The Galileo HUD Diving Computer – Designed for a revolution in diving.
Welcome to SCUBAPRO dive computers and thank you for purchasing the Galileo HUD.
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 HUD’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 HUD, please carefully read and understand the Read First booklet that
is included in the package.
WARNING
• The HUD has a depth rating of 120m/394ft.
• At depths between 115m/377ft and 120m/394ft in Dive mode the depth changes color and starts to
blink, and at depths over 120m/394ft the HUD 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.
• Never risk your life on only one source of information. Eventually, every computer has the potential
to fail, so do not depend exclusively upon it and always have a plan for how to handle failures. Use
a redundant dive computer, carry backup tables and depth/time instrumentation.
English
The HUD is delivered in deep sleep mode. Charge and press the push-wheel to activate your HUD
before the rst dive.
The HUD dive instrument is a personal protective equipment in compliance with the essential safety requirements of the
European Union Regulation 2016/425. 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 selfcontained compressed air diving apparatus – requirements, testing and marking);
The HUD dive instrument is also compliant with the European Union directive 2014/30/EU.
Standard EN 13319: 2000
The HUD 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).
GALILEO HUD USER MANUAL
WARNING
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TABLE OF CONTENTS
1. INTRODUCTION TO THE HUD ............................................................................. 6
2. HUD SETTINGS AND MENUS ............................................................................ 28
3. DIVING WITH THE HUD ...................................................................................... 50
1.1 Near Eye Technology ............................................................................... 6
1.2 Mounting the HUD on your mask ............................................................ 7
1.3 Mounting the holder to the mask ............................................................. 7
1.4 Mounting the HUD to the holder ............................................................ 11
1.5 Switching on the HUD ........................................................................... 14
1.6 The Surface screen ............................................................................... 14
1.7 Power concept and charging ................................................................ 15
8. INDEX ................................................................................................................... 86
English
GALILEO HUD USER MANUAL
5
The HUD is a technologically-advanced
heads up display dive computer designed
to provide you with accurate depth, time,
gas and decompression information.
Your HUD User Manual is divided into 6
main sections.
Introduction to the HUD. This section
provides an overview of the HUD computer
and describes how to mount the HUD to a
mask, as well as its operating modes and
main functions when on the surface.
HUD settings and menus. This section
goes through the settings of your HUD.
Diving with the HUD. This section takes
you underwater with the HUD, showing you
how to use the HUD as a dive computer
in both Open Circuit and Closed Circuit
Rebreather diving scenarios. It outlines
everything the HUD can—and will—do to
enhance your safety and fun underwater.
HUD accessories. This section briey
describes the HUD’s extras that you can
purchase to get the most out of your dive
computer in all conditions.
Interfaces for the HUD and an
introduction to LogTRAK. This section
describes how to download data, change
settings, and manage your logbook.
Taking care of your HUD. This section
illustrates how to take care of your new dive
computer.
1. INTRODUCTION TO
THE HUD
1.1 Near Eye Technology
The HUD is designed to be mounted on
a diving mask in very close proximity to
the human eye. A person with normal
vision is able to focus on objects starting
from a distance of approximately 20cm.
Since the micro OLED screen of the HUD
is positioned much closer than 20cm,
specially developed optics are required to
be able to read the screen clearly.
These multi-lens optics create an image of
the micro OLED screen at a virtual distance
of approximately 1m. This enables the diver
to read the dive data on the screen and
also maintain eye contact with his or her
surroundings without having to continually
adjust and readjust focus. (The size of this
image is about 30x20cm², enabling it to be
easily read by divers with normal vision.)
WARNING
• The HUD should never be used by divers who
are unable to achieve the proper alignment
of the HUD relative to their eye for optimal
readability (see following section), or who
in any way feel the positioning of the HUD
negatively impacts their comfort at depth.
• Always test for proper readability before
each dive, on the surface, and in a safe
environment.
• If you have issues with your vision or
experience optical problems of any kind,
consult with your doctor before diving with
the HUD. (Note: the HUD can be used with
contact lenses or optical lenses.)
• Always carry a second dive computer as a
backup.
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GALILEO HUD USER MANUAL
1.2 Mounting the HUD on
your mask
The HUD package includes a universal
mask holder which is designed to be
mounted on a dual-lens diving mask just
above the right eye. There are also options
available for mounting the holder to singlelens masks. These HUD holders attach to
the mask with two cable ties (included).
