Uwatec Galileo 2 User manual

®
Galileo 2
(G2)
User Manual

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GALILEO 2 (G2) USER MANUAL

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English
GALILEO 2 (G2) USER MANUAL
GALILEO 2 (G2) USER MANUAL
The G2 Diving Computer – Designed for all kinds of diving.
Welcome to SCUBAPRO dive computers and thank you for purchasing the G2. You are now
the owner of an extraordinary partner for your dives. This manual provides you easy access
to SCUBAPRO state-of-the-art technology and the G2’s key features and functions. Should
you wish to know more about SCUBAPRO diving equipment, please visit our website
www.scubapro.com
IMPORTANT
Before using your SCUBAPRO G2, please carefully read and understand the Read First booklet that
is included in the package.
WARNING
• The G2 has a depth rating of 120m/394ft.
• At depths between 115m/377ft and 120m/394ft in dive computer mode the message SWITCHING
TO GAUGE appears on the display, and at depths over 120m/394ft the G2 automatically switches to
Gauge mode and cannot be used as a decompression computer for the remaining time of the dive.
• Diving at oxygen partial pressures higher than 1.6bar (corresponding to a depth of 67m/220ft when
breathing compressed air) is extremely dangerous and could lead to serious injury or death.
The G2 dive instrument is a personal protective equipment in compliance with the essential safety requirements of the
European Union directive 89/686/EEC. RINA SpA,Via Corsica 12, I-16128 Genoa, notified body no. 0474, have certified
its conformity with the European Standard EN 250: 2014 (EN 250: 2014 : Respiratory equipment – Open circuit self-
contained compressed air diving apparatus – requirements, testing and marking);
The G2 dive instrument is also compliant with the European Union directive 2014/30/EU.
Standard EN 13319: 2000
The G2 dive instrument is compliant with the European standard EN 13319: 2000 (EN 13319: 2000 – Depth gauges and
combined depth and time measuring devices – Functional and safety requirements, tests methods).

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GALILEO 2 (G2) USER MANUAL
TABLE OF CONTENTS
1. Introduction to the G2 .......................................................................................... 8
1.1 Power concept and charging .................................................................. 8
1.2 Operating modes .................................................................................. 10
1.3 Switching on the G2 .............................................................................. 10
1.4 No-Dive warning .................................................................................... 12
1.5 No-Fly time ............................................................................................ 12
1.6 SOS ...................................................................................................... 12
1.6.1 Emergency information .......................................................... 13
1.7 Owner information ................................................................................. 13
1.8 Mounting and pairing the high pressure transmitter ............................... 13
1.9 SCUBAPRO Human Factor DivingTM ...................................................... 16
1.10 Turning off the G2 .................................................................................. 16
2. G2 settings and menus ...................................................................................... 17
2.1 O2settings ............................................................................................ 19
2.1.1 Recreational (factory setting) .................................................. 19
2.1.2 Multigas (PMG) ...................................................................... 19
2.1.3 Trimix ..................................................................................... 20
2.1.4 CCR ....................................................................................... 20
2.1.5 MOD setting ........................................................................... 21
2.2 Dive settings .......................................................................................... 21
2.2.1 MB level ................................................................................. 21
2.2.2 Dive mode (Algorithm selection) ............................................. 22
2.2.3 Safety stop timer .................................................................... 22
2.2.4 ppO2max .............................................................................. 22
2.2.5 Water type ............................................................................. 22
2.2.6 Nitrox reset time ..................................................................... 23
2.2.7 Max surface time .................................................................... 23
2.2.8 OTU settings .......................................................................... 23
2.2.9 All-silent mode ....................................................................... 25
2.2.10 Sidemount ............................................................................. 26
2.2.11 CCR ....................................................................................... 26
2.2.12 Trimix ..................................................................................... 27
2.2.13 PDIS ...................................................................................... 27
2.2.14 PMG ..................................................................................... 27
2.3 Apnea dive ............................................................................................ 27
2.3.1 Setting the maximum dual depth alarm .................................. 28
2.3.2 Setting the depth incremental warning ................................... 28
2.3.3 Setting the dive time interval warning ..................................... 29
2.3.4 Setting the surface interval warning ........................................ 29
2.3.5 Setting the ascent speed alarm .............................................. 29
2.3.6 Low HR alarm ........................................................................ 29
2.3.7 Water density ......................................................................... 30
2.4 Digital compass ..................................................................................... 30
2.4.1 Use compass ......................................................................... 31
2.4.2 Auto-off time .......................................................................... 31
2.4.3 Declination ............................................................................. 31

