Starting a dive

1. Press the Up button on the watch to open the app list, and go to Workout > Diving.
2. Choose your target diving mode, touch on the right to access the settings screen, complete the settings to better suit your needs, and touch OK.
3. Press the Down button or touch the start icon to begin your dive. While diving, you can:
   • Press the Down button or rotate the crown to scroll on the data screen.

     Data details screen:

     

     

     

     

     

     

     Additional data for technical dives:

     

     

     • Stopwatch: When you reach the stopwatch screen, you can press the Up button to start/pause/resume timing, or press and hold the Up button to reset the stopwatch.

       

     • Compass: When you scroll to the compass screen, you can press the Up button to lock/unlock navigation directions.

       

   • During technical dives, you can press the Assist button on the upper left side of the watch to view the advanced settings.
     • Switch gas: Press the Up button to select Switch gas, and press the Down button to open the gas list. After selecting a gas, press the Down button to confirm the switch.

       

     • Edit gas: Press the Up button to select Edit gas, and press the Down button to open the gas list. After selecting a gas, edit Oxygen concentration and Helium concentration, and press the Down button to confirm the edit. The watch will automatically switch to the selected gas.
   • Free diving hover time in Freedive

     Freedivers make use of a rope to dive to a particular depth and stay there for some time to let their lungs adapt to underwater pressure. Hover time reminders let freedivers know when the hover time is over.

4. After you return to the surface after a dive, press and hold the Up button to end the diving session.
5. After the dive, gently rinse the watch with fresh water or soak it in clean water for more than 15 minutes, to clean off any sea salt, silt, or other substances. Swipe down on the watch face screen to enter the shortcut menu and touch Drain. Then, wait for the watch to dry.
   

   The watch will show a no-fly time after each dive, during which you are advised not to travel by plane.

Button functions during dives

Diving examples

Recreational dives

1. Preparation screen

   You can set the water type, and view the current diving mode by its icon, altitude, and surface time.

2. Descent time

   During your descent, you can view real-time diving data like the diving mode, descent rate, depth, temperature, gas, and dive time. You can also use buttons to scroll on the screen to view more diving data, and key data like depth, no-decompression limit (NDL), and dive time will be displayed on all screens.

   

3. Bottom stay

   The initial NDL is 99 minutes, but this value decreases as the depth and time increase. Further, the PO2 increases with the depth, and the CNS rises gradually.

   

4. Low NDL

   When the NDL is less than 5 minutes, the NDL will turn yellow. To avoid decompression, you need to ascend to the surface.

   

5. Ascent

   The NDL will gradually increase as you ascend. Pay attention to your ascent rate. When the ascent rate is greater than 9 m/min for a certain period of time, the watch will give a reminder. When the ascent rate is greater than 12 m/min for a certain period of time, the watch will give an alert. When receiving a reminder or alert, you are strongly recommended to reduce your ascent rate, to reduce the risk of decompression sickness.

   

6. Safety stop

   When you ascend to a depth of 6 meters, the watch will pop up "Start safety stop", after which a safety stop countdown will begin. (When you've descent to a depth beyond 30 meters or the NDL is less than 5 minutes, the safety stop duration will be adjusted to 5 minutes.) After the safety stop duration ends, the watch will pop up "Safety stop complete", and start timing.

   

Technical dives

1. Gas list

   Check the gas list before each dive. The gas settings in decompression calculation also apply to technical diving. Make sure that you have properly set each type of gas that you carry in the gas list, and don't enable any gas that you don't have.

2. Calculate decompression

   You can use the Calculate decompression tool to make a decompression plan, and estimate your total dive time, decompression plan, gas switching time, and gas consumption based on the maximum depth and bottom stay time.

   All decompression calculation results are estimates and for reference only. Do not take them as the only basis for your decisions. In complex diving activities, you are advised to use multiple devices for comprehensive calculation and evaluation.

   

3. Preparation screen

   You can set the water type, and view the current diving mode by its icon, altitude, and surface time. Make sure your watch has sufficient power.

   

4. Descent screen

   During the descent, you can view real-time data such as depth, dive time, PO2, and CNS. The screen will also show the gradual decrease of NDL.

   

5. Bottom stay

   When the NDL drops to 0, the NDL information switches to the first decompression stop (including the depth and the decompression duration), and the TTS gradually increases.

   

6. Gas switch

   During a dive, the watch will prompt you to switch the gas when another gas is more suitable for the current stage. If the switch is not made in time, the watch many give a reminder or alert, and the accuracy of decompression information cannot be ensured.

   

7. Ascent to decompression stop

   During your ascent, the watch will give a decompression stop reminder when you reach your first decompression stop. After completing the decompression, you can continue to ascend until the next decompression stop.

   

8. Decompression end

   After completing all decompression stops, the watch will give a "Decompression stop complete" reminder, and start timing.

   

Reminders/Alerts