NOTE: There are also options available
F
that enables you to mount the HUD
directly to a SCUBAPRO mask.
You can nd a list of compatible masks
that a HUD can be mounted to with the
universal holder at www.Scubapro.com.
1.3 Mounting the holder to
the mask
The following parts are needed to mount
the HUD to your mask. They are all included
in your HUD package:
2
5
1. HUD
2. Cable ties
3. HUD holder
4. Ball
5. Protective foil
NOTE: We recommend that you don’t
F
remove the blue display screen’s
protective foil until the assembly
process is complete to avoid scratching
the glass.
3
4
1
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GALILEO HUD USER MANUAL
The following tools are needed to mount the
HUD to your mask. They are not included in
your HUD package:
3
1
2
1. SCUBAPRO mask
2. Side cutters
3. Small pair of pliers
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STEPS:
1. Place the HUD holder on your mask
frame to check the positioning of the
holder’s tiny legs (see arrow).
These legs stabilize the holder, preventing it
from shifting horizontally.
NOTE: The holder must be mounted
F
correctly on the mask to ensure that
the HUD is positioned correctly in your
line of sight.
2. Shorten the tiny legs as needed
with the side cutters. Guide lines are
provided on each leg edge to make
sure legs are shortened in equal
amounts.
3. Once the legs are trimmed, re-check
the tment.
Repeat this step until proper tment is
achieved.
4. Starting from above the mask, thread
the cable ties down between the hard
plastic of the mask frame and the
silicone, just above the nose pocket.
Direct one cable tie down the left side of the
nose, and one down the right side of the
nose. Once completed, double-check that
the cable ties are properly routed.
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GALILEO HUD USER MANUAL
NOTE: The correct positioning of the
F
heads of the cable ties -- knubbed
side facing the inside of the mask,
at side facing outside -- is very
important (refer to the top arrow in the
next magnied picture.) If reversed,
feeding the ends of the cable ties
becomes difcult, and the positioning
of the cable tie heads against the hard
plastic frame can affect the proper
tment of the mask.
5. While the next mounting step is not
necessary for most SCUBAPRO
masks, on a few mask models the
small ball, included in the HUD’s
mounting parts list, can be used to
even out the silicone in the area just
above the nose, eliminating a possible
pressure mark on your face. You can
nd out if your mask might benet
from the use of this ball by going to
www.scubapro.com.
If your mask doesn’t require the ball,
proceed to Step 6. If it does, at this time
insert the ball from the inside of the mask,
above the nose pocket at its highest point,
directly under the hard plastic frame. Press
it into the silicone behind the cable ties. The
cable ties should secure the ball and even
out any excess silicone.
6. Thread the cable ties through the
holder from back to front.
Hold the mask and holder in your hand
like in the picture below. This hand
position will also help you to hold the
ball in place if you’re using one.
English
The holder has 2 slots, one above the
other. The one you will use to thread your
cable ties depends on your mask.
If the bridge of the nose aligns with the
lower point, use the lower slot; if it is at a
higher position, use the upper slot. Go to
www.scubapro.com for more information
on which slot is the best for your
SCUBAPRO mask.
7. Thread the cable ties through the
slots (bending the ends a bit makes
it easier to thread). Take care that the
cable ties lie parallel to each other for
appearances sake.
GALILEO HUD USER MANUAL
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8. Place the heads of the cable ties close
to their nal resting position over the
hard plastic frame.
Thread the ends of the cable ties into
the heads and pull tight in a vertical
direction. If you’re using the ball, take
care that it stays in the correct position
while tightening.
Pull the cable ties individually,
alternating each equally. Take care that
the heads of the cable ties stay in their
nal resting positions over the hard
plastic frame while tightening. Both
cable ties should be properly aligned,
parallel to each other and as vertical as
possible.
10. Use the side cutter to shorten the
cable ties. Cut off as much excess
cable as possible, taking care the
remaining ends are smooth and
unable to penetrate the silicone.
NOTE: if you need to replace a cable
F
tie, use one with the dimensions of
.14x8in (3.5x200mm).
10
9. Use the pliers for the nal tightening.
Pull in a vertical direction to avoid
shifting the head of the cable tie. Check
to make sure the holder is strapped
tight and is stable and secure.
