CUSTOMER SERVICE CONTACTS
Su u nt o O y
Phone +358 9 875870
F ax
Suunto USA
+ 3 5 8 9 8 7 5 8 73 0 1
Phone 1 (800) 543-9124
Canada
Phone 1 (800) 776-7770
Europe
Phone +358 2 284 11 60
Suunto website
www.suunto.com
1
1. WELCOME TO THE WORLD OF SUUNTO DIVING INSTRUMENTS ............ 7
2. WARNINGS, CAUTIONS, AND NOTES .............................................. 9
3. SUUNTO D6 AT A GLANCE .......................................................... 15
3.1. Navigating in the menus ......................................................... 16
3.2. Button symbols and functions ................................................... 17
4. GETTING STARTED WITH YOUR SUUNTO D6 .................................. 19
4.1. TIME mode settings .............................................................. 19
4.1.1. Setting the alarm ............................................................ 20
4.1.2. Setting the time .............................................................. 21
4.1.3. Setting the dual time ........................................................ 21
4.1.4. Setting the date .............................................................. 22
4.1.5. Setting the units ............................................................. 22
4.1.6. Setting the backlight ........................................................ 23
4.1.7. Setting the tones ............................................................ 23
4.2. Stopwatch ......................................................................... 24
4.3. AC water contacts ................................................................ 25
4.4. Learning how to use your compass ............................................ 26
4.4.1. Compass display ............................................................ 27
4.4.2. Locking a bearing ........................................................... 28
4.4.3. Compass settings ........................................................... 29
5. BEFORE DIVING ...................................................................... 32
5.1. The Suunto RGBM/Deep Stop Algorithm ...................................... 33
5.2. Emergency ascents .............................................................. 33
5.3. Dive computer limitations ........................................................ 34
3
5.4. Nitrox ...............................................................................
5.5. Freediving .........................................................................
5.6. Audible and visual alarms .......................................................
5.7. Error conditions ...................................................................
5.8. DIVE mode settings ..............................................................
5.8.1. Setting the depth alarm .....................................................
5.8.2. Setting the dive-time alarm .................................................
5.8.3. Setting the nitrox values ....................................................
5.8.4. Setting the personal/altitude adjustments ................................
5.8.5. Setting the sample rate .....................................................
5.8.6. Setting the Safety Stops/Deep Stops .....................................
5.8.7. Setting the RGBM values ..................................................
5.9. Activation and pre-checks .......................................................
5.9.1. Accessing DIVE mode ......................................................
5.9.2. DIVE mode activation .......................................................
5.9.3. Battery power indication ....................................................
5.9.4. Diving at altitude .............................................................
5.9.5. Personal adjustments .......................................................
5.10. Safety Stops .....................................................................
5.10.1. Recommended Safety Stops .............................................
5.10.2. Mandatory Safety Stops ..................................................
5.11. Deep stops .......................................................................
6. DIVING ..................................................................................
6.1. Diving in AIR mode (DIVEair) ...................................................
4
34
34
35
39
40
41
42
42
44
44
45
45
46
46
46
48
49
50
52
52
53
55
56
56
6.1.1. Basic dive data ..............................................................
6.1.2. Bookmark ....................................................................
6.1.3. Ascent rate indicator ........................................................
6.1.4. Safety Stops and Deep Stops .............................................
6.1.5. Decompression dives .......................................................
6.2. Diving in NITROX mode (DIVEean) ...........................................
6.2.1. Before diving in NITROX mode ............................................
6.2.2. Oxygen displays .............................................................
6.2.3. Oxygen limit fraction (OLF) ................................................
6.2.4. Gas change and multiple breathing gas mixes ..........................
6.3. Diving in GAUGE mode (DIVEgauge) .........................................
7. AFTER DIVING .........................................................................
7.1. At the surface .....................................................................
7.1.1. Surface interval ..............................................................