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2.5 Altimeter ................................................................................................ 32
2.6 Warning settings .................................................................................... 32
2.6.1 Maximum dive depth warning ............................................... 32
2.6.2 CNS O2=75% ......................................................................... 33
2.6.3 No stop time = 2 min ............................................................. 33
2.6.4 Entering deco ......................................................................... 33
2.6.5 Maximum dive time warning ................................................... 33
2.6.6 Tank pressure ......................................................................... 34
2.6.7 RBT = 3 min .......................................................................... 34
2.6.8 Pressure signal ....................................................................... 34
2.6.9 Entering level stops ................................................................ 35
2.6.10 MB stop ignored .................................................................... 35
2.6.11 MB level reduced ................................................................... 35
2.6.12 L0 no stop time = 2 min ......................................................... 35
2.6.13 Entering deco at L0 ................................................................ 36
2.7 Clock settings ....................................................................................... 36
2.7.1 Wake-up alarm ....................................................................... 36
2.7.2 Time ..................................................................................... 37
2.7.3 Time zone .............................................................................. 37
2.8 Other settings ........................................................................................ 37
2.8.1 Device information ................................................................. 37
2.8.2 Gas integration ....................................................................... 38
2.8.3 Tank reserve ........................................................................... 38
2.8.4 RBT warning or alarm ........................................................... 38
2.8.5 Breathing sensitivity ............................................................... 38
2.8.6 Bar graph .............................................................................. 39
2.8.7 Gas summary ....................................................................... 39
2.8.8 Pairing ................................................................................... 39
2.8.9 Backlight duration .................................................................. 39
2.8.10 Backlight intensity .................................................................. 40
2.8.11 Water contacts ....................................................................... 40
2.8.12 Factory settings ..................................................................... 40
2.8.13 Feature upgrade ..................................................................... 41
2.8.14 Software update .................................................................... 41
2.8.15 Format ash disk .................................................................... 41
2.9 Personalization ...................................................................................... 42
2.9.1 Screen conguration .............................................................. 42
2.9.2 Language ............................................................................... 42
2.9.3 Start-up picture ...................................................................... 42
2.9.4 Setting the user preferred units .............................................. 43
2.9.5 Workload ............................................................................... 43
2.9.6 Show owner info .................................................................... 44
2.9.7 Emergency info ...................................................................... 44
2.9.8 Display color .......................................................................... 44
2.10 Pictures ................................................................................................. 45
2.11 Dive planner .......................................................................................... 45
2.11.1 No-stop plan .......................................................................... 45
2.11.2 Decompression plan .............................................................. 46