GALILEO HUD USER MANUAL
1.4 Mounting the HUD to the
holder
The mounting/adjustment assembly on the
HUD includes a hand wheel, a compression
spring, 4 standard spacers and 1 locking
spacer (with a at spot in its inner circle), all
arranged on the HUD’s stainless steel post.
STEPS:
1. For the initial mounting, unscrew the
hand wheel to the point where enough
of the stainless steel post (and spring)
is exposed between the spacers to
enable it to be inserted into the jaws of
the holder.
At this point the HUD’s mounting
adjustment assembly might look something
like this: closest to the HUD there would be
2 spacers, then an exposed length of
post with compression spring, then 3 more
spacers, and at the end, the hand wheel.
2. Insert the HUD into the holder and
tighten the hand wheel. As you tighten
the hand wheel the spacers will seat
themselves into the indents in the
holder’s jaws.
4. Put on the mask just like you were
preparing to go diving and check
the position of the HUD screen. You
want to be able to comfortably see
the complete screen. If it is out of
alignment with your line of sight, you’ll
need to make some adjustments.
The sample in the picture shows that the
HUD has to move to the right (purple arrow)
in order to align with the diver’s line of sight.
That means the distance between the HUD
and the holder needs to be reduced. This
can be easily accomplished by shifting the
position of the spacers.
(If the HUD has to be moved to the left –
orange arrow – the shifting of spacers
would be done in the opposite direction.)
5. Remove the HUD from the mask.
Unscrew the hand wheel again, but
this time remove it completely from the
HUD mounting/adjustment assembly.
English
3. Rotate the HUD screen to where it can
be viewed through the mask lens. Fix
its position by further tightening the
hand wheel.
GALILEO HUD USER MANUAL
6. Remove the locking spacer (the one
with the at space in its hole), the rst
group of standard spacers, then the
compression spring. This leaves the
spacers closest to the holder.
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To reduce the distance between the HUD
screen and the holder you would now
remove one of these spacers.
NOTES: If you’ll notice, the standard
F
spacers are recessed on one side. This
is so parts can be joined more efciently.
For example, the standard spacer
closest to the HUD should have its
recessed side facing the HUD. (Unless
you don’t need that spacer, in which
case it’s okay for the compression
spring to be placed directly against
the HUD.)
Also, when possible, the standard spacers
on either side of the compression spring
should have their recessed sides facing the
spring.
Finally, while it’s okay to shift the spacers
from one side to the other when making
adjustments, never remove them permanently
from the assembly. The HUD is designed to
be used with all spacers at all times.
7. Replace the compression spring, slide
on the standard spacers, then the
locking spacer, and nally the hand
wheel.
IMPORTANT
When replacing the hand wheel, make sure
to thread it onto the post at-side rst (see
#3 in next picture). This ensures that both
the assembly and the hand wheel itself is
secured with the hex nut located inside the
hand wheel.
1
3
8. Remount the HUD like before and
2
tighten down the hand wheel.
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GALILEO HUD USER MANUAL
Put on the mask again and see if the HUD
is now properly lined up. If not, repeat the
described steps until the HUD sits perfectly
in your line of sight.
The HUD can be tilted up and down for
vertical adjustment to ensure optimal
readability.
When not in use, the HUD can be
conveniently ipped up, out of your eld of
view.
NOTE: When diving in depths 3m/10ft
F
or shallower in locales where the sun is
extremely bright, screen visibility might
sometimes be reduced. Whether or
not this becomes an issue depends
on the positioning of the HUD screen
relative to the sun.
NOTE: For some divers using the
F
HUD for the rst time, having the HUD
positioned just above the right eye’s
line of sight takes some time getting
used to. However, it doesn’t take long
for the left eye to start compensating
for the small portion of the upper right
lens occupied by the HUD, while the
right eye is able to maintain close to
full visibility, with the added benet
of having all dive data available with
a simple upward glance. In no time
you’ll be diving without even noticing
the HUD is there—until it’s time to look
up and check your dive data.
English
NOTE: A foggy mask lens limits
F
visibility of the HUD display. Make sure
to keep your mask lenses fog-free for
maximum readability.
GALILEO HUD USER MANUAL
13
1.5 Switching on the HUD
Deep sleep mode
The HUD is delivered to you in a deep sleep
mode. This is done to preserve battery life
and ensure your HUD arrives with a fresh
battery.
