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GALILEO 2 TEK (G2TEK) USER MANUAL
3 .4 .4
Diving with Sidemount mode
Prior to diving with Sidemount mode,
you have to make sure that the features
“Sidemount” and “PMG” in the G2TEK’s
8.7 Feature upgrade
menu are enabled.
Afterwards the Sidemount mode has to
be activated, as described in chapter
Activating Sidemount
. Activating the
Sidemount mode will automatically activate
the PMG mode as well. Pair two sidemount
tanks with equal oxygen mixture to your
G2TEK and you are ready to go.
F
NOTE: For technical diving you can
pair 6 additional tanks and the G2TEK
will guide you through your dive.
The G2TEK starts the sidemount dive
with tank T1. The RBT value is shown
considering you are using both tanks.
When the preset threshold step is reached,
the G2TEK will suggest that you perform
the switch to the other tank. An audible
sequence is played and the message
SWITCH TO GAS T2 appears on the
display. You have 30 seconds to respond
to this message.
If you for any reason do not switch to the
requested tank, the G2TEK will mark the
currently used tank with an underlying red
triangle. The triangle points to the other
tank. This indicates you should switch to
that tank, because the threshold step is
reached.
Delayed gas switch
: You can catch up
on a recommended tank switch at any time
by selecting the tank manually. Press-and-
hold the BOOK button to start the tank
switch procedure. The G2TEK will show
the message SWITCH TO GAS T2 on the
display. This helps you verify that you are
performing a switch to the recommended
tank. At this point you would press the
SAVE button to confirm the switch. The
G2TEK will display the message SWITCH
TO GAS T2 SUCCESSFUL.
3 .4 .5
Diving with CCR mode
The CCR (Closed Circuit Rebreather) system
is probably older than the Open Circuit
Scuba system because the basic operating
principle with manual control didn’t require a
highly reliable regulator system.
The CCR system also uses the gas more
efficiently than an open loop system, because
the oxygen is added to the breathing loop
only as needed. Respectively, the carbon
dioxide generated by the body is bound to
calc at the scrubber. As a side effect the CCR
system is nearly bubble-free, which can be
beneficial when engaged in photography or
observing fish under water.
In the CCR system the breathing gas ppO
2
(partial pressure of the oxygen) is kept
constant. The CCR system itself takes care
of this. Compared to an open loop system
the constant ppO
2
converts to a variable
nitrox mix at different depths.
For example, a ppO
2
setting of 1.0bar is
comparable to an open loop 50% nitrox
mix at a depth of 10m/33ft in salt water.