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2.12 Help ...................................................................................................... 46
2.13 Bluetooth ............................................................................................. 46
2.14 Logbook ................................................................................................ 46
2.14.1 Apnea logs ............................................................................. 48
3. Diving with the G2 ............................................................................................... 49
3.1 Dive mode at surface ............................................................................ 49
3.1.1 Recreational (factory setting) .................................................. 49
3.1.2 PMG ...................................................................................... 49
3.1.3 Trimix ..................................................................................... 50
3.1.4 Sidemount ............................................................................. 50
3.1.5 CCR ....................................................................................... 50
3.1.6 Surface interval, no dive and CNS% counters ........................ 50
3.2 Button functions while diving ................................................................. 51
3.3 Altitude diving ........................................................................................ 53
3.3.1 Altitude classes and altitude warnings after a dive .................. 53
3.3.2 Altitude and the decompression algorithm .............................. 53
3.3.3 Prohibited altitude .................................................................. 54
3.3.4 Decompression dives in mountain lakes ................................. 55
3.4 Diving with nitrox .................................................................................. 55
3.4.1 Technical diving ...................................................................... 57
3.4.2 Diving with multiple gas mixtures ............................................ 57
3.4.3 Diving with Trimix mode .......................................................... 61
3.4.4 Diving with CCR mode .......................................................... 63
3.5 Warnings and alarms ............................................................................. 64
3.5.1 Warning settings .................................................................... 64
3.5.2 Maximum depth ..................................................................... 64
3.5.3 CNS O2= 75% ....................................................................... 64
3.5.4 No-Stop time = 2 min ............................................................ 65
3.5.5 Entering decompression ........................................................ 65
3.5.6 Dive time ................................................................................ 65
3.5.7 Tank pressure ......................................................................... 66
3.5.8 RBT = 3 min .......................................................................... 66
3.5.9 Pressure signal ....................................................................... 66
3.5.10 Entering level stops ................................................................ 67
3.5.11 MB stop ignored .................................................................... 67
3.5.12 MB level reduced ................................................................... 67
3.5.13 L0 no-stop = 2 min ................................................................ 67
3.5.14 Entering decompression at L0 ................................................ 68
3.6 Alarms ................................................................................................... 68
3.7 Ascent rate ........................................................................................... 68
3.7.1 MOD/ppO2............................................................................. 70
3.7.2 CNS O2= 100% ..................................................................... 70
3.7.3 Tank reserve pressure reached ............................................... 70
3.7.4 Missed decompression stop .................................................. 71
3.7.5 RBT = 0 min .......................................................................... 71
3.7.6 Low battery ............................................................................ 71

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3.8 Display information ................................................................................ 72
3.8.1 Display conguration during the dive ..................................... 72
3.8.2 Setting bookmarks ................................................................. 75
3.8.3 Stop watch timer .................................................................... 75
3.8.4 Safety stop timer .................................................................... 76
3.8.5 Backlight ................................................................................ 76
3.8.6 Compass ............................................................................... 76
3.9 Diving with MB levels ............................................................................. 77
3.9.1 Comparison of dives with MB level L0 and MB level L5 .......... 77
3.10 PDIS (Prole Dependent Intermediate Stop) ........................................... 77
3.10.1 Introduction to PDIS .............................................................. 77
3.10.2 How does PDIS work? ........................................................... 79
3.10.3 Special considerations when diving with
more than one gas mixture (G2) ............................................. 79
3.10.4 Diving with PDIS ..................................................................... 80
3.11 Gauge mode ......................................................................................... 81
3.12 Apnea mode ......................................................................................... 82
4. G2 accessories .................................................................................................... 83
4.1 Bungee arm strap ................................................................................. 83
4.2 Wireless high pressure transmitter ......................................................... 83
4.3 Skin temperature heart rate belt ............................................................ 83
4.4 Bluetooth USB stick .............................................................................. 84
5. Interfaces for the G2 and an introduction to LogTRAK .................................. 84
5.1 Charging and using the G2 with a USB interface ................................... 85
5.2 Bluetooth .............................................................................................. 86
5.2.1 Connecting the G2 with LogTRAK ......................................... 86
5.2.2 Download dive proles ........................................................... 87
5.2.3 Changing warnings/settings on the G2,
and reading computer info ..................................................... 87
5.2.4 USB ash disk operations ...................................................... 88
6. Taking care of your G2 ....................................................................................... 89
6.1 Format ash disk ................................................................................... 89
6.2 Technical information ............................................................................. 90
6.3 Maintenance ......................................................................................... 90
6.4 Replacing the battery in transmitter ....................................................... 91
7.1 Replacing the battery in Heart Rate Belt ................................................ 91
7.1 Warranty ................................................................................................ 91
8. Glossary ............................................................................................................... 93
9. Index ..................................................................................................................... 95