In order to switch on the HUD for the rst
time a power connection is needed. After
this initial activation, the HUD will never
again return to deep sleep mode.
The HUD is powered by a rechargeable
Li-Ion battery. This battery must be fully
charged before using the computer for the
rst time.
To charge the battery, rst plug the power/
USB cable into your HUD as shown in the
picture below.
1.6 The Surface screen
The HUD’s Surface screen provides the
following information:
Left side of screen:
• Time
• Date
• Microbubble (MB) Level
• Gas
Right side of screen:
• Ambient pressure in mbar (accompanied
by the following symbols)
>970 mbar
970 to 870 mbar
<870 mbar
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Now connect the other end of the cable to
a USB charger, or a USB device capable
of providing enough power to complete the
charging process.
NOTE: If the HUD’s battery is deeply
F
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 HUD by pressing a button.
Simply leave the HUD charging for at
least half an hour.
NOTE: Please keep the HUD clean to
F
avoid scratches, dirty contacts or a
sticking plug.
To switch on the HUD, press-and-release
the push-wheel.
• Current altitude in meters/feet
• Number of gases set
• Battery level
Bottom of screen:
• Compass
• Transmitter Pairing Status (if active)
GALILEO HUD USER MANUAL
1.7 Power concept and
charging
When connected to power, the battery
symbol in the display appears in black/gray.
As the HUD becomes fully charged the
battery symbol switches from black/gray to
full gray.
English
WARNING
Starting the dive with a weak battery may
lead to a situation where the HUD switches 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 HUD switches off during a dive it will store
the dive information in the logbook but remain
switched off until you connect it to a USB
charging device.
After removing the power cable the battery
icon switches to green.
If left alone during the charging phase, the
HUD will switch to sleep mode. But it is still
charging.
The HUD will alert you when the battery
is approaching a critical discharge level
by displaying the following yellow battery
symbol.
GALILEO HUD USER MANUAL
NOTE: If your HUD shuts off during a
F
dive due to low battery power, when
you return to the surface and plug
in the charging cable to restart, your
HUD will be locked in Gauge mode
for 48 hours. Never start a dive during
this time because the decompression
information from the previous dive will
not be available.
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WARNING
During a dive, when the battery indicator
starts ashing red, the display will switch
off automatically to save energy. However,
you can still check the display manually by
pressing the push-wheel.
WARNING
The HUD will not start a dive if the battery has
reached the critical discharge level indicated
by the yellow battery symbol. In this state the
HUD cannot be used for diving.
WARNING
Dirt on any contact surfaces may increase the
electrical resistance and burn/harden the dirt
so that it is difcult to remove afterwards. To
enjoy trouble-free operation and a long service
life, clean the connection contacts on the HUD,
located on the underside of the casing just
above the screen, before charging.
WARNING
Rinse the HUD in fresh water after each dive
and dry it thoroughly before charging. Pay
particular attention to the area around the
charging contacts.
WARNING
When your HUD’s battery reaches the end
of its lifetime, it can only be replaced by an
authorized SCUBAPRO service center. Do not
open your HUD or try to replace the battery
yourself!
NOTE: Storing the HUD with a low
F
battery may lead to a deep discharge
state, which shortens the life of the
battery. Therefore, it is recommended
that you always charge the HUD
before storing. Also, make it a habit to
charge the battery every six months or
so, even if you’re not using the HUD.
This will help maintain the battery and
extend its useful life.
1.8 Operating modes
The HUD has 4 operating modes (in
addition to the deep sleep mode):
1. Charging and USB communication
mode. When connected to a USB
device the HUD’s battery automatically
starts charging. At the same time, you
can access either the ash memory
or the logbook using the LogTRAK
program.
2. Sleep mode. In this mode the display
is off, but the HUD still updates
desaturation and monitors ambient
pressure for altitude changes, etc.
This mode is activated automatically
at the surface after 5 minutes without
operation.
3. Surface mode. After a dive or when
manually activated, the display is
on and you can change settings or
operate the HUD with its push-wheel.
The Bluetooth interface can also be
activated in this mode.
4. Dive mode. This mode is activated
when the computer reaches a depth
of 0.8m/3ft or more. In this mode the
HUD monitors depth, time, temperature
and wireless sensors. Decompression
calculations are performed in this
mode.
