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
It is possible to manually select a gas while
diving which may have unsuitable high or
low oxygen content or narcotic effect for
that depth. The gas selection is not limited
by the computer due to possible emergency
situations that may arise. Selecting the
improper gas may result in serious injury or
death.
1.4 Minimum and Maximum
Operating Depth
Absolute Minimum Depth (AMD) and
Maximum Operating Depth (MOD) are
calculated from the oxygen content in the
mix. The ppO2 that is given by the user is
divided by the oxygen fraction. The result
will be pressure, which is converted to
depth. The maximum MOD is valid for all
gases, while the minimum AMD is only
applicable to a gas mix where the oxygen
fraction is less than air.
F
Note:
Air(21/0)givesdifferentMODthanfor
example Trimix 21/10. The reason is
Galileousesamoreprecisevaluefor
theoxygenintheair,whichis20.7%.
1.5 PDIS for both N2 and He
Prole Dependent Intermediate Stop (PDIS),
as described in the main manual, has been
extended to both Nitrogen and Helium
gases. The optimal off gassing depth will be
indicated when PDIS is enabled. PDI stops
are not obligatory, but will potentially assist
in reducing possible bubble formation.
1.6 Oxygen Toxicity Units (OTUs)
During long decompression dives, the
diver’s body will be loaded with high
oxygen concentrations for a longer period
of time. There are two limits that need to
be monitored; the Central Nervous System
(CNS) clock (described in main manual)
and the Oxygen Toxicity Units OTUs.
For OTU credits and limits the NOAA values
are used.
1.7 Ascent speed
The optimal ascent rate is fast enough to
prevent further compartment saturation, but
slow enough to prevent bubble formation
in tissues. When making decompression
dives with mixed gases this becomes
an important factor. Galileo allows faster
ascent at greater depths and slower ascent
at shallower depth (see Ascent Speed
Alarm Limits). Be aware that the alarm limit
only indicates ascents which are too fast
and not optimal.
Maximum allowed ascent speed has been
reduced compared to the standard Galileo
SW. Standard SW ascent speed is used
when Trimix is disabled. When TMx setting
is enabled the slower ascent speeds are
taken in use.
F
Note:
ReducedAscentspeedincreasesthe
TotalAscentTime(TAT)thatisshown
duringdiving.
2. Diving with the Galileo
Tec SW
Warning: Before performing Trimix dives
with the Galileo you should practice no-stop
recreational diving to become accustomed
to the interface and functions of the diving
computer.
Galileo Tec SW has some screen differences
on the diving displays when compared to
the standard Galileo software.
English
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