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5. Adjust the number of intervals with [UP] or [DOWN] and confirm
with [SELECT].
To use the apnea timer:
1. Press [SELECT] to start the first interval. The timer counts down
the ventilation time. The countdown continues up to -0:30
seconds beyond the defined ventilation time.
2. Press [SELECT] to start the apnea cycle. You can start this at any
time during the ventilation countdown.
The apnea time is not defined in the watch. It is as long or short
as you choose.
3. Press [SELECT] again to start the next ventilation cycle.
4. Repeat until the end of the defined number of intervals.
5. Press [MODE] to exit the apnea timer.
You can reset the apnea timer by keeping [SELECT] pressed.
The apnea timer supports up to 20 intervals, but this is dependent
on the ventilation and increment times. The last ventilation cycle
cannot be shorter than 0:05 seconds or longer than 20:00 minutes.
WARNING: Anyone who engages in any form of breath hold
diving is in danger of shallow-water blackout (SWB), the sudden
loss of consciousness caused by oxygen starvation.
3.4 Ascent rate
The ascent rate is displayed as a vertical bar along the right side of
the display.
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