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GALILEO 2 (G2) USER MANUAL
The G2 is a technologically-advanced
instrument that can accompany you
during your underwater adventures while
providing you with accurate depth, time
and decompression information.
Your G2 User Manual is divided into 6 main
sections.
Introduction to the G2. This section
provides an overview of the G2 computer
and describes its operating modes and
main functions when on the surface.
G2 settings and menus. This section
goes through the settings of your G2.
Diving with the G2. This section takes you
underwater with the G2, showing you how
to use the G2 as a dive computer. It outlines
everything the G2 can—and will—do to
enhance your safety and fun underwater.
G2 accessories. This section briey
describes the G2’s extras that you can
purchase to get the most out of your dive
computer in all conditions.
Interfaces for the G2 and an
introduction to LogTRAK. This section is
all about personalization and customization.
It describes how to change settings, how
to download and how to manage your
logbook.
Taking care of your G2. This section
illustrates how to take care of your new dive
computer.
1. INTRODUCTION TO
THE G2
1.1 Power concept and
charging
The G2 is powered by a rechargeable Li-
Ion battery. SCUBAPRO recommends
fully charging the battery before using the
computer for the rst time.
To charge the battery, plug the power/USB
cable into your G2 as shown in the picture
below.
Then, connect the other end of the cable
to a USB charger, or a USB device capable
of providing power for charging. At this
point, the following battery charging status
symbols will appear on the display of the
G2.
FNOTE: If the G2’s battery is deeply
discharged, nothing will appear on
the display screen until the battery
has reached a safe charge level
for a startup. If this occurs, do not
disconnect the USB, and do not try to
activate the G2 by pressing a button.
Simply leave the G2 charging for at
least half an hour.

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Charging will continue, but the above
display will switch off after 3 minutes.
When the battery is completely charged,
the following display will appear.
The G2 will alert you when the battery is
approaching a critical discharge level by
displaying the following message.
In addition, the battery icon with current
charging status is shown above the main
time-of-day display.
WARNING
Starting the dive with a weak battery may lead
to a situation where the G2 shuts off during
the dive. In case of such an event you should
always carry a backup instrument that will
enable you to complete the dive safely. If the
G2 switches off during a dive it will remain
locked in Gauge mode for 48 hours. (For more
information on Gauge mode operation, see
chapter: Gauge mode.)
FNOTE: Storing the G2 with a low
battery may lead to a deep discharge
state, which shortens the life of the
battery.
WARNING
During the dive, when the battery charge level
indicator falls to only 1 segment, the display
will switch off automatically to save energy.
However, you can still check the display
manually by pressing the right button.
WARNING
The G2 will not start a dive when the battery
has reached the critical discharge level
indicated by the warning: “Charge battery!”
In this state you cannot use the G2 for diving.

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GALILEO 2 (G2) USER MANUAL
WARNING
When your G2’s battery reaches the end
of its lifetime, it can only be replaced by an
authorized SCUBAPRO service center. Do not
open your G2 or try to replace the battery
yourself!
1.2 Operating modes
The G2 has 4 operating modes:
• Charging and USB communication
mode. When connected to a USB
device the G2’s battery automatically
starts charging. At the same time, you
can access either the flash memory
or the logbook using the LogTRAK
program.
• Sleep mode. In this mode the display is
off, but the G2 still updates desaturation
and monitors ambient pressure for
altitude changes, etc. This mode is
activated automatically at the surface
after 3 minutes without operation.
• Surface mode. After a dive or when
manually activated, the display is on
and you can change settings or operate
the G2 with its buttons. The Bluetooth
interface can be activated in this mode.
• Dive mode. This mode is activated
when the computer reaches a depth
of 0.8m/3ft or more. In this mode the
G2 monitors depth, time, temperature
and wireless sensors. Decompression
calculations are performed in this mode.
1.3 Switching on the G2
To switch on the G2, press and hold the
right button.
F
NOTE: You cannot turn the G2 on
when it is connected to USB.
The initial activation of your G2 will require
some basic set up (selecting language,
setting the time, etc.). The G2 will guide
you through them. Simply follow the screen
prompts while using the buttons.
F
NOTE: The following basic setup will
also be required if you reset the G2
with the menu 8.7. Factory settings.
Press the right button.
Select your language with the left or middle
button. Then conrm your selection with a
press of the right button.

