Garmin Descent Mk2s Quick Start Manual page 11

Multi-Gas: This mode allows
you to configure multiple
gas blends and switch
gases during your dive.
You can set the oxygen
content from 5–100%. This
mode supports one bottom
gas, and up to 11
additional gases as
decompression or backup
gases.
NOTE: Backup gases are
not used in no-
decompression limit (NDL)
and time to surface (TTS)
decompression
calculations until you
activate them during a
dive.
Quick Start Manual
CCR: This mode for closed-
circuit rebreather (CCR)
diving allows you to
configure two partial
pressure of oxygen (PO2)
setpoints, closed-circuit
(CC) diluent gases, and
open-circuit (OC)
decompression and
backup gases.
Gauge: This mode allows you
to dive with basic bottom
timer features.
NOTE: After diving in
gauge mode, the device
can only be used in gauge
or apnea mode for 24
hours.
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