20
Breathing Gas Consumption and Depth are continuously monitored and Air Time Remaining re-
flects any change in circumstances. For example, when a buddy starts breathing from your octo-
pus or you suddenly find yourself swimming against a strong current and begin breathing more
rapidly, the
ATMOS ai
will recognize the change and adjust the Air Time Remaining accordingly.
Remember, the Air Time Remaining is the time you can remain at the present depth and still
safely surface with the tank pressure reserve that you selected during setup (End Pressure Alarm
Set Point).
When Air Time Remaining indicates zero (Fig. 12a), you should immediately initiate a controlled
ascent while monitoring your tank pressure. However, there is no reason to panic, the
ATMOS ai
has allowed for the breathing gas necessary for a safe ascent including any emergency decompres-
sion stops required.
Example:
You set the End Pressure Alarm for 300 PSI (20.5 BAR)
You are at a depth of 60 feet (20 meters)
Air Time Remaining decreases to 0:00
You ascend at a maximum rate of 30 fpm (10 mpm)
You surface with 300 PSI (20.5 BAR) pressure still in your tank
Fig. 12 -Air Time Remaining =
0:00
a
