Suunto D5 Operation Manual

SUUNTO D5

USER GUIDE

2019-06-19

Suunto D5

1. Safety................................................................................................................................................................5

2. Getting started.............................................................................................................................................. 9

2.1. Set Up...................................................................................................................................................9

2.2. Display - modes, views, and states............................................................................................. 9

2.3. Icons...................................................................................................................................................10

2.4. Product compatibility...................................................................................................................... 11

3. Features.........................................................................................................................................................12

3.1. Alarms, warnings and

notifications............................................................................................. 12

3.2. Algorithm lock..................................................................................................................................13

3.3. Ascent rate........................................................................................................................................14

3.4. Battery................................................................................................................................................15

3.5. Bookmark..........................................................................................................................................16

3.6. Clock.................................................................................................................................................. 16

3.7. Compass............................................................................................................................................16

3.7.1. Calibrating compass............................................................................................................ 17

3.7.2. Setting declination.............................................................................................................. 17

3.7.3. Locking the bearing............................................................................................................18

3.8. Customizing with Suunto DM5....................................................................................................19

3.9. Decompression algorithm............................................................................................................ 19

3.9.1. Diver safety.......................................................................................................................... 20

3.9.2. Altitude diving.................................................................................................................... 20

3.9.3. Oxygen exposure............................................................................................................... 21

3.10. Decompression dives................................................................................................................. 22

3.10.1. Last stop depth..................................................................................................................25

3.11. Device info...................................................................................................................................... 25

3.12. Display.............................................................................................................................................25

3.13. Dive history.................................................................................................................................... 25

3.14. Dive modes....................................................................................................................................26

3.14.1. Air / nitrox mode................................................................................................................26

3.14.2. Gauge mode......................................................................................................................28

3.14.3. Freedive mode..................................................................................................................29

3.15. Dive planner.................................................................................................................................. 32

3.16. Gas consumption......................................................................................................................... 32

3.17. Gas mixtures...................................................................................................................................32

3.18. Gas time.......................................................................................................................................... 33

3.19. Idle and deep sleep.....................................................................................................................33

3.20. Language and unit system........................................................................................................34

3.21. Logbook..........................................................................................................................................34

3.22. Oxygen calculations................................................................................................................... 35

3.23. Personal adjustments.................................................................................................................36

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Suunto D5

3.24. Safety stops and deep stops....................................................................................................37

3.25. Sample rate...................................................................................................................................38

3.26. Suunto app....................................................................................................................................38

3.27. Suunto DM5...................................................................................................................................39

3.27.1. Synchronizing logs and settings...................................................................................39

3.27.2. Updating

firmware...........................................................................................................39

3.28. Surface and no-fly time..............................................................................................................40

3.29. Tank pressure...............................................................................................................................40

3.30. Timer................................................................................................................................................41

3.31. Water contacts................................................................................................................................41

4. Use.................................................................................................................................................................43

4.1. How to access device info........................................................................................................... 43

4.2. How to change display brightness............................................................................................43

4.3. How to set language and unit.................................................................................................... 43

4.4. How to set time and date.............................................................................................................44

4.5. How to set the alarm clock..........................................................................................................44

4.6. How to install and pair a Suunto Tank POD............................................................................45

4.7. How to plan a dive using the Dive planner..............................................................................47

4.8. How to customize dive modes with DM5................................................................................48

4.9. How to enable gas consumption metering............................................................................ 50

4.10. How to set depth

notifications (freedive only)......................................................................50

4.11. How to add bookmarks................................................................................................................ 51

5. Care and support.......................................................................................................................................52

5.1. Handling guidelines.......................................................................................................................52

5.2. Installing scratch guard................................................................................................................52

5.3. Quick release strap....................................................................................................................... 53

5.4. Charging battery............................................................................................................................ 53

5.5. Getting support.............................................................................................................................. 54

5.6. Disposal and recyling................................................................................................................... 54

6. Reference.....................................................................................................................................................55

6.1. Technical

specifications................................................................................................................ 55

6.2. Compliance..................................................................................................................................... 57

6.2.1. EU radio directive............................................................................................................... 57

6.2.2. EU Personal Protective Equipment ..............................................................................57

6.2.3. EU depth gauge standard...............................................................................................58

6.2.4. FCC / ISED regulatory notices....................................................................................... 58

6.3. Trademark........................................................................................................................................58

6.4. Patent notice...................................................................................................................................59

6.5. International Limited Warranty...................................................................................................59

6.6. Copyright......................................................................................................................................... 60

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6.7. Menu...................................................................................................................................................61

6.8. Dive Terms........................................................................................................................................61

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Suunto D5

1. Safety

Types of safety precautions

WARNING: - is used in connection with a procedure or situation that may result in

serious injury or death.

CAUTION: - is used in connection with a procedure or situation that will result in

damage to the product.

NOTE: - is used to emphasize important information.

TIP: - is used for extra tips on how to utilize the features and functions of the device.

WARNING: all computers experience failures. It is possible that this device may suddenly
fail to provide accurate information during your dive. Always use a backup dive device and
only dive with a buddy. Only divers trained in proper use of diving equipment should use this
dive device! YOU MUST READ the leaflet and user guide for your dive computer before use.
Failure to do so may lead to improper use, serious injury or death.

Before you dive

Make sure that you fully understand the use, displays and limitations of your dive instruments.
If you have any questions about this manual or dive instrument, contact your Suunto dealer
before diving. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!

Before leaving on a dive trip,inspect your dive computer thoroughly to make sure everything
is functioning properly.

At the dive site, perform your manual pre-checks on each device before entering the water.

Dive Computer Pre-check

Ensure that:

1. Suunto D5 is in the correct dive mode and the display is working as expected.

2. Altitude setting is correct.

3. Personal setting is correct.

4. Deep stops are set correctly.

5. Unit system is correct.

6. Compass is calibrated. Start the calibration manually in the menu under General »

Compass » Calibrate to also

After successful calibration, you should hear a sound.

7. The battery is fully charged.

8. All primary and backup gauges for time, pressure and depth, both digital and mechanical,

are showing correct, consistent readings.

9. If Suunto Tank PODs are in use, check that Suunto Tank POD is properly installed and the

tank valve is open. Please see the Suunto Tank POD User Guide for detailed information

and proper use.

confirm that the dive computer audible sounds are working.

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10. If Suunto Tank PODs are in use, check that connections are working and gas selections

are correct.

NOTE: For Suunto Tank POD related information please see the instructions provided

with the product.

Safety precautions

WARNING: ONLY TRAINED DIVERS SHOULD USE A DIVE COMPUTER! Insucient
training for any kind of diving, including freediving, may cause a diver to commit errors, such
as incorrect use of gas mixtures or improper decompression, that may lead to serious injury
or death.

WARNING: You must read the printed quick guide and online user guide for your dive
computer. Failure to do so may lead to improper use, serious injury or death.

WARNING: THERE IS ALWAYS A RISK OF DECOMPRESSION SICKNESS (DCS) FOR ANY
DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE TABLES OR A
DIVE COMPUTER. NO PROCEDURE, DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE
POSSIBILITY OF DCS OR OXYGEN TOXICITY! An individual’s physiological makeup can vary
from day to day. The dive computer cannot account for these variations. You are strongly
advised to remain well within the exposure limits provided by the instrument to minimize the
risk of DCS. As an added measure of safety, you should consult a physician regarding your
fitness before diving.

WARNING: If you have a pacemaker, we recommend you do not scuba dive. Scuba
diving creates physical stresses on the body which may not be suitable for pacemakers.

WARNING: If you have a pacemaker, consult a doctor before using this device. The
inductive frequency used by the device may interfere with pacemakers.

WARNING: Allergic reactions or skin irritations may occur when product is in contact with
skin, even though our products comply with industry standards. In such event, stop use
immediately and consult a doctor.

WARNING: Not for professional use! Suunto dive computers are intended for recreational
use only. The demands of commercial or professional diving may expose the diver to depths
and conditions that tend to increase the risk of decompression sickness (DCS). Therefore,
Suunto strongly recommends that the device not be used for any commercial or professional
diving activities.

WARNING: USE BACKUP INSTRUMENTS! Ensure that you use backup instrumentation,
including a depth gauge, submersible pressure gauge, timer or watch, and have access to
decompression tables whenever diving with a dive computer.

WARNING: For safety reasons, you should never dive alone. Dive with a designated
buddy. You should also stay with others for an extended time after a dive as the onset of
possible DCS may be delayed or triggered by surface activities.

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Suunto D5

WARNING: PERFORM PRE-CHECKS! Always check that your dive computer is functioning
properly and has the correct settings before diving. Check that the display is working, the
battery level is OK, tank pressure is correct, and so forth.

WARNING: Check your dive computer regularly during a dive. If you believe or conclude
that there is any problem with any computer function, abort the dive immediately and safely
return to the surface. Call Suunto Customer Support and return your computer to an
authorized Suunto Service Center for inspection.

WARNING: THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED BETWEEN
USERS WHILE IT IS IN OPERATION! Its information will not apply to someone who has not
been wearing it throughout a dive, or sequence of repetitive dives. Its dive profiles must
match that of the user. If it is left on the surface during any dive, the dive computer will give
inaccurate information for subsequent dives. No dive computer can take into account dives
made without the computer. Thus, any diving activity up to four days prior to initial use of the
computer may cause misleading information and must be avoided.

WARNING: DO NOT EXPOSE ANY PART OF YOUR DIVE COMPUTER TO ANY GAS MIX
CONTAINING MORE THAN 40% OXYGEN! Enriched air with greater oxygen content presents
a risk of fire or explosion and serious injury or death.

WARNING: DO NOT DIVE WITH A GAS IF YOU HAVE NOT PERSONALLY VERIFIED ITS
CONTENTS AND ENTERED THE ANALYZED VALUE INTO YOUR DIVE COMPUTER! Failure to
verify tank contents and enter the appropriate gas values where applicable into your dive
computer will result in incorrect dive planning information.

WARNING: Using a dive planner software such as in Suunto DM5 is not a substitute for
proper dive training. Diving with mixed gases has dangers that are not familiar to divers
diving with air. To dive with Triox, Heliox and Nitrox or all of them, divers must have
specialized training for the type of diving they are doing.

WARNING: Do not use Suunto USB Cable in areas where flammable gases are present.
Doing so may cause an explosion.

WARNING: Do not disassemble or remodel Suunto USB Cable in any way. Doing so may
cause an electric shock or

fire.

WARNING: Do not use Suunto USB cable if cable or parts are damaged.

WARNING: You must only charge your device using USB adapters that comply with the
IEC 60950-1 standard for limited power supply. Non-compliant adapters are a fire hazard and
a risk to personal injury and might damage your Suunto device.

CAUTION: DO NOT allow the connector pins of the USB cable to touch any conductive
surface. This may short circuit the cable, making it unusable.

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Suunto D5

NOTE: Make sure your Suunto dive computer always has the latest software with
updates and improvements. Check before every dive trip from www.suunto.com/support, if
Suunto has released a new software update to your device. When it is available, you must
install it before diving. Updates are made available to improve your user experience and are
part of Suunto´s philosophy of continuous product development and improvement.