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GALILEO HUD USER MANUAL
1.9 HUD push-wheel control
The HUD operates with an intuitive pushwheel that allows you to access and
control HUD functions with only one hand
and without having to look to see what that
hand is doing.
• To operate the wheel, simply rotate it
to toggle from the Surface screen to
the GPS screen, to navigate up and
down within a menu, or to increase or
decrease a user setting.
• To enter or exit a menu or to set user
parameters you would press the end of
the push-wheel.
• There are 2 methods for pushing the
HUD push-wheel control: a press-andrelease, and a press-and-hold.
• A press-and-release turns on the HUD,
takes you to the main menu, lets you
enter the various sub-menus and lets
you select functions and save settings.
• A press-and-hold allows you to return
to the previous menu or screen, edit
settings, and from the Surface screen
turn the HUD off.
• Press-and-release and press-and-hold
functions can change based on what
menu or operational mode you’re
currently in. To avoid confusion, at
the bottom of each screen you’ll see
reminders of what each push function
does on that particular screen. (The
“short” arrow indicates the press-andrelease function for that screen, while
the “long” arrow indicates the pressand-hold function.)
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GALILEO HUD USER MANUAL
17
1.10 Basic settings
The initial activation of your HUD requires
some basic set-up (selecting language,
setting time and date, setting units, etc.).
Starting from the beginning, press-andrelease the push-wheel to turn on the HUD.
After initialization, the HUD will open on the
Surface screen.
From the Surface screen, a press-andrelease of the push-wheel takes you to the
Main menu.
From the Main menu, rotate the pushwheel to toggle down to Settings, then
press-and-release.
Language
In the System menu the rst basic setting
is Language. Press-and-release the pushwheel to enter the menu.
The HUD supports a number of different
languages. (Go to www.scubapro.com to
download more languages.)
By rotating the push-wheel in the Language
menu you can toggle through your
language choices. Conrm your selection
with a press-and-release of the push-wheel
which will also return you to the System
menu.
Time & Date
From the System menu, rotate the pushwheel to toggle down to Time. Push-andrelease.
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From the Settings menu, rotate the pushwheel to toggle down to System, then
press-and-release.
To set both Time and Date, select Set Time
and push-and-release.
GALILEO HUD USER MANUAL
The rst setting is Universal Time
Coordinated (UTC), also known as
Greenwich Mean Time or Zulu Time.
This is the primary time standard used
worldwide to regulate clocks and time.
The HUD provides UTC offset settings that
correspond to your location’s time zone.
These offsets range from -12 hours to
+14 hours in 15-minute increments. This
enables you to have the UTC offset for your
time zone along with the local time.
To set the UTC offset for your location’s
time zone, rotate the push-wheel up or
down, then press-and-release the pushwheel to save your selection. This also
advances you to the Hour setting.
Rotate the push-wheel to select time in
either 24-hour or AM/PM format. Pressand-release to set and advance to Minutes.
Use the same process for Minutes (rotate
the push-wheel to select, press-andrelease to set) then Year, Month and Day.
A press-and-release to set the Day will also
return you to the Time menu.
Time Zone
English
Next, rotate the push-wheel to toggle to
Time Zone. Press-and-release.
This menu screen allows you to easily
change to local time when traveling to
other time zones. Instead of changing the
actual time itself, in this menu you can
add or subtract a number of hours from
the currently displayed time to arrive at the
correct time at your new destination.
If you already set the UTC offset for your
location in the previous Set Time screen,
your Time Zone setting will already be set.
If it’s not, rotate the push-wheel to set the
UTC offset for your location’s time zone,
then press-and-release to save the setting.
If the UTC offset for your time zone has
already been set, simply press-and-release
the push-wheel and you will return to the
Time menu.
Time from GPS
With Time from GPS selected, a push-andrelease of the push-wheel will give you an
at-a-glance status of your GPS reception,
with time and date data coming from the
GPS satellites.
GALILEO HUD USER MANUAL
19
If “OK” appears on the screen you have
GPS signal reception; if no reception is
available, the following symbol is displayed.
For more information on the HUD’s GPS
function, refer to chapter: GPS.
NOTE: the GPS satellite transfers date
F
and time as UTC. If time shifts are
necessary due to region or summer/
winter time, then these must be set
separately.
