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GALILEO 2 TEK (G2TEK) USER MANUAL
WARNING
• When in Gauge mode, all warnings and all
alarms are OFF except for the low battery,
tank reserve, half tank, max depth, max dive
time and pressure signal alarm
• When the G2TEK is set to SOUND OFF mode,
all audible alarms and warnings are switched
off.
3 .6 .1
Ascent rate
As you ascend during a dive, the pressure
surrounding you decreases. If you ascend
too quickly, the ensuing pressure reduction
could lead to microbubble formation. If you
ascend too slowly, the continued exposure
to high ambient pressure means that you
will continue loading some or all of your
tissues with nitrogen. Consequently, there
is an ideal ascent rate that is slow enough
to minimize microbubble formation yet fast
enough to minimize the effect of continued
loading on your tissues.
The pressure reduction that the body can
tolerate without significant microbubble
formation is higher at depth than it is in
the shallows: The key factor is not the
pressure drop by itself, but rather the ratio
of the pressure drop relative to the ambient
pressure. This means that the ideal ascent
rate at depth is higher than it is in the
shallows.
Along these lines, the G2TEK employs a
variable ideal ascent rate. Its value ranges
from 3 to 10m/min (10 to 33ft/min) and the
actual breakdown by depth range is listed
in the table below.
DEPTH
ASC SPEED
m
ft
m/min
ft/min
0
0
3
10
2.5
8
5.5
18
6
20
7
23
12
40
7.7
25
18
60
8.2
27
23
75
8.6
28
31
101
8.9
29
35
115
9.1
30
39
128
9.4
31
44
144
9.6
32
50
164
9.8
32
120
394
10
33
If the ascent rate is greater than 110% of
the ideal value, the speed window turns
yellow.
For ascent rates higher than 140%, the
ASCENT TOO FAST
warning is displayed
and the ascent window changes to red.