Emergency ascents

In the unlikely event that the dive computer malfunctions during a dive, follow the emergency
procedures provided by your certified dive training agency to immediately and safely ascend.

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Suunto D5

2. Getting started

2.1. Set Up

To get the most out of your Suunto D5, use some time to customize features and dive views.
Make absolutely sure that you know your computer and have it set up as you want before
getting into the water.

To get started:

1. Wake up the device by connecting the USB cable to a PC/Mac or a power source. Use a

USB port of 5 Vdc, 0.5A.

2. Follow the startup wizard to set up the device. When ready, the device goes to surface

state.

3. Fully charge before first dive.

The startup wizard guides you through:

•

Language

•

Units

•

Time format (12h/24h)

•

Date format (dd.mm / mm.dd)

•

Time and date

•

Connecting with Suunto app (optional)

2.2. Display - modes, views, and states

Your Suunto D5 has three buttons that have
pressing or long pressing them gets you to dierent functionalities.

dierent functions in dierent views. Short

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Suunto D5

Suunto D5 has three main dive modes: Air / Nitrox, Gauge and Free.

Press and hold the middle button to enter Main menu and select the appropriate mode for
your dive under Dive settings » Mode. Select O if you want use Suunto D5 as a regular
watch. In this case all dive functionalities are switched o.

Suunto D5 automatically restarts to change mode.

Dierent dive modes have dierent views. Some views are available by default, some of them
can be made available through customization in DM5. See 3.8. Customizing with Suunto DM5.

For more detailed information on the views availabe in the dierent modes, see 3.14. Dive
modes.

Suunto D5 automatically switches between surface and dive state. If you are more than 1.2 m
(4 ft) below the water level and water contact is on, the dive state is activated.

In a default dive display, you see the following information:

The switch window has diferrent information that can be changed by short pressing the lower
button.

For a complete map of the available menu items within your Suunto D5, see 6.7. Menu.

2.3. Icons

Suunto D5 uses the following icons:

Water contact

Device is functioning abnormally (e.g. water contact is not working as
expected)

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Suunto D5

No-fly time

Surface (interval) time

Bluetooth

Airplane mode

Alarm clock

Battery status (for device: ok, charging, low, low-recharge needed; for Tank
POD: low)

Battery level - number indicates remaining diving time

Vibration alarm on

Sound and vibration alarm on

2.4. Product compatibility

Suunto D5 can be used together with Suunto Tank POD for wireless transmission of tank
pressure to the dive computer. Multiple Tank PODs can be paired with the dive computer.

This dive computer can also be paired with the Suunto app over Bluetooth. With the app you
can transfer dive logs to Suunto app.

You may also connect this dive computer to a PC or Mac with the supplied USB cable and use
Suunto DM5 to modify device settings, plan dives, as well as update the dive computer
software when an update is available.

Do not use this dive computer with any unauthorized accessories or attempt to connect
wirelessly with mobile apps or equipment not authorized or

ocially supported by Suunto.

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Suunto D5

3. Features

3.1. Alarms, warnings and notifications

Suunto D5 has color-coded alarms, warnings and notifications. They are shown prominently
on the display with an audible alarm (if tones are on). Alarms are always red. Warnings may be
red or yellow.

Suunto D5 has vibration alarm. The vibration can be turned on or o for dive alarms,
notifications and warnings.

Alarms are critical events that always require immediate action. When an alarm situation
comes back to normal, the alarm will stop automatically.

Notifications are always yellow.

Alarm

Warnings alert you to events that can impact your health and safety if you do not take action.
Acknowledge the warning by pressing any button.

Explanation

Ascent speed exceeds safe speed of 10 m (33 ft) per
minute for five seconds or more.

Decompression ceiling broken by more than 0.6 m (2 ft)
on a decompression dive. Immediately descend back
below ceiling depth and continue to ascend normally.

Partial pressure of oxygen exceeds safe level (>1.6).
Immediately ascend or change to a gas with lower
oxygen percentage.

Warning

CNS 100% Central nervous system toxicity level at 100% limit

OTU 300 Recommended daily limit for Oxygen tolerance unit

Depth Depth exceeds your depth alarm limit

Dive time Dive time exceeds your dive time alarm limit

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Explanation

reached

Suunto D5

Warning Explanation

Gas time Gas time is below your gas time alarm limit, or tank

pressure is below 35 bar (~510psi), in which case gas
time is zero.

Safety stop broken Mandatory safety stop ceiling broken by more than 0.6

m (2 ft)

Tank pressure Tank pressure is below your tank pressure alarm limit.

There is a built in 50-bar alarm that cannot be changed.
In addition to it there is a configurable tank pressure
alarm, you can set to any value and your dive computer
also shows an alarm when that value and 50 bar
pressures are reached. The tank pressure number is
forced onto the display and turns yellow after the value
you set and red after 50 bar.

Notifications indicate events that require preventive actions. Acknowledge the notification by
pressing any button.

Notification

CNS 80% Central nervous system toxicity level at 80% limit

OTU 250 Approximately 80% of recommended daily limit for OTU

Change gas On multi-gas dive when ascending, it is safe to switch to

Battery low Approximately three hours of dive time left

Recharge needed Approximately two hours of battery time left; re-charging

Tank POD low battery Tank POD battery life low; battery change required

Explanation

reached

next available gas for optimum decompression profile

required before next dive

3.2. Algorithm lock

Breaking the decompression ceiling

When you ascend above the ceiling by more than 0.6 m (2 ft), the ceiling parameter turns red,
a red arrow pointing down appears, and an audio alarm is generated.

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Suunto D5

In such event, you should descend below the ceiling level to continue the decompression. If
you fail to do so within three (3) minutes, Suunto D5 locks the algorithm calculation and
displays Locked instead, as shown below. Note that the ceiling value is no longer present.

Algorithm locked

Suunto Fused™ RGBM 2 algorithm is locked for 48 hours if you omit to take decompression
stops for longer than three (3) minutes. When the algorithm is locked, no algorithm information
is available and Locked is shown instead. Locking the algorithm is a safety feature,
highlighting that the algorithm information is no longer valid.

Algorithm locked in Timer view:

Algorithm locked in No Deco view:

In this state, you significantly increase your risk of decompression sickness (DCS).
Decompression information is not available for the next 48 hours after surfacing.

It is possible to dive with the device when the algorithm is locked, but instead of the
decompression information, Locked is shown. Diving while the algorithm is locked resets the
algorithm lock time back to 48 hours when you surface.

3.3. Ascent rate

During a dive, the bar on the left indicates ascent rate. One bar step corresponds to 2 m (6.6
ft) per minute.

The bar is also color coded:

•

Green indicates ascent rate is ok, less than 8 m (26.2 ft) per minute

•

Yellow indicates ascent rate is moderately high, 8-10 m (26-33 ft) per minute

•

Red indicates ascent rate is too high, over 10 m (33 ft) per minute

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Suunto D5

When maximum allowed ascent rate is exceeded for five seconds, an alarm is generated.
Ascent rate violations result in longer safety stop times and mandatory safety stops.

WARNING: DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase the
risk of injury. You should always make the mandatory and recommended safety stops after
you have exceeded the maximum recommended ascent rate. If this mandatory safety stop is
not completed the decompression model will penalize your next dive(s).

3.4. Battery

Suunto D5 has a rechargeable lithium-ion battery. Charge the battery by connecting Suunto
D5 to a power source with the included USB cable. As a power source use a USB port of
5Vdc, 0.5A.

The battery icon in the bottom of the display shows the battery status.

Icon

For Suunto D5 the battery and charging notifications are as follows:

When USB is connected for charging and every time you press a button during that time, the
following pop-up notification appears:

When charging from a wall outlet you will see the following screen:

Explanation

Battery level is OK.

Battery level is low. Less than 3 hrs left.

Battery level is low. Less than 2 hrs left. Recharge needed.

Battery is charging.

In watch view, dive views (but not during dives), and during dives a yellow 'Battery low' pop­up appears (see below) when there is less than 3 (three) hours left from battery time. If you
press any button the pop-up disappears.

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Suunto D5

When the time left decreases to 2 (two) hours a 'Recharge needed' red pop-up notification
appears. The red pop-up will stay on the screen on top of everything else and you cannot
make it disappear until the device is charged or you change to time view. In case of scuba
diving, when the charge level drops below 2 (two) hours, you cannot start a dive with Suunto
D5. For freediving the limit is 30 minutes.

During a dive the red battery icon (see above) is displayed. The notification pop-up comes
only on the surface so it will not cover information on the display during a dive.

When the battery runs empty, a charging symbol on a blank screen notifies you to recharge
your Suunto D5.

3.5. Bookmark

Adding a bookmark (timestamp) to an active log is really easy in Suunto D5. See 4.11. How to
add bookmarks for the procedure.

3.6. Clock

Suunto D5's time and date settings are found under Device settings.

Time and date formats are found under Units & formats. For setting, see 4.4. How to set time
and date.

A daily alarm can be activated under Main menu » Alarm clock. For more information, see

4.5. How to set the alarm clock.

Sound and vibration are always on by default. This setting cannot be changed for the alarm
clock.

3.7. Compass

By repeatedly short pressing the middle button brings up the compass. First calibrate the
compass, for more information see 3.7.1. Calibrating compass.

The information on the display depends on which mode you are in.

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Suunto D5

In Air / Nitrox mode, you will see the following information in compass view:

In the switch window, you see the heading in numeric format.

In the Compass menu you can turn the bearing on or o, calibrate the compass, and set
declination.

3.7.1. Calibrating compass

When you first start using Suunto D5, and after each charging, the compass needs to be
calibrated and it is required to do so to activate it. Suunto D5 displays the calibration icon
when you enter the compass view.

During the calibration process, the compass adjusts itself to the surrounding magnetic field.

Because of changes in the surrounding magnetic field, it is recommended to re-calibrate the
compass before each dive.

To manually start calibration:

1. Take o your Suunto D5.

2. Keep the middle button pressed to enter the menu.

3. Browse to General / Compass.

4. Press the middle button to enter Compass.

5. Scroll up or down to select Calibrate.

6. Start calibrating the device by trying to move it around the xyz axels of the coordinate

system (like you were drawing a small circle) so that the magnetic

field is as stable as
possible during the calibration. To achieve this, try to keep Suunto D5 in the same location
and do not move it around using large movements.

7. Repeat the rotation as long as the compass calibration is successful.

8. A sound indicates when the calibration succeeded, and the screen goes back to Compass
menu.

NOTE: If the calibration fails several times in a row, you may be in an area with strong
sources of magnetism, such as large metal objects. Move to another location and try to
calibrate the compass again.

3.7.2. Setting declination

You should always adjust your compass declination for the area where you are diving to get
accurate heading readings. Check the local declination from a trusted source and set the
value in Suunto D5.

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Suunto D5

To set declination:

1. Keep the middle button pressed to enter the menu.

2. Browse to General / Compass.

3. Press the middle button to enter Compass.

4. Press the middle button again to enter Declination.

5. Scroll up/down to set the angle of declination: Starting from 0.0º scroll up towards East or

down towards West declination. To turn declination

o, set declination angle to 0.0º.

