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Using the Dive Stopwatch
TIP: You can add a simplified stopwatch screen to any of the gas dive modes (Customizing the Data Screens,
page 98).
1 Start a Gauge dive.
2 Scroll to the stopwatch screen.
3 Press START, and select Reset Avg. Depth to set the average depth to your current depth.
4 Press START, and select Start Stopwatch.
5 Select an option:
• To stop using the stopwatch, press START, and select Stop Stopwatch.
• To restart the stopwatch, press START, and select Reset Stopwatch.
Switching Gases During a Dive
1 Start a single-gas, multi-gas, or closed-circuit rebreather (CCR) dive.
2 Select an option:
• Press START, select Gas, and select a backup or decompression gas.
NOTE: If necessary, you can select Add New and enter a new gas.
• Dive until you reach the Deco PO2 threshold (Setting PO2 Thresholds, page 9).
The device prompts you to switch to the gas with the highest percentage of oxygen.
NOTE: The device does not switch gases for you automatically. You must select the gas.
Switching Between CC and OC Diving for a Bailout Procedure
During a closed-circuit rebreather (CCR) dive, you can switch between closed-circuit (CC) and open-circuit (OC)
diving while you perform a bailout procedure.
1 Start a CCR dive.
2 Press START.
3 Select Switch to OC.
The dividing lines on the data screens turn red, and the device switches the active breathing gas to your OC
decompression gas.
NOTE: If you have not set up an OC decompression gas, the device switches to your diluent gas.
4 If necessary, press START, and select Gas to manually switch to a backup gas.
5 Press START, and select Switch to CC to switch back to CC diving.
16 Diving
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