7.1.2. Dive numbering ..............................................................
7.1.3. Repetitive dive planning ....................................................
7.1.4. Flying after diving ...........................................................
7.1.5. MEMORY mode ............................................................
7.1.6. Suunto Dive Manager (SDM) ..............................................
7.1.7. SuuntoSports.com ..........................................................
8. CARE AND MAINTENANCE .........................................................
8.1. Water contacts and buttons .....................................................
8.2. Care of your dive computer ......................................................
8.3. Maintenance ......................................................................
56
58
59
60
60
65
66
67
69
69
70
72
72
72
73
74
74
75
80
81
83
83
83
84
5
8.4. Water resistance inspection ..................................................... 85
8.5. Battery replacement .............................................................. 86
9. TECHNICAL DATA ..................................................................... 87
9.1. Technical specifications .......................................................... 87
9.2. RGBM .............................................................................. 90
9.2.1. Suunto RGBM adaptive decompression ................................. 91
9.2.2. No-decompression limits ................................................... 92
9.2.3. Altitude diving ................................................................ 94
9.3. Oxygen exposure ................................................................ 95
10. INTELLECTUAL PROPERTY ....................................................... 96
10.1. Copyright ......................................................................... 96
10.2. Trademark ....................................................................... 96
10.3. Patent notice ..................................................................... 96
11. DISCLAIMERS ........................................................................ 97
11.1. User’s responsibility ............................................................ 97
11.2. Limits of liability and ISO 9001 compliance .................................. 97
11.3. After sales service ............................................................... 98
12. WARRANTY ........................................................................... 99
13. DISPOSAL OF THE DEVICE ...................................................... 101
GLOSSARY .............................................................................. 102
6
1. WELCOME TO THE WORLD OF SUUNTO DIVING
INSTRUMENTS
Suunto D6 was designed to help you get the most out of your diving. After reading
this manual and becoming familiar with the functions of your dive computer, you'll be
ready to take the plunge into a whole new world of diving.
7
With integrated digital compass and gas switching, Suunto D6 simplifies your diving
experience because all the information you need relating to depth, time, decompression
status, and direction is available on one easy-to-read screen – not hanging off you in
a tangle of different gauges.
To get the most out of your Suunto D6, please read this instruction manual carefully
and make sure you understand the use, displays, and limitations of the instrument
before using it. To make life easier, we've included a glossary of dive-specific
terminology at the back of the manual.
8
2. WARNINGS, CAUTIONS, AND NOTES
Throughout this manual, important safety icons are displayed. Three classifications
are used to separate these icons by their order of importance:
WARNING
is used in connection with a procedure or situation that could
result in serious injury or death
CAUTION
is used in connection with a procedure or situation that could
result in damage to the device
NOTE
is used to emphasize important information
Before you go on to read the manual itself, it is extremely important that you read the
following warnings. These warnings are intended to maximize your safety while using
Suunto D6 and must not be ignored.
WARNING
READ THIS MANUAL! Carefully read this manual in its entirety,
paying close attention to all the warnings listed below, including
Section 5. BEFORE DIVING. Make sure that you fully understand
the use, displays and limitations of the dive computer, because
any confusion resulting from neglecting to follow this user's manual
or from improper use of this device could cause you to commit
errors that may lead to serious injury or death.
9
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 illness
(DCI). Therefore, Suunto strongly recommends that the device
is not used for any commercial or professional diving activities.
WARNING
ONLY DIVERS TRAINED IN THE PROPER USE OF SCUBA
DIVING EQUIPMENT SHOULD USE A DIVE COMPUTER! No
dive computer can replace the need for proper dive training.
Insufficient or improper training may cause you to commit errors
that may lead to serious injury or death.
WARNING
THERE IS ALWAYS A RISK OF DECOMPRESSION ILLNESS
(DCI) 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 CAN PREVENT THE POSSIBILITY OF DCI OR OXYGEN
TOXICITY! An individual’s physiological make-up 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 DCI. As an
added precaution, you should consult a physician regarding your
fitness before diving.
10
WARNING
SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS
LIMIT THEIR MAXIMUM DEPTH TO 40 M/130 FT OR TO THE
DEPTH CALCULATED BY THE COMPUTER BASED ON THE
SELECTED O2% AND A MAXIMUM PO2 OF 1.4 BAR!