6. Press middle button to save changes and go back to the Compass menu.

7. Keep the middle button pressed to exit.

3.7.3. Locking the bearing

A bearing is the angle between north and your target. In simple terms, it is the direction you
want to travel. Your heading, on the other hand, is your actual direction of travel.

You can set a bearing lock to help you orientate yourself underwater and ensure you maintain
your direction of travel. For example, you can set a bearing lock for the direction to the reef
before leaving the boat.

You can reset the bearing lock at any time, but you can only clear a bearing lock while at the
surface.

To lock the bearing:

1. Press the middle button to change to compass view.

2. Hold your Suunto D5 in level in front of you, with the top pointing in the direction to your

target.

3. Keep the lower button pressed until you see the Bearing locked

notification.

After you locked the bearing, you can see yellow bars to indicate the angle where you locked
the bearing:

When the bearing is at 0°, no arrows are shown beside the value, as above. When the bearing
is at 180°, two yellow arrows are shown beside the value:

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Suunto D5

One yellow arrow indicates the direction you need to turn:

If you want to set a new bearing lock, just repeat the same procedure above. Each bearing
lock is recorded in your dive log with a time stamp.

To clear the bearing lock from your compass view, you need to return to the surface.

To clear a bearing lock:

1. While in surface state, keep the middle button pressed to enter the main menu.

2. Scroll to General with the upper or lower buttons and press the middle button.

3. Press the middle button to enter Compass.

4. Select Clear bearing with the middle button.

3.8. Customizing with Suunto DM5

You can customize Suunto D5 views and features with Suunto DM5. Create up to 10 dierent
dive modes with up to five custom views each.

NOTE: When creating or modifying dive modes, you need to synchronize the changes
with your Suunto D5 before disconnecting the USB cable to save the changes to your device.

Customization can be done in four categories:

•

Dive mode name

•

Dive algorithm

•

Gas settings

•

Customize views

Dive mode name has a 15-character limit, you can select Suunto Fused™ RGBM 2 or no
algorithm for Dive algorithm.

For Gas settings, the GAS menu content can be

For each dive mode, you can create up to five custom views.

For more details, see 4.8. How to customize dive modes with DM5.

configured.

3.9. Decompression algorithm

Suunto's decompression model development originates from the 1980s when Suunto
implemented Bühlmann's model based on M-values in Suunto SME. Since then research and
development has been ongoing with the help of both external and internal experts.

In the late 1990s, Suunto implemented Dr. Bruce Wienke's RGBM (Reduced Gradient Bubble
Model) to work with the earlier M-value based model. The
feature were the iconic Suunto Vyper and Suunto Stinger. With these products the
improvement of diver safety was significant as they addressed a number of diving
circumstances outside the range of dissolved-gas-only models by:

•

Monitoring continuous multiday diving

first commercial products with the

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Suunto D5

•

Computing closely spaced repetitive diving

•

Reacting to a dive deeper than the previous dive

•

Adapting to rapid ascents which produce high microbubble (silent-bubble) build-up

•

Incorporating consistency with real physical laws for gas kinetics

The Suunto Fused™ RGBM 2 combines and improves widely respected Suunto RGBM and
Suunto Fused™ RGBM decompression models developed by Suunto together with Dr. Bruce
Wienke. (Suunto dive algorithms are a culmination of expertise and knowledge accumulated
over decades of development, testing and thousands upon thousands of dives.)

In Suunto Fused™ RGBM 2 the tissue half-times are derived from Wienke’s FullRGBM where
human body is modeled by

fifteen dierent tissue groups. FullRGBM can utilize these
additional tissues and model the on-gassing and o-gassing more accurately. The amounts of
nitrogen and helium on-gassing and

o-gassing in the tissues are calculated independently

from each other.

The Fused™ RGBM 2 supports open-circuit and closed-circuit diving up to a depth of 150
meters. Compared to previous algorithms, Fused™ RGBM 2 is less conservative on deep air
dives, allowing shorter ascent times. In addition, the algorithm no longer requires tissues to
be completely free of residual gases when calculating

no-fly times, thereby reducing the

required time between your last dive and flying.

The advantage of Suunto Fused™ RGBM 2 is additional safety through its ability to adapt to a
wide variety of situations. For recreational divers it may oer slightly longer no- deco times,
depending on the chosen personal setting. For open-circuit technical divers it allows use of
gas mixes with helium - on deeper and longer dives helium based gas mixes provide shorter
ascent times. And

finally, for rebreather divers the Suunto Fused™ RGBM 2 algorithm gives the

perfect tool to be used as a non-monitoring, set point dive computer.

NOTE: Suunto D5 does not have Trimix diving or CCR support.

3.9.1. Diver safety

Because any decompression model is purely theoretical and does not monitor the actual
body of a diver, no decompression model can guarantee the absence of DCS. Experimentally
it has been shown that the body adapts to decompression to some degree when diving is
constant and frequent. Two personal adjustment settings (P-1 and P-2) are available for divers
who dive constantly and are ready to accept greater personal risk.

CAUTION: Always use the same personal and altitude adjustment settings for the actual
dive and for the planning. Increasing the personal adjustment setting from the planned
setting as well as increasing the altitude adjustment setting can lead to longer
decompression times deeper and thus to larger required gas volume. You can run out of
breathing gas underwater if the personal adjustment setting has been changed after dive
planning.

3.9.2. Altitude diving

WARNING: Traveling to a higher elevation can temporarily cause a change in the
equilibrium of dissolved nitrogen in the body. It is recommended that you acclimatize to the
new altitude before diving.

The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a
higher altitude, you will have additional nitrogen in your body, compared to the equilibrium

20

Suunto D5

situation at the original altitude. This 'additional' nitrogen is released gradually over time and
equilibrium is restored. It is recommended that you acclimatize to a new altitude by waiting at
least three hours before making a dive.

Before high-altitude diving, you need to adjust the altitude settings of your dive computer so
that the calculations take into account the high altitude. The maximum partial pressures of
nitrogen allowed by the mathematical model of the dive computer are reduced according to
the lower ambient pressure.

This setting automatically adjusts the decompression calculation according to the given
altitude range. You can

find the setting under Dive settings » Parameters » Altitude and

select from three ranges:

•

0 – 300 m (0 – 980 ft) (default)

•

300 – 1500 m (980 – 4900 ft)

•

1500 – 3000 m (4900 – 9800 ft)

As a result, the allowed no decompression stop limits are considerably reduced.

WARNING: SET THE CORRECT ALTITUDE SETTING! When diving at altitudes greater
than 300 m (1000 ft), the altitude setting must be correctly selected in order for the computer
to calculate the decompression status. The dive computer is not intended for use at altitudes
greater than 3000 m (10000 ft). Failure to select the correct altitude setting or diving above
the maximum altitude limit will result in erroneous dive and planning data.

3.9.3. Oxygen exposure

The oxygen exposure calculations are based on currently accepted exposure time limit tables
and principles. In addition to this, the dive computer uses several methods to conservatively
estimate the oxygen exposure. For example:

•

The displayed oxygen exposure calculations are raised to the next higher percentage

value.

•

The CNS% limits up to 1.6 bar (23.2 psi) are based on 1991 NOAA Diving Manual limits.

•

The OTU monitoring is based on the long-term daily tolerance level and the recovery rate

is reduced.

Oxygen related information displayed by the dive computer is also designed to ensure that all
warnings and displays occur at the appropriate phases of a dive. For example, the following
information is provided before and during a dive when the computer is set in Air/Nitrox:

•

The selected O2% (and possible helium %)

•

CNS% and OTU

•

Audible

exceeded

•

Notifications when OTU reaches 250 and then again when 300 limit is exceeded

•

Audible alarm when pO2 value exceeds the preset limit (pO2 high alarm)

WARNING: WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM
LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN
EXPOSURE. Failure to take action to reduce oxygen exposure after a CNS%/OTU warning is
given can rapidly increase the risk of oxygen toxicity, injury, or death.

notification when CNS% reaches 80%, then notification when 100% limit is

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Suunto D5

3.10. Decompression dives

When on a decompression (deco) dive you exceed the no-decompression limit, Suunto D5
provides the decompression information required for ascent. Ascent information is always
presented with two values:

•

Ceiling: depth that you should not go above

•

Asc. time: optimum ascent time in minutes to surface with given gases

WARNING: NEVER ASCEND ABOVE THE CEILING! You must not ascend above the
ceiling during your decompression. In order to avoid doing so by accident, you should stay
somewhat below the ceiling.

WARNING: When diving with multiple gases, remember that the ascent time is always
calculated with the assumption that you use all the gases found in the Gases menu. Always
check that you have only the gases for your current planned dive
Remove the gases that are not available for the dive.

On a decompression dive, there could be three kinds of stops:

defined before you dive.

•

Safety stop: this is a recommended three-minute stop for every dive over 10 meters (32.8

ft).

•

Deep stop: this is a recommended stop when you dive deeper than 20 m (65.6 ft).

•

Decompression stop: this is a compulsory stop on your decompression dive that is for

your safety, preventing decompressions sickness.

In Dive settings » Parameters, you can

•

turn deep stops on or

•

adjust the safety stop time to be 3, 4 or 5 minutes (default is 3 minutes)

•

set last stop depth to 3.0 m or 6.0 m (default is 3.0 m)

o (it is on by default)

The following illustration shows a decompression dive where the ceiling is at 17.7 m (58 ft):

From bottom to top you see the following in the above image:

22

Suunto D5

1. There is a decompression window (Deco window) that is the distance between the

decompression ceiling (Deco ceiling) plus 3.0 m (9.8 ft) and the decompression ceiling. So

the decompression window in this example is between 20.7 m (68 ft) and 17.7 m (58 ft).

This is the area where decompression takes place. The closer to the ceiling you stay, the

more optimal the decompression time is.

When you ascend close to the ceiling depth and enter the decompression window area,

two arrows appear in front of the depth number. The downward and upward pointing

white arrows indicate that you are within the deco window.

2. If you ascend above the ceiling depth, there is still a safe margin area, equaling to ceiling

depth minus 0.6 meters (2 ft). So in this example, it is between 17.7 m (58 ft) and 17.1 m (56

ft). In this safe margin area, decompression calculation still continues, but you are advised

to go down below ceiling depth. This is indicated by the ceiling depth number turning

yellow with a downward pointing yellow arrow in front of the depth number.

3. If you go above the safe margin area, the decompression calculation is paused until you

go back down below this limit. An audible alarm and a red downward arrow in front of the

depth number indicate unsafe decompression.

If you ignore the alarm and stay above the safe margin for three minutes, Suunto D5 locks

the algorithm calculation, and decompression information will not be available anymore on

the dive. See 3.2. Algorithm lock.

Decompression display examples

Below is a typical decompression dive view showing ascent time and the first required deep
stop at 20.3 meters:

Suunto D5 shows the ceiling value always from the deepest of these stops. Deep stop and
safety stop ceilings are always at constant depth when you are at the stop. Stop time is
counted down in minutes and seconds.