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GALILEO 2 (G2) USER MANUAL
Select each unit with the left or middle
button, and conrm it with the right button.
Set the time zone with the left or middle
button and conrm it with the right button.
After this initial setup, your G2 will boot to
a display that we call the main time-of-
day display. This is the display in which the
current time is shown in the main eld.
You G2’s button functions can be found
on-screen. To illustrate, the screen above
shows that pressing the left button will
take you to the main menu, pressing the
middle button will take you to the logbook
and pressing the right button will dim the
display light.
However, be aware that these function
labels may change depending on the
operational mode you’re currently in.
F
NOTE: There are two methods for
pressing the G2’s buttons:
1. “Short” press. This is the normal
method used in most cases with the
labelled functions.
2. “Press-and-hold.” This method is
used only in special cases. They are
described in this manual but are not
labelled on the screen.
Button functions at the surface are
summarized in the following table.
LEFT BUTTON MIDDLE BUTTON RIGHT BUTTON
Press Press and hold Press Press and
hold Press Press and hold
SCUBA, GAUGE
Main menu Oxygen setting Logbook Gas summary
table Backlight Compass
   Pictures  
APNEA
Main menu Manual start of
a dive Logbook Pictures Backlight Compass

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GALILEO 2 (G2) USER MANUAL
1.4 No-Dive warning
If the G2 detects a situation of increased risk
(due to potential microbubble accumulation
from previous dives or a CNS O2level above
40%), the NO DIVE symbol will appear to
advise you against performing another dive
right away. The suggested time interval
that you should wait prior to diving again is
shown on the dive mode display.
You should not undertake a dive as long
as the no-dive warning is displayed on
the computer screen. If the warning is
prompted by microbubble accumulation
(as opposed to CNS O2over 40%) and
you dive anyway, you will have shorter no-
stop times or longer decompression times.
Moreover, the duration of the microbubble
warning at the end of the dive can increase
considerably.
1.5 No-Fly time
The no-y time (NO FLY) is the time during
which an exposure to the reduced pressure
(equal to ascending at higher altitudes)
inside the cabin of an airplane could cause
decompression sickness, as calculated by
the decompression model in the computer.
The no-y text with countdown timer is
shown until the restriction is completed.
To learn more about altitude warnings
and altitude diving, see chapter: Altitude
diving.
WARNING
Flying while the G2 displays the NO FLY
symbol and countdown timer can result in
serious injury or death.
1.6 SOS
If you stay above a depth of 0.8m/3ft for
more than 3 minutes without observing a
prescribed decompression stop, the G2 will
switch into SOS mode. Once in SOS mode
the G2 will lock up and will be inoperable
as a decompression dive computer for
24 hours. If it is used for diving within the
24hours of an SOS lock, it will automatically
switch to Gauge mode and provide no
decompression information.
WARNING
• Violating a mandatory decompression
obligation may result in serious injury or
death.
• Serious injury or death may result if a diver
does not seek immediate treatment should
any signs or symptoms of decompression
sickness occur after a dive.
• Do not dive to treat symptoms of
decompression sickness.
• Do not dive when the computer is in SOS
mode.