Time format
The nal setting in the Time menu is Time
Format, where you can select how you
want to see time-of-day – as well as the
current date – presented on the screen.
Press-and-release to enter the Time
Format menu.
First up is Time Format. Press-and-release.
Here you have a choice of 12-hour or 24hour time. Rotate the push-wheel to make
your selection, then press-and-release.
This will return you to the previous Time
Format menu screen.
In the Time Format menu, rotate the pushwheel to toggle to Date Format – pressand-release.
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The HUD gives you a choice of 3 date
formats. Rotate the push-wheel to select
your preference, then press-and-release to
save your selection and return to the Time
Format menu screen.
From the Time menu screen, a press-andhold of the push-wheel takes you back to
the System menu screen.
GALILEO HUD USER MANUAL
English
Setting Units
In the System menu, next on the basic
settings list is Units. Press-and-release the
push-wheel to enter the Units menu.
The rst setting in the Units menu is Depth.
Press-and-release the push-wheel.
In the Depth menu, rotate the push-wheel
to select either Meters or Feet. A pressand-release saves your selection and
returns you to the Units menu.
From the Units menu, rotate the pushwheel to Temperature. Press-and-release.
In the Temperature menu, rotate the pushwheel to select either Celcius or Fahrenheit.
A press-and-release saves your selection
and returns you to the Units menu.
From the Units menu, rotate the pushwheel to Pressure. Press-and-release.
In the Pressure menu, rotate the pushwheel to select either Bar or PSI. A pressand-release saves your selection and
returns you to the Units menu.
From the Units menu, rotate the pushwheel to Distance. Press-and-release.
These are the Unit settings you need for the
GPS orientation.
GALILEO HUD USER MANUAL
In the Distance menu you have a choice
of 4 selections for measuring horizontal
distance. Rotate the push-wheel to make
your selection. A press-and-release saves
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your selection and returns you to the Units
menu.
From the Units menu, a press-and-hold
returns you to the System menu.
Another press-and-hold returns you to the
Settings menu.
One more press-and-hold returns you to
the Surface screen.
NOTE: The HUD doesn’t have a
F
setting for salt water or fresh water.
That’s because it constantly measures
pressure and converts it to a depth
value by using ocean water density
PRESSPRESS AND HOLDTURN PUSH-WHEEL
(1.025 kg/l salt) as a constant. Since
salt water is denser than fresh water,
a depth of 10m/33ft in salt water
corresponds approximately to a depth
of 10.3m/34ft in fresh water. Since the
difference is minimal, and since over
95% of the world’s water is salt water,
the HUD always shows depth in salt
water.
The HUD’s push-wheel rotation, pressand-release and press-and-hold functions
while at the surface and during diving are
summarized in the following table.
SURFACE
SCUBA
APNEA
CCR
Main menuShut down
Main menu
(limited selection)
Main menu
(limited selection)
Main menu
(limited selection)
Gas change to recommended
Finish session when depth
< 0.1m
Setpoint change when requiredChange dive screen
gas
Switch to GPS screen when
activated
Change dive screen
Prole when session is ongoing
& while at the surface
22
GALILEO HUD USER MANUAL
1.11 No-y time
No-y time is the time during which an
exposure to the reduced pressure (equal
to ascending to higher altitudes) inside
the cabin of an airplane could cause
decompression sickness, as calculated by
the decompression model in the computer.
The red no-y 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 HUD displays the NO FLY
countdown timer can result in serious injury
or death.
1.12 SOS
If you surface and then stay above a
depth of 0.8m/3ft for more than 3 minutes
without having observed a prescribed
decompression stop during your justcompleted dive, the HUD will switch
into SOS mode. Once in SOS mode the
HUD will lock up and will be inoperable
as a decompression dive computer for
48 hours. If it is used for diving within 48
hours of an SOS lock, it will automatically
switch to Gauge mode and provide no
decompression information.
The display shows the SOS mode
message.
Instead of the no-y time, the 48-hour
countdown is shown.
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.
• Going to altitude or ying while the HUD
displays the SOS mode can result in serious
injury or death.
NOTE: If the battery becomes fully
F
discharged while at depth in spite
of using the Power Save mode,
the HUD will be locked into Gauge
mode for 48 hours, independent
of the remaining desaturation time.