In the below display, the stop depth is set to 9.0 m and the diver is currently at 9.1 m. White
arrows beside the depth value show the diver is inside the stop window. 1' 28 is shown in a
yellow

field in the switch window as the time for an optional stop:

The below display shows that the stop depth is set to 3.0 m and the diver is at 3.6 m. The
white arrows indicate again that the diver is inside the stop window. 3' 29 is shown in a red
field in the switch window as the time for a compulsory stop:

23

Suunto D5

The next example shows that the diver is at 2.4 m (stop depth is still set to 3.0 m), so inside
the stop window but above the limit. A yellow downward pointing arrow indicates the diver is
recommended to descend to be at optimal depth. The optimal depth (the stop depth) of 3.0 m
is displayed in yellow:

Now the stop depth is set to 10.0 m and the diver is at 8.5 m. The diver is outside of the stop
window and must descend. A red arrow prompts the diver to dive deeper and the stop depth
is indicated in red:

NOTE: If the ceiling is broken for more than 3 minutes, the decompression algorithm

gets locked.

Below is an example of what Suunto D5 displays during deep stop:

With decompression stops, the ceiling is always decreasing while you are near the ceiling
depth, providing continuous decompression with optimum ascent time.

NOTE: It is always recommended to keep close to the decompression ceiling when

ascending.

Ascent time is always the minimum time needed to reach the surface. It includes:

•

Time required for deep stops

•

Ascent time from depth at 10.0 m (32.8 ft) per minute

•

Time needed for decompression

24

Suunto D5

WARNING: When diving with multiple gases, remember that the ascent time is always
calculated with the assumption that you use all the gases found in the Gases menu. Always
check that you have only the gases for your current planned dive
Remove the gases that are not available for the dive.

WARNING: YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE
DIVE COMPUTER! The ascent time will increase if you: (1) remain at depth, (2) ascend slower
than 10 m/min (33 ft/ min), (3) make your decompression stop deeper than at the ceiling,
and/or (4) forget to change the used gas mixture. These factors might also increase the
amount of breathing gas required to reach the surface.

defined before you dive.

3.10.1. Last stop depth

You can adjust the last stop depth for decompression dives under Dive settings »
Parameters » Last stop depth. There are two options 3 and 6 m (10 and 20 ft).

By default, the last stop depth is 3 m (10 ft). This is the recommended last stop depth.

NOTE: This setting does not aect the ceiling depth on a decompression dive. The last

ceiling depth is always 3 m (10 ft).

3.11. Device info

Information about your Suunto D5 can be found in your device. This information includes
device name, serial number, device history, software and hardware versions and radio
compliance information. See 4.1. How to access device info.

3.12. Display

Display LED backlight is on by default.

You can
ambient light available. The display is still easily readable.

For display brightness adjustment, see 4.2. How to change display brightness.

significantly extend battery life by turning down the display brightness when there is

3.13. Dive history

Dive history is a summary of all the dives done with your Suunto D5. The history is divided
according to the dive mode used for the dive. Each dive type summary includes the number
of dives, cumulative dive hours and maximum depth reached in all dives of that dive mode.

Enter History under General » About D5:

25

Suunto D5

NOTE: If there is more history information available than can be shown in a single

screen, you can scroll through the additional information with the upper and lower buttons.

3.14. Dive modes

By default, Suunto D5 has three dive modes: Air / Nitrox, Free and Gauge (bottom timer).
Select the appropriate mode for your dive under Dive settings »Mode. If you select
Suunto D5 can be used as a regular watch. In this case, all dive functionalities are switched

o.

O, your

3.14.1. Air / nitrox mode

Air mode is for diving with regular air.

Nitrox mode is for diving with oxygen-enriched gas mixtures.

Diving with Nitrox allows you to increase bottom times or reduce the risk of decompression
illness. However, when the gas mix is altered or depth increased, the oxygen partial pressure
is generally increased. Suunto D5 provides you with information to adjust your dive and stay
within safe limits.

In Nitrox mode, both the percentage of oxygen in your tank and the oxygen partial pressure
limit must be entered into Suunto D5.

This ensures correct nitrogen and oxygen calculations and the correct maximum operating
depth (MOD), which is based on your entered values.

The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial pressure (PO2)
setting is 1.6 bar (20 psi).

Air/ Nitrox mode has four views:

•

No deco - The arch shows the no deco time.

•

Compass

26

Suunto D5

•

Tank Pressure - For more information on what is shown on the display, see 3.29. Tank

pressure.

•

Timer (visible after customizing with DM5 - The green triangles going up indicate one

second.

3.14.1.1. Multi-gas diving

Suunto D5 allows gas changes during a dive between the gases defined in the Gases menu.
When ascending, you are always notified to change gases when a better gas is available.

For example, you may have the following gases when diving to 40 m (131.2 ft):

•

Nitrox 26% (1.4 ppO2) (for bottom)

•

Nitrox 50% (1.6 ppO2) (decompression gas)

•

Nitrox 99% (1.6 ppO2) (decompression gas)

While ascending, you are notified to change gas at 22 m (72 ft) and 6 m (19.7 ft) according to
the maximum operating depth (MOD) of the gas.

A pop-up notifies you when to change gases, as shown below:

NOTE: When Suunto D5 recognizes a better gas is available in the gas list, a pop-up

message appears to change gas.

WARNING: When diving with multiple gases, remember that the ascent time is always
calculated with the assumption that you use all the gases found in the Gases menu. Always
check that you have only the gases for your current planned dive defined before you dive.
Remove the gases that are not available for the dive.

27

Suunto D5

NOTE: Air/Nitrox dive mode has only one gas in the gas list by default. The Gases menu
under this mode will not allow you to add more than one gas. You can activate it by turning
multigas diving on in the menu. See also 4.8. How to customize dive modes with DM5.

To add more gases, activate the multi gas diving by setting Multiple gases 'On' under Dive
settings » Mode » Parameters. Your Suunto D5 will restart to save changes. When multiple

gases are activated, you can add three gases in total.

You can create additional dive modes using Suunto DM5. See 4.8. How to customize dive
modes with DM5.

3.14.1.2. Modifying gases during a dive

Modifying gases is for emergency cases only. For example, due to unforeseen events, a diver
might lose a gas mixture, in which case the diver could adjust to the situation by deleting that
gas mixture from gas list Suunto D5. This allows the diver to continue to dive and get correct
decompression information calculated the dive computer.

In another case, if for some reason a diver runs out of gas and needs to use a gas mixture
from a dive buddy, it is possible to adapt Suunto D5 to the situation by adding the new gas
mixture to the list. Suunto D5 re-calculates decompression and shows the correct information
for the diver.

NOTE: This feature is not enabled by default, it must be activated and creates an
additional step to the gas menu during the dive. It is only available if multiple gases are
selected for the dive mode.

To enable modifying gases, turn the feature on in the settings menu under Dive settings /
Parameters / Modify gases.

When enabled, during a multi-gas dive, you can add a new gas as well as select an existing
gas from the gas list to remove it.

3.14.2. Gauge mode

Use Suunto D5 as a bottom timer with Gauge mode.

The timer in the center of the display shows dive time in minutes and seconds and activates
at the start of the dive.

NOTE: Gauge mode is a bottom timer only and thus includes no decompression
information or calculations.

Gauge mode has three views:

•

Timer

•

Compass

28

Suunto D5

•

Tank Pressure - For more information on what is shown on the display, see 3.29. Tank
pressure.

•

NOTE: After diving in gauge mode, decompression calculation is locked for 48 hours.
If during this time you dive again, there is no decompression calculation available and
Locked is shown in decompression information

fields.

3.14.3. Freedive mode

With Free mode, Suunto D5 can be used as a freediving instrument.

Go to Main menu » Dive settings to activate Free Mode. Suunto D5 will restart to change
mode. When you activate Free Mode the display shows you data in white color. Depth is
indicated in the unit you set (see 4.3. How to set language and unit), dive time in minutes and
seconds in the center of the display. Temperature information is at the bottom of the display.
With the lower button you can change the window at the bottom of the display.

The freedive starts at 1.2 m (4 ft) with water contact or 3.0 m (9.8 ft) without water contact and
ends when your depth is less than 0.9 m (3 ft) with water contact or 3.0 m (9.8 ft) without
water contact. For more information on the water contact sensor see 3.31. Water contacts.

Freedive mode has three views by default:

•

Time

•

Depth

•

Compass

•

Timer (only available after customizing)

You can change the views with short pressing the middle button.

Time

Before dives:

During dives:

29

Suunto D5

Depth

Before dives:

During dives:

It is the default view. The white arrow on the left side of the arch moves according to the
depth. The yellow arch shows the depth between the max depth (defined by Depth notify 5)
and the next deepest active depth notification.

Compass

Before dives:

During dives:

Timer

This view is only available after customization.

Before dives:

30

Suunto D5

During dives:

On the surface after freediving

When you are on the surface after freediving, the data on the display turns green. You can
view your last depth, the time of your last dive, and the number of dives you have done (white
number with a hashtag).

Surface notify

In Timer view the surface interval time is being counted in minutes and seconds at the bottom
of the display in a green field until the value you set in Main menu » Dive settings »
NOTIFICATIONS » Surface notify.

If Surface notify is o, the surface interval counter runs for 4 hours, after that, or after the
previously set surface interval time has passed, the counter disappears from the display. Your
Suunto D5 will show the following data:

Under the surface time icon , the time spent on the surface is shown in hours and minutes
in white color.

For setting depth notifications, see 4.10. How to set depth notifications (freedive only).

31

Suunto D5

3.14.3.1. Surface timer

While freediving, you can use the surface timer to help you prepare yourself for you next dive.
Suunto D5 starts the counter as soon as you reach 0.9 m (2.9 ft).

3.15. Dive planner

The dive planner in Suunto D5 helps you to quickly plan your next dive. The planner displays
available no decompression time and gas times for your dive based on depth, tank size and
gas consumption set.

The dive planner can also help you plan dives in series, taking into account the residual
nitrogen from your previous dive(s) based on the planned surface time you enter.

NOTE: It is important to adjust tank size, tank pressure and personal gas consumption

to get the gas calculations right.

See 4.7. How to plan a dive using the Dive planner for details on planning your dives.

3.16. Gas consumption

Gas consumption refers to your real-time consumption rate of gas during a dive. In other
words, it is the amount of gas a diver would use in one minute on the surface. This is
commonly known as your surface air consumption or SAC rate.

Gas consumption rate is measured in liters per minute (cubic feet per minute). This is an
optional

For enabling gas consumption metering, see 4.9. How to enable gas consumption metering.

field and needs to be added to your custom dive mode views in DM5.

3.17. Gas mixtures

If Air / Nitrox dive mode is selected, you need to
algorithm to work properly. You
change O2 percentage and PO2 value.

NOTE: When you have analyzed your gas, you should round the result down when
entering it for Suunto D5. For example, if the analyzed gas is 31.8% oxygen, then define the
gas as 31%. This makes the decompression calculations safer.

define the gases under Gases. In Air / Nitrox mode you can

define the gas(es) for the decompression

WARNING: THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENTAGE
VALUES OF OXYGEN CONCENTRATION. DO NOT ROUND UP FRACTIONAL PERCENTAGES!
Rounding up will cause nitrogen percentages to be understated and will
decompression calculations.

NOTE: You can customize what you see in the Gases menu. See 3.8. Customizing with

Suunto DM5.

