8
WELCOME TO AERIS !
AND
THANK YOU FOR CHOOSING THE ATMOS 2 !
Your ATMOS 2 presents the information that you need before, during, and after your air (or
nitrox) dives using a combination of easy to read displays and identification icons. It can also be
set to operate simply as a digital depth gauge/timer. This instructional guide is intended to help
you become familiar with the functions and features available and show you examples of displays
that you could expect to see in the various operational modes. Relax and read through the com-
plete operating manual.
Remember that the rules you learned in your basic scuba certification course(s) still apply to the
diving you will do while using a dive computer - some will become even more important. Tech-
nology is no substitute for common sense, and a dive computer only provides the person using it
with data, not the knowledge to use it.
Since the ATMOS 2 can be used when diving with either Air or Nitrox, the term Breathing Gas is
used in this manual.
Breathing Gas is the gaseous mixture breathed during a dive.
Air is a breathing gas that contains approximately 21% oxygen and 79% nitrogen (nature's
common nitrogen-oxygen mixture).
Nitrox is a nitrogen-oxygen breathing gas that contains a higher fraction of oxygen (22 to 50%)
than air.