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The display shows the same information
as when displaying desaturation but,
in addition, the SOS mode message is
displayed.
Instead of the no-y time, the 24-hour
countdown is shown. The middle button
description changes from LOG to SOS,
and by pressing it an emergency message
is displayed. The emergency information
for this display can be entered using
LogTRAK. Once the emergency message
is displayed, pressing the LOG button
shows the details of the last dive.
F
NOTE: If the battery becomes fully
discharged while at depth in spite
of using the power save mode, the
G2 will remain in SOS mode and
locked into Gauge mode for 48
hours, independent of the remaining
desaturation time.
1.6.1 Emergency information
To add your emergency information you will
need to use LogTRAK for Windows or Mac.
See section: Interfaces for the G2 and
an introduction to LogTRAK.
1.7 Owner information
To customize your time-of-day display
with your name or other text you need to
use LogTRAK for Windows or Mac. See
section: Interfaces for the G2 and an
introduction to LogTRAK.
F
NOTE: In the event you misplace your
G2, it is advisable to include some
contact information along with your
owner information.
1.8 Mounting and pairing the
high pressure transmitter
The G2 can receive tank pressure
information from multiple Smart series high
pressure transmitters. Each transmitter
needs to be mounted on a high pressure
port of a rst stage regulator.
To mount the transmitter, rst remove the
high pressure port plug from the rst stage
regulator, then screw the transmitter in
place.

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GALILEO 2 (G2) USER MANUAL
F
NOTE: Use an appropriate wrench to
tighten the transmitter. Take care to
not overtighten.
The Smart transmitter communicates via
radio frequency with the G2. For optimal
transmission performance, we recommend
positioning the transmitter as described in
the pictures below.
Transmitter position for the left hand.
Transmitter position for the right hand.
In order for the G2 to display the pressure
signal from a Smart transmitter, a coded,
interference-free line of communication
must rst be established. This step needs
to be performed only once for each
transmitter.
There are two methods for pairing the G2
to a transmitter.
1. For automatic pairing, proceed as
follows:
• Mount the first stage regulator with
the Smart transmitter on a full tank.
• Turn on the G2, ensure it is in the
time-of-day display, and place it near
(x) the transmitter as indicated in the
picture below.
• Open the tank valve.

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GALILEO 2 (G2) USER MANUAL
2. For manual pairing, proceed as follows:
• Mount the first stage regulator with
the Smart transmitter on a full tank.
• Turn on the G2, select menu 8.2.6.
Pair with transmitter.
• Open the tank valve.
Upon pressurization, the Smart transmitter
will send a pairing sequence to the G2.
When the G2 receives this information, the
display changes to show a listing of tank
designations. (T1,T2, etc.).
Tank T1 is always the main tank you start
your dive with. Other tanks are used when
diving with more than one gas mixture
(described in chapter: Diving with
multiple gas mixtures).
Use the ARROW buttons to select the tank
that you want to assign to the transmitter,
then press SAVE to lock in your selection.
The G2 will conrm the pairing with the
message PAIRING TO T1 SUCCESSFUL.
If you do not wish to complete the
operation, with a press-and-hold of the
right button the G2 will show the message
PAIRING CANCELLED. The pairing will
also be cancelled if you do not press SAVE
within 3 minutes of tank selection.
F
NOTE: The transmitter must have
been unpressurized for at least 40
seconds prior to performing the
pairing operation; otherwise it will not
transmit the pairing sequence.
Also, a transmitter can only be paired
to one tank designation. If you pair
the same transmitter to a second
tank designation, the rst one will be
erased. However, you can pair more
than one G2 to the same transmitter.
After a successful pairing of T1 to the G2,
the display will show the tank pressure in
either BAR or PSI. If tank T1 has not been
paired, the G2 will show NO P instead of a
pressure value.
If T1 has been paired but the G2 is not
receiving any signal, it will show - - - instead
of a pressure value.
On the surface, the status of tanks T2, T3,
etc. are shown in the gas summary table,
described in chapter: Gas summary.