32

aect

Suunto D5

3.18. Gas time

Gas time refers to remaining air (gas) left with current gas mixture, measured in minutes. The
time is based on tank pressure value and your current breathing rate.

Gas time is also highly dependent on your current depth. For example, all other factors being
the same, including breathing rate, tank pressure and tank size, depth aects gas time as
follows:

•

At 10 m (33 ft, surrounding pressure 2 bar), gas time is 40 minutes.

•

At 30 m (99 ft, surrounding pressure 4 bar), gas time is 20 minutes.

•

At 70 m (230ft, surrounding pressure 8 bar), gas time is 10 minutes.

Gas time can be viewed at the bottom of dive mode screens. If you have not paired a Suunto
Tank POD, the gas time
received, the
or the POD battery is low.

field shows - -. This may be because the POD is not in range, the tank is closed,

field shows N/A. If you have paired a POD but there is no data being

NOTE: It is important to adjust tank size, tank pressure and personal gas consumption

to get the gas calculations right.

3.19. Idle and deep sleep

Idle and deep sleep are functions that are designed to prolong battery life.

Idle

When you press any button on your Suunto D5, it goes to active mode and the display
backlight is activated (if turned on) and the seconds become visible on the watch face (red
rectangle moving). After two minutes, the device goes to idle mode: the number of colors is
reduced to save power and moving elements are turned o.

Deep sleep

Deep sleep is a function that prolongs battery life when Suunto D5 has not been used for
some time. Deep sleep is activated when one day has passed since:

•

No buttons have been pressed

•

Dive calculation has ended

Suunto D5 wakes up when it is connected to a PC/charger, when a button is pressed, or when
the water contact gets wet.

When not used, your Suunto D5 goes from active mode to idle mode and
sleep.

Wake up your Suunto D5 by pressing any button, or connecting to a computer / charger, or
activating the water contact by immersing the device in water.

finally to deep

33

Suunto D5

NOTE: If your Suunto D5 runs out of battery when in deep sleep, you can only wake up

your device by connecting to a charger or a computer with a USB cable of 5Vdc.

3.20. Language and unit system

You can change the device language and unit system at any time. Suunto D5 refreshes
immediately to

To set these values, see 4.3. How to set language and unit.

reflect the changes.

3.21. Logbook

Dive logs can be found under Logs. By default, they are listed by date and time, and each
entry listing shows the max. depth and dive time of the log.

Dive log details and profile can be browsed by scrolling through the log with upper or lower
button and selecting it with the middle button.

Each dive log contains data samples with fixed 10-second intervals. Freedive sample rate is 1
second.

For more detailed log analyses, upload the dive(s) to Suunto DM5 (see 3.27. Suunto DM5) and
the Suunto app (3.26. Suunto app).

In the image below you can see information on the:

•

start and stop times (14:36, 15:11)

•

depth

•

surface time (0:07)

•

max depth and temperature at max depth (33.0 m, 19 °C)

profile

As an example, the logbook info display gives you the following information on your logged
Nitrox dive:

34

Suunto D5

When the logbook memory gets full, the oldest dives are deleted to make space for new
ones.

NOTE: If you surface and then dive again within five minutes, Suunto D5 counts this as

one dive.

3.22. Oxygen calculations

During a dive, Suunto D5 calculates partial pressure of oxygen (pO2), central nervous system
toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units). The

oxygen calculations are based on currently accepted exposure time limit tables and
principles.

By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until they reach
80% of their recommended limits. When either value reaches 80%, Suunto D5
and the value stays in the view.

NOTE: You can customize views to always show CNS% and OTU. See 4.8. How to
customize dive modes with DM5. See also the Suunto Support for Q and A on DM5 at https://
www.suunto.com/Support/software-support/dm5/dm5-faq/

notifies you

35

Suunto D5

3.23. Personal adjustments

Suunto Fused™ RGBM 2 algorithms provide 5 personal setting options (+2, +1, 0, -1, -2). These
options refer to decompression models, which can be conservative (+2 and +1) or aggressive
(-2, -1, 0). Generally speaking, conservative means safer. In practice it means that a dive at a
given depth is shorter due to the decompression obligation (the no decompression time is
short).

Conservative also means that the time the diver needs to spend on decompression is longer.
For recreational divers, a conservative model means less time in the water in order to avoid
decompression requirements. For technical divers, however, conservative means more time in
the water because of the longer decompression requirements imposed during ascent.

Aggressive models, on the other hand, increase the potential health risks of a dive. For
recreational divers, an aggressive model allows more time at depth, but may significantly
increase the risk of decompression sickness (DCS).

The default setting for the Suunto Fused™ RGBM and Fused™ RGBM 2 is to use a compromise
(0 setting) between conservative and aggressive. With the personal setting, you can select
gradually more conservative or more aggressive calculations.

There are several risk factors that can

aect your susceptibility to DCS like your personal
health and behavior. Such risk factors vary between divers, as well as from one day to
another.

The personal risk factors which tend to increase the possibility of DCS include:

•

exposure to low temperature – water temperature less than 20 °C (68 °F)

•

below average physical

•

age, paricularly over the age of 50

•

fatigue (from over exercising, lack of sleep, exhaustive travel)

•

dehydration

•

stress

•

•

•

•

•

fitting equipment (may slow down o-gassing)

tight
obesity (BMI that is considered obese)
patent foramen ovale (PFO)
exercise before or after dive
strenuous activity during a dive (increases

(aects circulation and may slow down o-gassing)

fitness level

bloodflow and brings additional gas to tissues)

WARNING: SET THE CORRECT PERSONAL SETTING! Whenever it is believed that risk
factors that tend to increase the possibility of DCS exist, it is recommended that you use this
option to make the calculations more conservative. Failure to select the correct personal
setting will result in erroneous dive and planning data.

The five-step personal setting can be used to adjust the algorithm conservatism to fit your
DCS susceptibility. You can find the setting under Dive settings » Parameters » Personal.

Personal level

Explanation

More aggressive (-2) Ideal conditions, excellent physical fitness, highly

experienced with a lot of dives in the near past

Aggressive (-1) Ideal conditions, good physical fitness, well experienced

with dives in the near past

36

Suunto D5

Personal level Explanation

Default (0) Ideal conditions (default value)

Conservative (+1) Some risk factors or conditions exist

More conservative (+2) Several risk factors or conditions exist

WARNING: Personal adjustment setting 0, -1 or -2 causes a high risk of DCS, or other
personal injury, and death.

3.24. Safety stops and deep stops

Safety stops

A three (3) minute safety stop is always recommended for every dive over 10 meters (32.8 ft).

The time for a safety stop is calculated when you are between 2.4 and 6 m (7.9 and 19.7 ft).
This is presented with up/down arrows on the left side of the stop depth value. The safety
stop time is shown in minutes and seconds. The time may exceed three (3) minutes if you
ascend too fast during dive. Safety stops can be set to 3 (three), 4 (four), or 5 (five) minutes.

Deep stops

Deep stops activate only when you dive deeper than 20 m (65.6 ft). During ascend, deep
stops activate when you are halfway up from your maximum depth. Deep stops are presented
like safety stops. You are in the deep stop area when the deep stop depth has up/down
arrows in front of it and deep stop time is running. The deep stop window is +/- 1.5 m (4.9 ft).
Calculation starts at deep stop target depth plus 0.5 m (1.6 ft). Calculation ends - 3 m (- 9.8 ft)
away from deep stop depth.

There can be more than one deep stop during ascend. For example, if you dive to 42 m (137.8
ft), the
second deep stop is 2 minutes long.

In the following example the diver dives down to maximum 30.4 m (99.7 ft) and has a deep
stop at 15.2 m (49.8 ft):

first deep stop is prompted at 21 m (68.9 ft) and the second is at 10.5 m (34.4 ft) The

37

Suunto D5

Below 20.0 m (65.6 ft), deep stop gets activated. In this case, as the diver ascends, the deep
stop is necessary at halway of the maximum depth, so at 15.2 m (49.8 ft).

If the deep stop depth is 15.2 m (49.8 ft), the calculation starts at 15.7 m (51.5 ft) and stops at

12.2 m (40.0 ft). The deep stop window is +/- 1.5 m (4.9 ft) and when the diver is within the
deep stop window, it is indicated with two white arrows pointing at each other on the display.

When the diver ascends above the deep stop window ceiling - in this case above 14.2 m (46.5
ft) - a downward pointing yellow arrow signals that the depth is not optimal, it is
recommended to descend. The deep stop target depth number also turns yellow.

If the diver keeps ascending, after 0.5 m (1.6 ft), a downward pointing red arrow and an alarm
notifies the diver to descend immediately. The deep stop calculation keeps running for
another 1.5 m (4.9 ft) up but stops after that. In the above example it stops at 12.2 m (40.0 ft).

3.25. Sample rate

Suunto D5 uses a fixed sample rate of 10 seconds for all log recordings except in free mode.
Free mode uses a sample rate of 1 second.

3.26. Suunto app

With the Suunto app, you can easily transfer your dive logs to the app where you can follow
and share your diving adventures.

To pair with Suunto app on iOS:

1. Download and install Suunto app on your compatible Apple device from the iTunes App

Store. The app description includes the latest compatibility information.

2. Start Suunto app and turn on Bluetooth if it is not on already. Leave the app running in the

foreground.

3. If you have not yet set up your Suunto D5, do so now (see 2. Getting started).

38

Suunto D5

4. Tap the settings icon in the upper right and tap on the ' + ' icon to add a new device.

5. Tap on your dive computer from the list of found devices and enter the passkey shown on

the Suunto D5 display.

To pair with Suunto app on Android:

1. Download and install Suunto app on your compatible Android device from Google Play.

The app description includes the latest compatibility information.

2. Start Suunto app and turn on Bluetooth if it is not on already. Leave the app running in the

foreground.

3. If you have not yet set up your Suunto D5, do so now (see 2. Getting started).

4. A pop-up screen opens on your Android device. Select [Pair] .

5. Enter the passkey shown on your dive computer display into the paring request field on

your mobile device and tap [OK] .

3.27. Suunto DM5

The Suunto DM5 software program allows you to track and analyze all of your dive logs and
plan your future dives. With DM5 you can customize your Suunto D5 and update the device

firmware. Download Suunto DM5 from www.suunto.com/dm5.

NOTE: Mono framework is required when using DM5 on a Mac.

3.27.1. Synchronizing logs and settings

To be able to synchronize logs and settings, you need to
Suunto DM5).

To download logs from your Suunto D5 and sync settings:

1. Start DM5.

2. Connect Suunto D5 to a computer with a USB cable.

3. Wait for the syncing to complete.

New dive logs appear in the DM5 DIVES list on the left sorted by date and time.

3.27.2. Updating

Suunto DM5 is required to install new firmware for your Suunto D5. If a new firmware version
is available, you are notified when connection is established between your Suunto D5 and
DM5.

Before updating the
be unplugged until update process is completed.

Watch the video on YouTube.

To update firmware:

firmware

firmware, make sure the USB is securely connected. The cable must not

first install Suunto DM5 (see 3.27.

