data Screen,  Navigating with the Dive Compass ,  Viewing Additional Gas Dive Data ).

During a gauge dive, you can view the current dive conditions, the dive stopwatch, the dive compass, and heart rate data ( Using the Dive Stopwatch ,  Navigating with the Dive Compass ,  Viewing Additional Gas Dive Data ).

During an apnea or apnea hunt dive, you can view the current dive conditions, your surface time, details about your last dive, heart rate data, and the map ( Diving with the Map ).

Viewing the Primary Gas Dive Data Screen

1. During a single-gas or multi-gas dive, scroll to the first data screen. 
   
   

   	Your nitrogen (N2) tissue load level.  Green: 0 to 79% tissue load.  Yellow: 80 to 99% tissue load.  Red: 100% or greater tissue load.
   	Your rate of descent or ascent.  Green: Good. Ascent is less than 7.9 m (26 ft.) per min.  Yellow: Moderately high. Ascent is between 7.9 and 10.1 m (26 and 33 ft.) per min.  Red: Too high. Ascent is greater than 10.1 m (33 ft.) per min.
   	Your partial pressure of oxygen (PO2) level.

   
   

2. When you pass the no-decompression limit (NDL) time or perform a safety stop, the data screen shows ascent information. 
   
   

   	The safety or decompression stop ceiling depth.
   	The safety or decompression stop time remaining.

Navigating with the Dive Compass

1. During a single-gas, multi-gas, or gauge dive, scroll to the dive compass. 
   
   

   The compass indicates your directional heading .

2. Select  to set the heading.

   The compass indicates deviations  from the set heading .

3. Select , and select an option:

   • To reset the heading, select Reset Heading.

   • To change the heading by 180 degrees, select Set to Recip..

     NOTE: The compass indicates the reciprocal heading with a red mark.

   • To set to a 90-degree heading left or right, select Set to 90L or Set to 90R.

   • To clear the heading, select Clear Heading.

Viewing Additional Gas Dive Data

During a single-gas, multi-gas, or gauge dive, scroll to the third data screen. 

Using the Dive Stopwatch

1. Start a Gauge dive.
2. Scroll to the stopwatch screen. 
   
   
3. Select > Reset Avg. Depth to set the average depth to your current depth.
4. Select > Start Stopwatch.
5. Select an option:

   • To stop using the stopwatch, select> Stop Stopwatch.

   • To restart the stopwatch, select> Reset Stopwatch.

Diving with the Map

1. During an apnea dive activity, scroll to the map.
2. Select , and select an option:

   • To pan or zoom the map, select Pan/Zoom.

     TIP: You can select  to toggle between panning up and down, panning left and right, or zooming. You can hold  to select the point indicated by the crosshairs.

   • To mark your location, select Save Location.

     TIP: You can select DOWN to change the icon.