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GALILEO 2 (G2) USER MANUAL
F
NOTES:
• The Smart transmitter has a range of
approximately 1.5m/5ft.
• To maximize the life of the battery,
the transmitter operates at a low
update rate when there is no pressure
change for more than 40 seconds.
The transmitter also turns itself off
when the pressure is 14bar/200psi
or less.
• If a transmitter battery is weak, the G2
will alert you with a screen message
displaying the tank assigned to that
transmitter as shown on the screen
below.
See chapter: Replacing the battery in
transmitter for information on how to
replace the transmitter battery.
1.9 SCUBAPRO Human
Factor DivingTM
The G2 has patented underwater Heart
Rate, Skin Temperature and Breathing
monitors. These features will customize
every dive based on your body reactions
and provide you more data that enhances
your diving experience and helps you to
become a more advanced diver.
To learn more about the physiology
of the SCUBAPRO Human Factor
DivingTM, see the booklet: “HEARTRATE
MEASUREMENT FOR BETTER
WORKLOAD ASSESSMENT,” Dr.
T. Dräger, Dr. U. Hoffmann, 2012,
www.scubapro.com.
1.10 Turning off the G2
The G2 turns off automatically after 3
minutes without active use, or without an
active Bluetooth link. When in the time-
of-day display, you can turn the G2 off
manually with a press-and-hold of both
right and left buttons simultaneously.

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2. G2 SETTINGS AND
MENUS
By pressing MENU from the time-of-day
display you will enter the Settings folder.
Note that when you rst reach a menu,
you are “outside” of it. Therefore, you must
press the ENTER button to get inside the
actual menu. Some menus have multiple
levels. You can return to previous levels with
a press-and-hold of the ENTER button.
Also, you can return to time-of-day display
by press-and-hold both right and left
buttons simultaneously.
Simply, by pressing ARROW buttons you
can surf the menu, and by pressing ENTER
you get into the menu selection. For menus
with multiple items there is an indicator bar
on the right side of the screen which shows
your current location.
Regardless of the language setting, all
menus are numbered for easy identication.
All of the sub menus function in a similar
way, meaning that if there is a value that
can be changed, the range will be shown
at the bottom of the screen (see screen
below). Sub menus are also numbered
using the decimal format x.y (x=main menu.
y=sub menu).
In this case, left and middle button functions
are labeled – and + (enabling you to edit the
current selection). The right ARROW button
moves your selection to the next eld and
SAVE stores the entered values. On the
right side of the screen a navigation bar
indicates the value as an analog meter.

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GALILEO 2 (G2) USER MANUAL
The Main menu offers the following settings:
Nr. Menu Nr. Menu
1 O2setting 6.10. MB stop ignored
2 Dive settings 6.11. MB level reduced
2.1. MB level 6.12. L0 no-stop = 2min
2.2. Dive mode 6.13. Entering deco at L0
2.3. Safety stop timer 7 Clock settings
2.4. ppO2max 7.1. Wake-up alarm
2.5. Water type 7.2. Time
2.6. Nitrox reset time 7.3. Time zone
2.7. Max surface time 8 Other settings
2.8. OTU settings 8.1. Device information
2.9. Desaturation reset 8.2. Gas integration
2.10. All-silent mode 8.2.1. Tank reserve
2.11. Sidemount 8.2.2. RBT = 0 min
2.12. CCR 8.2.3. Breathing sensitivity
2.13. Trimix 8.2.4. Bar graph
2.14. PDIS 8.2.5. Gas summary
2.15. PMG 8.2.6. Pairing
3 Apnea dive 8.3. Backlight duration
3.1. Maximum depth 8.4. Backlight intensity
3.2. Depth increment 8.5. Water contacts
3.3. Dive time interval 8.6. Factory settings
3.4. Surface interval 8.7. Feature upgrade
3.5. Low heart rate 8.8. Software update
3.6. Ascent speed 8.9. Format ash disk
3.7. Water density 9 Personalization
4 Digital compass 9.1. Screen conguration
4.1. Use compass 9.2. Language
4.2. Auto-off time 9.3. Start-up picture
4.3. Declination 9.4. Units
5 Altimeter 9.5. Workload
6 Warning settings 9.6. Show owner info
6.1. Maximum depth 9.7. Emergency info
6.2. CNSO2= 75% 9.8. Display color
6.3. No-stop = 2min 10 Pictures
6.4. Entering deco 11 Dive planner
6.5. Dive time 11.1. Plan a dive
6.6. Tank pressure 12 Help
6.7. RBT = 3min 13 Bluetooth
6.8. Pressure signal 13.1. Enable Bluetooth
6.9. Entering level stops 14 Logbook