1. Select Suunto D5 from the devices list in DM5.

2. Synchronize if needed.

3. Click update and wait for the update process to complete. This may take up to 10 minutes.

39

Suunto D5

3.28. Surface and no-fly time

After a dive, Suunto D5 displays surface time since the previous dive and a countdown time
for recommended no-fly time. During the no-fly time, flying or traveling to higher altitude
should be avoided.

No-fly time is the minimum surface time after a dive which is recommended to wait before
entering and flying with an airplane. It is always at least 12 hours and equals desaturation time
when it is more than 12 hours. For desaturation times shorter than 75 minutes,
not displayed.

Once the no-fly time cacluated by your Suunto D5 with Suunto Fused™ RGBM 2 has ended,
you can enter and fly with a normal airplane which is pressurized up to 3000 m.

If decompression is omitted during a dive so that Suunto D5 enters permanent error mode
(see 3.2. Algorithm lock), the
mode (bottom timer), the no-fly time is 48 hours.

no-fly time is always 48 hours. Similarly, if dive is done in gauge

no-fly time is

WARNING: YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS
DOWN THE NO-FLY TIME. ALWAYS ACTIVATE THE COMPUTER TO CHECK THE REMAINING
NO-FLY TIME PRIOR TO FLYING! Flying or traveling to a higher altitude within the no-fly time
can greatly increase the risk of DCS. Review the recommendations given by Divers Alert
Network (DAN). There can never be a flying-after-diving rule that is guaranteed to completely
prevent decompression sickness!

3.29. Tank pressure

Your Suunto D5 can be used with the total number of three Suunto Tank PODs for wireless
tank pressure transmission.

To install and pair a Suunto Tank POD, see 4.6. How to install and pair a Suunto Tank POD

In tank pressure view you can see the below screens.

The following example has the tank pressure alarm set to 100 bars. The tank pressure is 75
bars as indicated in the switch window at the bottom, and also shown by the blue arrow in the
arch. When the tank pressure alarm is turned on, the arch is colored yellow between 50 bars
and the value you

defined (100 bars).

In the switch window, the actual tank pressure is shown in a blue field by default. This is also
shown with a blue arrow in the arch. The blue part of the arch indicates the range between
the value you set for the tank pressure alarm and the actual tank pressure:

40

Suunto D5

When the tank pressure alarm is turned on and the value is between the value you set and 50
bars, the tank pressure value is indicated in a yellow field in the switch window and the range
is also shown in the arch with yellow:

When the tank pressure drops below 50 bars (so within the red area in the arch) the actual
tank pressure value is indicated in a red
triggered:

field in the switch window and a mandatory alarm is

3.30. Timer

Suunto D5 has a timer that can be used for timing specific actions during surface or dive. The
timer is shown in bottom-right corner as scrollable item.

To use the timer:

1. While diving, press upper button to start the timer.

2. Press again the upper button to pause the timer.

3. Keep the upper button pressed to reset the timer.

Timer start and stop actions are saved to the dive log.

3.31. Water contacts

Suunto D5 has water contact functionality that recognizes when the device is in contact with
water. When submerged, the water contact poles are connected by the conductivity of the
water.

Suunto D5 switches to dive state when water is detected. Dive starts

•

when the water contact is on, at 1.2 m (4 ft), or

•

when the water contact is not on, at 3.0 m (9.8 ft)

and ends

•

when the water contact is on and your depth is less than 0.9 m (2.9 ft) in case of freedive,

and 1.2 m (3.9 ft) in case of scuba dive, or

•

when the water contact is not on and your depth is at 3.0 m (9.8 ft).

A wave icon appears on the left, above the ascend indicator when the device is under water.
See 2.2. Display - modes, views, and states for an overview of dive screen icons.

Water contact icon:

41

Suunto D5

Water contact icon in Free mode Depth view:

CAUTION: If you see a question mark in a yellow square appear, that means the device
is functioning abnormally. E.g. it can signal that the water contact is not working as expected.
Start using your backup instrument, abort the dive immediately and safely ascend to the
surface. Call Suunto Customer Support and return your computer to an authorized Suunto
Service Center for inspection.

42

Suunto D5

4. Use

4.1. How to access device info

To access Suunto D5 information:

1. Keep middle button pressed to enter the main menu.

2. Scroll to General with the upper or lower buttons and press the middle button.

3. Press the middle button to enter About D5.

4. Scroll to D5 info, press to enter.

5. Scroll with the lower button to see all information.

6. Keep middle button pressed to go back and exit from the menu.

4.2. How to change display brightness

To change brightness level:

1. Go to General » Device settings » Brightness.

2. Select from default, high, very high, low, or very low.

3. Turn the display brightness down or switch it

save battery life significantly.

o when there is ambient light available to

4.3. How to set language and unit

To change the device language and unit system:

1. Go to Main menu » General » Device settings » Language and select your language.

2. Go to Main menu » General » Device settings » Units & formats.

3. Select Date format, or Units, or Time format.

4. Use the upper or lower button to select from the available formats.

43

Suunto D5

NOTE: Under the unit settings, you have the option of selecting metric or Imperial as

a global setting: it will

5. To set the unit system for

could use metric for depth, and Imperial for tank pressure.

aect all measurements.

specific measurements select Advanced. For example, you

4.4. How to set time and date

To change time and date

1. Keep the middle button pressed to enter menu.

2. Browse to General » Device settings » Time & date.

3. Scroll to Set time or Set date with the upper or lower button.

4. Press the middle button to enter the setting.

5. Adjust the setting with the upper or lower button.

6. Press the middle button to move to the next setting.

7. Press again the middle button when last value is set to save and go back to Time & date

menu.

8. Keep middle button pressed to exit when done.

To change time and date formats

1. Keep the middle button pressed to enter menu.

2. Browse to General » Device settings » Units & formats.

3. Scroll to Time format or Date format with the upper or lower button.

4. Follow steps 5-8 as above to change and save formats.

4.5. How to set the alarm clock

Activate the alarm clock under Main menu » Alarm clock:

1. Use the upper or lower button to set the alarm on or

2. Change fields with the middle button and use the upper or lower buttons to set the hours

and minutes.

3. Press and hold the middle button to exit.

In the below example you set the alarm to 7:15 a.m.:

o.

NOTE: The alarm clock will be active every day until it is set to o.

44

Suunto D5

4.6. How to install and pair a Suunto Tank POD

To install and pair a Suunto Tank POD:

1. Install the Tank POD as described in the Tank POD quick guide or in Installing Type A air

restrictor and Installing Type B air restrictor in the Tank POD user guide .

2. After installing the Tank POD and opening the valve, wait for green LED on Tank POD to

flash.

3. If your Suunto D5 has a blank screen, press any key to activate it.

4. Use proximity pairing: Hold your Suunto D5 close to the Tank POD. Make sure you follow

the instructions in Tank POD alignment.

5. After a few seconds, a menu pops up on the screen showing the Tank POD serial number,

battery status and the tank pressure. From the menu, select the correct gas for that Tank

POD.

NOTE: The battery level indication shown when pairing the Tank POD is an

approximation only.

6. Repeat the procedure above for additional Tank PODs and select dierent gases for each

POD.

Alternatively you can pair the Suunto Tank POD(s) from the menu:

1. Select which Tank POD to use with each gas by selecting a Tank POD for the gas in

question in the Gases menu.

2. Make sure the Tank POD has been activated by ensuring there is tank pressure reading in

screen and that it is within range. In the menu, the Tank POD is

number printed on the Tank POD.

In the dive main views, only one tank pressure is shown and corresponds to the active gas.
When the gas is changed, the displayed tank pressure is also changed accordingly.

WARNING: If there are several divers using Tank PODs, always check before you dive
that the POD number of your selected gas corresponds to the serial number on your POD.

identified by the serial

45

Suunto D5

TIP: Remove pressure from the Tank POD when not diving to save battery life.

To unpair and remove your Tank POD from a

specific gas through the menu:

1. Select the gas you want to remove the Tank POD from in the Gases menu:

2. Select the Tank POD you want to remove (check the serial number):

3. Select Unpair:

4. Your Tank POD is removed from the selected gas list:

To unpair and remove your Tank POD from a specific gas using proximity:

1. Hold your Tank POD close to your dive computer in Tank pressure view:

2. Scroll to the gas you want to remove your Tank POD from:

46

Suunto D5

3. Select Unpair:

4. Your Tank POD is removed from the selected gas list:

4.7. How to plan a dive using the Dive planner

Before planning your
to your personal preference. Access the planner and adjust settings under Main menu » Dive
planner.

1. First set the values for:

•

personal gas consumption (default value: 25 L/min / 0.90 ft3)

•

tank pressure (default value: 200 bar / 3000 psi)

•

tank size (default value: 12 liters / 80 ft3, 3000 psi)

NOTE: It is important to adjust these values first to get the gas calcualtions right.

2. Use the lower or upper buttons to decrease or increase the values. If you are not sure

what your personal gas consumption is, we recommend using the default value of 25

L/min (0.90 ft3/min).

NOTE: Estimated gas time is calculated based on tank pressure at start minus 35

bar (510 psi).

In View planner you can see the calculated plan for your dive.

first dive, go through the planner settings and configure them according

The calculated no decompression time is based on dive depth and gas mixture. Any residual
nitrogen from previous dives, as well as surface time, is taken into consideration. Gas time is
dependent on the dive depth, personal consumption and tank size/pressure.

Planning the first dive in a series

1. Edit depth and mixture in View planner.

47

Suunto D5

2. As an example, enter 18 meters, use a mixture of 21% oxygen, and you will see the

following:

In this example, the calculated values are:

a. Dive number in the dive series: 1

b. Available no decompression time: 51 minutes

c. Remaining gas time: 41 minutes

Planning additonal dives

1. The dive planner allows you to adjust surface time in 10-minute increments. 48:00 hours is

the maximum value to be set.

In the example below, the surface time before the second dive is 1:37 minutes. Adjust

surface time to see how it impacts no decompression time.

4.8. How to customize dive modes with DM5

To customize Suunto D5:

1. Download and install Suunto DM5 from http://www.suunto.com/DM5.

2. Connect your Suunto D5 to a computer with a USB cable.

3. In the devices window, select Suunto D5.

4. Select the Customization tab. You can create new dive modes and modify existing ones.

NOTE: When creating or modifying dive modes, you need to synchronize the changes

with your Suunto D5 before disconnecting the USB cable to save the changes to your device.

Customization is divided into four categories:

•

Dive mode name

•

Dive algorithm

•

Gas settings

•

Customize views

To customize categories:

48

Suunto D5

Dive mode (name)

•

Use something short and simple that helps you identify easily the features and information

that you have customized on this mode.

•

Maximum length of the name is 15 characters.

Dive algorithm

•

Select to use Suunto Fused RGBM 2 or No algorithm (see 3.9. Decompression algorithm).

•

If you select No algorithm, Suunto D5 functions as a gauge (bottom timer) in that mode.

Further option to set is only:

•

Dive type

•

If you select Suunto Fused RGBM 2, you have additional options to set:

•

Dive type: OC (Open Circuit Diving) / Free /

•

Personal (algorithm conservatism - for more information see 3.23. Personal

O

adjustments)

•

Altitude (For more information see 3.23. Personal adjustments)

Gas settings

Configure what you see under the Gases menu in Suunto D5.