After the lock expires the HUD remains
in Gauge mode.
English
GALILEO HUD USER MANUAL
23
1.13 Mounting and pairing the
X
high pressure transmitter
The HUD 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.
NOTE: Use an appropriate wrench to
F
tighten the transmitter. Take care to
not overtighten.
The Smart transmitter communicates with
the HUD via radio frequency. For optimal
transmitting performance, we recommend
positioning the transmitter as described in
the following picture.
24
In order for the HUD to display the pressure
signal from a Smart transmitter, a coded
and interference-free line of communication
must rst be established. This step needs
to be performed only once for each
transmitter.
GALILEO HUD USER MANUAL
X
5. Rotate the push-wheel to toggle down
to Settings. Press-and-release.
English
To pair your HUD with the transmitter,
proceed as follows:
1. Mount the rst stage regulator with
Smart transmitter on a full tank.
2. Turn on the HUD. From the Surface
screen press-and-release the pushwheel to get to the Main menu.
3. From the Main menu select Gas and
press-and-release.
4. From the Gas menu select the gas you
want to pair to. A press-and-release will
save your selection (indicated by an “X”
in the box next to the selected gas) and
return you to the Main menu screen.
6. From the Settings menu rotate the
push-wheel to toggle down to Tank
Pairing. Press-and-release.
7. The gas you selected in Step 4 will
be highlighted. Press-and-release the
push-wheel. This will start the pairing
process as a countdown timer starts.
8. As the timer counts down, open the
tank valve. Upon pressurization, the
Smart transmitter will send a pairing
sequence to the HUD.
GALILEO HUD USER MANUAL
25
9. Wait until the transmitter and HUD are
connected. Once a successful pairing
is made the screen will display “OK”
and revert to the Tank Pairing screen.
At the same time, on the Gas menu screen
a green lightning symbol now shows that
the transmitter is paired to that gas.
To pair another transmitter start at Step 3
and repeat the process.
NOTE: The transmitter must have
F
been unpressurized for at least 40
seconds prior to attempting a pairing
operation; if not, 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 pairing will be
erased. However, you can pair more
than one HUD to the same transmitter.
Finally, when performing the pairing
operation, make sure that only one
transmitter is activated within 2.5m/8ft
so that you will pair to the right tank.
After a successful pairing, on the Surface
screen the tank pressure will appear in
either BAR or PSI in the lower left hand
corner, accompanied by a pressure bar
running up the left side of the screen.
26
NOTE: You can extend the timeout
F
period by giving the wheel a short
press.
If at any time you decide to abort the pairing
procedure, press-and-hold the push-wheel
and the HUD will stop the pairing process
and the settings will remain.
Also, the pairing of the selected gas will be
deleted if the timeout countdown goes to 0.
If a NA appears in the lower left hand corner
instead of a pressure value, that means the
HUD is paired but no signal is available.
GALILEO HUD USER MANUAL
NOTE: The Smart transmitter has a
F
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 70 seconds. The
transmitter also turns itself off when
the pressure is 8bar/200psi or less.
If a transmitter battery is weak, the
HUD will alert you with a screen
message displaying.
See chapter: Replacing the battery in
transmitter for information on how to
replace the transmitter battery.
Wireless tank pressure information,
under certain circumstances—such as
inappropriate positioning of the transmitter
or interference from strong RF sources, can
be momentarily interrupted. Strobes used
in underwater photography, for example,
are known to momentarily affect the
communication between the HUD and the
wireless transmitter.
NOTE: If the HUD receives no signal
F
from the transmitter for 30 seconds,
the last received measurement stays
on the display and the RBT calculation
is based on this value.
After another 30 seconds without a
signal, the display changes to “NA”
and the RBT is deleted on the display.
If the signal is re-established, the
measurement and RBT will once again
be displayed.
WARNING
In the event of a “no signal available” situation,
all tank pressure-related information on the
HUD ceases to be valid. In such a case, you
must use a backup instrument for pressure
monitoring and seek a safe ascent to the
surface. Running out of gas under water is
dangerous and may lead to severe injury or
death by drowning.
1.14 Turning off the HUD
The HUD turns off automatically after 5
minutes without active use. When in the
Surface screen, you can turn the HUD
off manually with a press-and-hold of the
push-wheel.
English
GALILEO HUD USER MANUAL
27
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