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3.23 Rebreather diving
By default Suunto EON Steel has one mode dedicated to rebreather
diving, CCR mode. This mode uses fixed high/low setpoint values
which you can modify in the dive computer or through DM5.
Fixed setpoint calculation enables Suunto EON Steel to be used as a
backup dive computer on rebreather dives. It does not control or
monitor the rebreather unit in any way.
When you select CCR mode (see
3.13 Dive modes
), the gases menu is
split into two: CC gases (closed-circuit gases) and OC gases (open-
circuit gases).
NOTE: For rebreather dives, Suunto EON Steel should be used as
a backup device only. The primary control and monitoring of your
gases should be done through the rebreather itself.
3.23.1 Closed-circuit gases
On a rebreather dive, you need at minimum two closed-circuit
gases: one is your pure oxygen tank, and the other is a diluent. You
can define additional diluents as needed.
The correct oxygen and helium percentages of the diluent gas(es) in
your diluent cylinder(s) must always be entered into the dive
computer (or through DM5) to ensure correct tissue and oxygen
calculation. Diluent gas(es) used on a rebreather dive are found
under CC gases in the main menu.
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