•

Turn the Multiple gases option on or

becomes active.

When turned

•

Set the Gas max pO2 to manual or

•

Set to fixed to have the selected value used for all gases. You cannot manually edit

o, the gas menu is simplified and easier to use with only one gas.

them in the Gases menu as it is disabled. You can select from:

•

Fixed to 1.2

•

Fixed to 1.3

•

Fixed to 1.4

•

Fixed to 1.5

•

Fixed to 1.6

•

Set to manual to edit the gas max pO2 for each gas individually in the Gases menu.

o. When on, the Modify gases while diving option

fixed:

Customize views

For Air / Nitrox, Gauge, and Free dive modes, you can create up to four custom views in
addition to the

NOTE: To customize the visual style of the mode is not possible for Suunto D5.

1. For each mode you have the fixed All day view in View 1 which is the watch or time view.

2. You have Default as View 2 that you can change to Tank pressure, Timer, or Compass.

3. Add further views in the Add new view

4. Modify, delete or add new customizable fields within each view of the mode. The

maximum number of switch windows (switchable fields) is 15 for each view. When editing

the view in DM5, you get a preview of how it will look on your Suunto D5.

fixed All day view. For O mode you can only have a single All day view.

field and select from the drop-down.

49

Suunto D5

5. When you added the desired view(s), click Done.

6. Synchronize your device to save the customizations to your Suunto D5.

7. When you use the view in Suunto D5, press the lower button to cycle through these switch

windows.

4.9. How to enable gas consumption metering

When you customize your Suunto D5 in DM5 to include the gas consumption info field in the
switch window (see 3.8. Customizing with Suunto DM5, this information will always be
avalable and visible during a dive where you use the gas to which the Tank POD is attached.

TIP: Make sure the tank size is correct.

To enable gas consumption metering:

1. Add the gas consumption field to your custom dive mode in DM5. See 3.8. Customizing

with Suunto DM5.

2. Install and pair a Suunto Tank POD. See 3.29. Tank pressure.

3. After you have selected the correct gas and returned to the main time view, keep the

middle button pressed to enter menu.

4. Scroll to Gases with the lower button and select with the middle button.

5. Scroll to the gas you just selected from your Tank POD and select with the middle button.

6. Scroll to Tank size and select with the middle button.

7. Check the tank size and change the size with the upper or lower button as needed.

Confirm change with the middle button.

8. Keep the middle button pressed to exit the menu.

NOTE: For accurate gas consumption, you must define the tank size. Not defining the

tank size leads to incorrect gas consumption readings.

4.10. How to set depth notifications (freedive only)

You can define a surface notification and five independent depth notifications for freediving,
for example, to alert you to start free falling or mouth filling. Each notification has a defined
depth and can be turned on or o.

In Free Mode go to Main menu » Dive settings » NOTIFICATIONS.

With the upper or lower button select Surface notify or Depth notify 1, 2, 3, 4, or 5.

The notifications are o by default. To define depth notifications:

1. Turn the notifications on with the upper button.

2. Use the middle button to switch among the fields horizontally to select the alarm type and

the depth of the

notification. You can select sound, vibration or both for the notification.

50

Suunto D5

3. Move to the rightmost field with the middle button to set the depth in meters.

Note: The depth

•

Depth notify 1 is set to 3.0 m

•

Depth notify 2 is set to 5.0 m

•

Depth notify 3 is set to 10.0 m

•

Depth notify 4 is set to 15.0 m

•

Depth notify 5 is set to 20.0 m showing you the max value of the depth gauge.

notifications can be set between 3 - 99 m. By default

When you reach the notification depth, the alarm you selected (sound, vibration or both) will
alert you.

4.11. How to add bookmarks

Keep the lower button pressed to add a bookmark (timestamp) to the active log for later
reference.

If you keep the lower button pressed while the compass view is active, both a timestamp and
the current compass heading are stored to the active log.

51

Suunto D5

5. Care and support

5.1. Handling guidelines

Handle Suunto D5 with care. The sensitive internal electronic components may be damaged if
the device is dropped or otherwise mishandled.

When travelling with this dive computer, ensure that it is packed securely in check-in or carry­on luggage. It should be placed in a bag or other container where it cannot move around
bumped or easily hit.

When

Do not try to open or repair Suunto D5 by yourself. If you are experiencing problems with the
device, please contact your nearest authorized Suunto Service Center.

device may seriously damage the unit. Only an authorized Suunto Service Center should do
service activities.

Wash and dry the dive computer after use. Rinse very carefully after any salt-water dive.

Pay special attention to the pressure sensor area, water contacts, pushers, and USB cable
port. If you use the USB cable before washing the dive computer, the cable (device end)
should be rinsed as well.

After use, rinse it with fresh water, mild soap, and carefully clean the housing with a moist soft
cloth or chamois.

on under water and consumes battery life.

Use only original Suunto accessories - damage caused by non-original accessories is not
covered by warranty.

computer. These can permanently damage the pressure sensor in your dive computer.

flying, turn your dive computer to airplane mode under General » Connectivity.

WARNING: ENSURE THE WATER RESISTANCE OF THE DEVICE! Moisture inside the

NOTE: Do not leave your Suunto D5 in a bucket of water (for rinsing). The display stays

WARNING: Do not use compressed air or high pressure water hoses to clean your dive

TIP: Remember to register your Suunto D5 at www.suunto.com/register to get
personalized support.

5.2. Installing scratch guard

Use the provided scratch guard to help protect your Suunto D5 from scratches.

To install the scratch guard:

1. Ensure the display glass is clean and dry.

2. Peel back the protective layer from one end of the scratch guard.

3. Place exposed adhesive side down squarely on one end of the display.

4. Pull back the protective layer from the scratch guard.

5. Press out any air bubbles with a soft, straight edge tool.

Watch the video on YouTube.

52

Suunto D5

5.3. Quick release strap

Suunto D5 has a quick release strap made of durable silicone. This quick release strap is
comfortable to wear and easy to change without any additional tools.

Slide the little pin button to the right, as shown below, to release the strap.

1.

2.

3.

5.4. Charging battery

Charge Suunto D5 with the supplied USB cable. For charging, use a USB port of 5Vdc, 0.5A
as a power source. If the battery is very low, the display remains dark while charging until the
battery has reached an adequate charge level.

NOTE: You cannot use buttons on your Suunto D5 when the USB cable is connected to
a computer. When charging from a wall outlet, or if your computer goes to sleep mode, the
buttons work again.

WARNING: You must only charge your device using USB adapters that comply with the
IEC 60950-1 standard for limited power supply. Non-compliant adapters are a fire hazard and
a risk to personal injury and might damage your Suunto device.

53

Suunto D5

CAUTION: DO NOT use the USB cable when Suunto D5 is wet. This may cause an
electrical failure. Ensure the cable connector and connector pin area on the device are both
dry.

CAUTION: DO NOT allow the connector pins of the USB cable to touch any conductive
surface. This may short circuit the cable, making it unusable.

Rechargeable batteries have a limited number of charge cycles and may eventually need to
be replaced. The battery should be replaced only by authorized Suunto Service Centers.

5.5. Getting support

To get additional support, visit www.suunto.com/support/suunto-d5/.

Our online support provides a comprehensive range of support materials, including the user
guide, frequently asked questions, how-to videos, service and repair options, our dive service
center locator, warranty terms and conditions as well as contact details for our customer
support.

If you could not find answers to you questions on our online support, please contact our
customer support. We are happy to assist you.

5.6. Disposal and recyling

Please dispose of the device in accordance with local laws and regulations for electronic
waste and batteries. Do not throw the device away with normal household garbage. If you
wish, you may return the device to your nearest Suunto dealer.

The symbol below indicates that within the European Union, this device must be disposed of
according to the directive for Waste Electrical & Electronic Equipment (WEEE). Please follow
the local practices of member states for the collection of electronic waste.

The proper collection and recycling of batteries and electronic devices helps conserve
resources and minimizes their impact on the environment.

54

Suunto D5

6. Reference

6.1. Technical specifications

Dimensions and weight:

•

Length: 53 mm / 2.08 in

•

Width: 53 mm / 2.08 in

•

Height: 16.5 mm / 10.65 in

•

Weight: 90 g / 3.17 oz

Operating conditions

•

Normal altitude range: 0 to 3,000 m / 10,000 ft above sea level

•

Operating temperature (diving): 0 °C to 40 °C / 32 °F to 104 °F

•

Operating temperature (non-diving): -20 °C to +50 °C (-4 °F to +122 °F)

•

Storage temperature: -20 °C to +50 °C / -4 °F to +122 °F

•

Recommended charging temperature: 0 °C to +35 °C / +32 °F to +95 °F

•

Maintenance cycle: 500 hours of diving or two years, whichever comes

first

NOTE: Do not leave the dive computer in direct sunlight!

Depth gauge

•

Temperature compensated pressure sensor

•

Accurate to 100 m / 328 ft complying with EN 13319 and ISO 6425

•

Depth display range: 0 to 300 m /0 to 984 ft

•

Resolution: 0.1 m from 0 to 100 m / 1 ft from 0 to 328 ft

Temperature display

•

Resolution: 1 °C / 1.5 °F

•

Display range: -20 to +50 °C/-4 to +122 °F

•

Accuracy: ± 2 °C/± 3.6 °F within 20 minutes of temperature change in temperature range

of 0 °C to 40 °C / 32 °F to 104 °F.

Displays in Air / Nitrox dive mode

•

Oxygen %: 21–99

•

Oxygen partial pressure display: 0.0–3.0 bar

•

CNS%: 0–500% with 1% resolution

•

OTU: 0-1000

Other displays

•

Dive time: 0 to 999 min

•

Surface time: 0 to 99 h 59 min

55

Suunto D5

•

Dive counter: 0 to 99 for repetitive dives

•

No-decompression time: 0 to 99 min (>99 above 99)

•

Ceiling depths: 3.0 to 200 m / 10 to 656 ft

•

Ascent time: 0 to 999 min (>999 after 999)

Calendar clock

•

Accuracy: ± 5 s/month (0 °C to 50 °C / 32 °F to 122 °F)

•

12/24 h display

Compass

•

Accuracy: +/- 15°

•

Resolution: 1°

•

Max. tilt: 45 degrees

•

Balance: global

Timer

•

Accuracy: 1 second

•

Display range: 0’00 – 99’59

•

Resolution: 1 second

Logbook

•

Sample rate. 10 seconds

•

Sample rate freedive: 1 second

•

Memory capacity: approximately 200 hours of diving or 400 dive logs, whichever comes

first

Tissue calculation model

•

Suunto Fused™ RGBM 2 algorithm (developed by Suunto and Bruce R. Wienke, BSc, MSc,

PhD)

•

15 tissue compartments

•

Tissue compartment halftimes for nitrogen: 1, 2, 5, 10, 20, 40, 80, 120, 160, 240, 320, 400,

480, 560 and 720 min. The on-gassing and o-gassing halftimes are the same.

•

Tissue compartment halftimes are divided by a constant factor to obtain helium halftimes.

•

Reduced gradient (variable) M-values based on diving habit and dive violations. The M-

values are tracked up to 100 hours after a dive

•

The exposure calculations (CNS% and OTU) are based on recommendations by R.W.