19
English
GALILEO 2 (G2) USER MANUAL
By surng these menus you can quickly
become familiar with them. Following are
short descriptions for each selection.
F
NOTE: To make it easier to understand
the menu system in accordance
with your current level of diving, the
G2 has a feature upgrade function.
More advanced level functions and
selections do not appear in the menu
unless you want them to. (This is why
you might nd some menu numbers
missing from the MAIN menu screen.)
For example, if you are not diving with
rebreathers or using more than one gas,
it’s not necessary to enable the CCR or
PMG menu modes. This keeps the menu
system simple and streamlined to suit your
particular diving style.
2.1 O2settings
Here you can change the gas content of
the tanks that you are using as well as
the partial pressure limit of the gas. The
Maximum Operating Depth (MOD) limit
will be shown for the values that you have
selected. To learn more about diving with
Nitrox and MOD, see chapter: Diving with
nitrox.
2.1.1 Recreational (factory setting)
For normal one-tank diving you can select a
gas mix from 21% oxygen (Air) up to 100%
oxygen. The ppO2max value is required for
the MOD limit you intend to use for this gas.
The factory setting is 1.40bar.
WARNING
The MOD limit denes the warning depth
based on oxygen toxicity. However, depth
narcosis can affect a diver’s skills much
earlier, jeopardizing his or her ability to dive
safely at that depth.
2.1.2 Multigas (PMG)
If PMG is enabled, the O2setting will
appear as follows. See chapter: Diving
with multiple gas mixtures to learn more
about this feature.
T1 is always the default gas at the start of
the dive. Tank 2 through 8 values can be
adjusted the same way as Tank 1.

20
GALILEO 2 (G2) USER MANUAL
You can set a different ppO2setting for
decompression gases.
The maximum ppO2limit can be modied
at menu 2.4. ppO2max.
2.1.3 Trimix
If trimix is enabled the O2setting will appear
as follows. See chapter: Trimix to learn
how to enable this feature.
In trimix mode the oxygen fraction can be
selected from 8% to 100%.
F
NOTE: To ensure an adequate supply
of oxygen to the body, the gas used at
the beginning of the dive must contain
enough oxygen (you can use a travel
mix or one of the decompression
gases). Since the dive always starts
with tank T1, the minimum O2setting
for tank T1 is 18%.
WARNING
The Absolute Minimum Depth (AMD) depends
on ppO2min value. If the alarm depth is
shallower than 0.8m/3ft which is the dive start
depth for the G2, the alarm will not activate
before a 0.8m/3ft depth is reached! This
situation is dangerous and may lead to death
by drowning.
WARNING
Engaging in heavy work while at the surface or
at shallow depths while breathing less than a
21% oxygen (hypoxic mix) fraction may cause
a loss of consciousness and lead to drowning.
2.1.4 CCR
If the CCR mode is enabled the diluent tank
will appear as follows. Other tanks (T1 to
T8) can be congured as with PMG mode.
See chapter: CCR to learn how to enable
this feature.
Setpoint 1 can be selected from 0.2 to
0.95bar which denes the MOD.
Setpoint 2 can be selected from 1.0 to
1.6bar. Since higher values cannot be
reached at the surface, an AMD will be
calculated for the setting.