Hamilton, PhD and currently accepted exposure time limit tables and principles.

Battery

•

Type: rechargeable lithium-ion

•

Battery life:

fully charged: up to 6-12 h diving or 6 days in time mode

56

Suunto D5

The following conditions have an eect on the expected battery lifetime:

•

The conditions in which the unit is operated and stored (for example, temperature/cold

conditions). Below 10°C/50°F the expected battery lifetime is about 50- 75% of that at

20°C/68°F.

•

The quality of the battery. Some lithium batteries may exhaust unexpectedly, which cannot

be tested in advance.

NOTE: Rechargeable batteries have a limited number of charge cycles and may
eventually need to be replaced. The battery should be replaced only by authorized
Suunto Service Centers

NOTE: Low temperature may activate the battery warning even though the battery
has enough capacity for diving in water with higher temperatures (40 °C or less)

Radio transceiver

•

BluetoothⓇ Smart compatible

•

Frequency band: 2402-2480 MHz

•

Maximum output power: <4 dBm

•

Range: ~3 m/9.8 ft

Underwater radio receiver

•

Frequency band: single channel 123 kHz

•

Range: 1.4 m / 4.6 ft

Manufacturer

Suunto Oy

Tammiston kauppatie 7 A

FI-01510 Vantaa FINLAND

6.2. Compliance

6.2.1. EU radio directive

Hereby, Suunto Oy, declares that the radio equipment type DW182 is in compliance with
Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the
following internet address: www.suunto.com/EUconformity.

6.2.2. EU Personal Protective Equipment

The combination of Suunto D5 and Suunto Tank POD is a personal protective equipment
under the PPE Regulation (EU) 2016/425. The
Plongée Professionnelle, Entrée 3 - Port de la Pointe Rouge, 13008 MARSEILLE, France, has
completed the EC type-examination to the combination mentioned above and assured the
conformity with the European standard EN250:2014. The
50m as defined in the EN250:2014.

notified body no. 0078, Institut National de la

certification is up to the depth of

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Suunto D5

6.2.3. EU depth gauge standard

EN13319 is a European diving depth gauge standard. Suunto dive computers are designed to
comply with this standard.

6.2.4. FCC / ISED regulatory notices

Modification Statement

Suunto has not approved any changes or modifications to this device by the user. Any
changes or modifications could void the user’s authority to operate the equipment.

Interference Statement

This device complies with Part 15 of the FCC Rules and Industry Canada license-exempt RSS
standard(s). Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.

Wireless Notice

This device complies with FCC/ISED radiation exposure limits set forth for an uncontrolled
environment and meets the FCC radio frequency (RF) Exposure Guidelines and RSS‐102 of
the ISED radio frequency (RF) Exposure rules. This transmitter must not be co-located or
operating in conjunction with any other antenna or transmitter.

FCC Class B Digital Device Notice

This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by
turning the equipment
one or more of the following measures:

•

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment into an outlet on a circuit
is connected.

•

Consult the dealer or an experienced radio/TV technician for help.

o and on, the user is encouraged to try to correct the interference by

dierent from that to which the receiver

CAN ICES-3 (B) / NMB-3 (B)

This Class B digital apparatus complies with Canadian ICES-003.

6.3. Trademark

Suunto D5, its logos, and other Suunto brand trademarks and made names are registered or
unregistered trademarks of Suunto Oy. All rights are reserved.

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Suunto D5

6.4. Patent notice

This product is protected by pending patent applications and their corresponding national
rights: US 13/803,795, US 13/832,081, US 13/833,054, US 14/040,808, US 7,349,805, and US

86608266.

Additional patent applications may be filed.

6.5. International Limited Warranty

Suunto warrants that during the Warranty Period Suunto or a Suunto Authorized Service
Center (hereinafter Service Center) will, at its sole discretion, remedy defects in materials or
workmanship free of charge either by a) repairing, or b) replacing, or c) refunding, subject to
the terms and conditions of this International Limited Warranty. This International Limited
Warranty is valid and enforceable regardless of the country of purchase. The International
Limited Warranty does not aect your legal rights, granted under mandatory national law
applicable to the sale of consumer goods.

Warranty Period

The International Limited Warranty Period starts at the date of original retail purchase.

The Warranty Period is two (2) years for Products and Dive wireless transmitters unless
otherwise specified.

The Warranty Period is one (1) year for accessories including but not limited to wireless
sensors and transmitters, chargers, cables, rechargeable batteries, straps, bracelets and
hoses.

For all Suunto Spartan watches purchased in 2016 the Warranty Period has been extended to
three (3) years.

The Warranty Period is
(pressure) sensor on Suunto Dive Computers.

five (5) years for failures attributable to the depth measurement

Exclusions and Limitations

This International Limited Warranty does not cover:

1. a. normal wear and tear such as scratches, abrasions, or alteration of the color and/or
material of non-metallic straps, b) defects caused by rough handling, or c) defects or
damage resulting from use contrary to intended or recommended use, improper care,
negligence, and accidents such as dropping or crushing;

2. printed materials and packaging;

3. defects or alleged defects caused by use with any product, accessory, software and/or

service not manufactured or supplied by Suunto;

4. non-rechargeable batteries.

Suunto does not warrant that the operation of the Product or accessory will be uninterrupted
or error free, or that the Product or accessory will work with any hardware or software
provided by a third party.

This International Limited Warranty is not enforceable if the Product or accessory:

1. has been opened beyond intended use;

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Suunto D5

2. has been repaired using unauthorized spare parts; modified or repaired by unauthorized

Service Center;

3. serial number has been removed, altered or made illegible in any way, as determined at

the sole discretion of Suunto; or

4. has been exposed to chemicals including but not limited to sunscreen and mosquito

repellents.

Access to Suunto warranty service

You must provide proof of purchase to access Suunto warranty service. You must also register
your product online at www.suunto.com/register to receive international warranty services
globally. For instructions how to obtain warranty service, visit www.suunto.com/warranty,
contact your local authorized Suunto retailer, or call Suunto Contact Center.

Limitation of Liability

To the maximum extent permitted by applicable mandatory laws, this International Limited
Warranty is your sole and exclusive remedy and is in lieu of all other warranties, expressed or
implied. Suunto shall not be liable for special, incidental, punitive or consequential damages,
including but not limited to loss of anticipated
capital, cost of any substitute equipment or facilities, claims of third parties, damage to
property resulting from the purchase or use of the item or arising from breach of the warranty,
breach of contract, negligence, strict tort, or any legal or equitable theory, even if Suunto
knew of the likelihood of such damages. Suunto shall not be liable for delay in rendering
warranty service.

benefits, loss of data, loss of use, cost of

6.6. Copyright

Copyright © Suunto Oy. All rights reserved. Suunto, Suunto product names, their logos and
other Suunto brand trademarks and names are registered or unregistered trademarks of
Suunto Oy. This document and its contents are proprietary to Suunto Oy and are intended
solely for the use of clients to obtain knowledge and information regarding the operation of
Suunto products. Its contents shall not be used or distributed for any other purpose and/or
otherwise communicated, disclosed or reproduced without the prior written consent of
Suunto Oy. While we have taken great care to ensure that information contained in this
documentation is both comprehensive and accurate, no warranty of accuracy is expressed or
implied. This document content is subject to change at any time without notice. The latest
version of this documentation can be downloaded at www.suunto.com.

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Suunto D5

6.7. Menu

6.8. Dive Terms

Term

Altitude dive A dive made at an elevation greater than 300 m (1000

Ascent rate The speed at which the diver ascends toward the

Explanation

ft) above sea level.

surface.

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Suunto D5

Term Explanation

Ascent time The minimum amount of time needed to reach the

surface on a decompression stop dive.

Ceiling On a decompression stop dive, the shallowest depth to

which a diver may ascend based on computed inert gas
load.

CNS Central nervous system toxicity. Toxicity is caused by

oxygen. Can cause a variety of neurological symptoms.
The most important of which is an epileptic-like
convulsion which can cause a diver to drown.

CNS% Central nervous system toxicity limit fraction.

Compartment See Tissue group

DCS Decompression sickness/illness. Any of a variety of

maladies resulting either directly or indirectly from the
formation of nitrogen bubbles in tissues or body fluids,
as a result of inadequately controlled decompression.

Decompression Time spent at a decompression stop, or range, before

surfacing, to allow absorbed nitrogen to escape
naturally from tissues.

Decompression range On a decompression stop dive, the depth range

between the floor and the ceiling within which a diver
must stop for some time during ascent.

Dive series A group of repetitive dives between which the dive

computer indicates some nitrogen loading is present.
When nitrogen loading reaches zero the dive computer
deactivates.

Dive time Elapsed time between leaving the surface to descend,

and returning to the surface at the end of a dive.

Floor The deepest depth during a decompression stop dive at

which decompression takes place.

MOD Maximum operating depth of a breathing gas is the

depth at which the partial pressure of oxygen (pO2) of
the gas mix exceeds a safe limit.

Multi level dive A single or repetitive dive that includes time spent at

various depths and therefore has no decompression
limits that are not determined solely by the maximum
depth reached.

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Suunto D5

Term Explanation

Nitrox (Nx) In sports diving, refers to any mix with a higher fraction

of oxygen than standard air.

No deco No decompression stop time. The maximum amount of

time a diver may remain at a particular depth without
having to make decompression stops during the
subsequent ascent.

No decompression dive Any dive which permits a direct, uninterrupted ascent to

the surface at any time.

No dec time Abbreviation for no decompression time limit.

OTU Oxygen tolerance unit. Used to measure the whole-

body-toxicity, caused by prolonged exposure to high
oxygen partial pressures. The most common symptoms
are irritation in the lungs, a burning sensation in the
chest, coughing and reduction of the vital capacity.

O2% Oxygen percentage or oxygen fraction in the breathing

gas. Standard air has 21% oxygen.

pO

2

Partial pressure of oxygen. Limits the maximum depth to
which the nitrox mixture can be safely used. The
maximum partial pressure limit for enriched air diving is

1.4 bar. The contingency partial pressure limit is 1.6 bar.
Dives beyond this limit risk immediate oxygen toxicity.

Repetitive dive Any dive whose decompression time limits are aected

by residual nitrogen absorbed during previous dives.

Residual nitrogen The amount of excess nitrogen remaining in a diver

after one or more dives.

RGBM Reduced gradient bubble model. Modern algorithm for

tracking both dissolved and free gas in divers.

Scuba Self-contained underwater breathing apparatus.

Surface time Elapsed time between surfacing from a dive and

beginning a descent for the subsequent dive.

Tissue group Theoretical concept used to model bodily tissues for the

construction of decompression tables or calculations.

63

Suunto D5

64

SUUNTO CUSTOMER SUPPORT

1. www.suunto.com/support

www.suunto.com/register

2. AUSTRALIA (24/7) [phone]

AUSTRIA [phone]
BELGIUM [phone]
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Manufacturer:

Suunto Oy
Tammiston kauppatie 7 A,
FI-01510 Vantaa FINLAND

© Suunto Oy
Suunto is a registered trademark of Suunto Oy. All Rights reserved.