WARNING
DIVES THAT REQUIRE DECOMPRESSION STOPS ARE NOT
RECOMMENDED. YOU SHOULD ASCEND AND BEGIN
DECOMPRESSION IMMEDIATELY WHEN THE DIVE
COMPUTER SHOWS YOU THAT A DECOMPRESSION STOP
IS REQUIRED! Note the blinking ASC TIME symbol and the
upward pointing arrow.
WARNING
USE BACK-UP INSTRUMENTS! Make sure that you use backup instrumentation, including a depth gauge, submersible pressure
gauge, timer or watch, and have access to decompression tables
whenever diving with the dive computer.
WARNING
PERFORM PRE-CHECKS! Always activate and check the device
before diving in order to ensure that all Liquid Crystal Display
(LCD) segments are completely displayed, that the device has
not run out of battery power, and that the oxygen, altitude,
personal, Safety/Deep Stop, and RGBM adjustments are correct.
11
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 NOFLY TIME PRIOR TO FLYING! Flying or traveling to a higher
altitude within the no-fly time can greatly increase the risk of DCI.
Review the recommendations given by Diver’s Alert Network
(DAN) in Section 7.1.4. Flying after diving.
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 DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU
HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND
ENTERED THE ANALYZED VALUE INTO YOUR DIVE
COMPUTER! Failure to verify cylinder contents and enter the
appropriate O2% into your dive computer will result in incorrect
dive planning information.
12
WARNING
THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL
PERCENTAGE VALUES OF OXYGEN CONCENTRATION. DO
NOT ROUND UP FRACTIONAL PERCENTAGES! For example,
31.8% oxygen should be entered as 31%. Rounding up will cause
nitrogen percentages to be understated and will affect
decompression calculations. If you want to adjust the computer
to provide more conservative calculations, use the personal
adjustment feature to affect decompression calculations, or reduce
the PO2 setting to affect oxygen exposure.
WARNING
SELECT THE CORRECT ALTITUDE ADJUSTMENT SETTING!
When diving at altitudes greater than 300 m/1,000 ft the Altitude
Adjustment feature 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 3,000
m/10,000 ft. Failure to select the correct Altitude Adjustment
setting, or diving above the maximum altitude limit will result in
erroneous dive and planning data.
WARNING
SELECT THE CORRECT PERSONAL ADJUSTMENT SETTING!
Whenever it is believed that factors that tend to increase the
possibility of DCI exist, it is recommended that you use this option
to make the calculations more conservative. Failure to select the
correct Personal Adjustment setting will result in erroneous dive
and planning data.
13
WARNING
This device contains a Lithium cell battery. To reduce the risk of
fire or burns, do not disassemble, crush, puncture, short external
contacts, or dispose of in fire or water. Replace only with
manufacturer-specified batteries. Recycle or dispose of used
batteries properly.
NOTE
It is not possible to change between AIR, NITROX and GAUGE
modes before the instrument has counted down the no-fly time.
There is one exception to this: You can change from AIR to
NITROX mode even during the no-fly time. When planning both
air and nitrox dives during the same dive series, you should set
the instrument in NITROX mode and modify the gas mix
accordingly.
In GAUGE mode, the no-fly time is always 48 hours.
14
3. SUUNTO D6 AT A GLANCE
Present Depth
Active Water Contact
Indicator
Daily Alarm Indicator
Dive Alarm Indicator
Diver Attention Symbol
No-Fly Icon
Safety Stop Indicator
Current Time Display
Mode Indicator
No-Decompression Time
Total Ascent Time
Ceiling Depth
Safety/Deep Stop Time
Surface Interval Time
No-Fly Time
Compass Display
Date
Dual Time
Maximum Depth
PO2 (Nitrox Mode)
Time
Ascent Rate Bar Graph
Seconds Display
Stopwatch
Weekday
Dive Time
Temperature
PO2 (Nitrox Mode)
OLF% (Nitrox Mode)
Low Battery Warning
NOTE
If no button is pressed for 5 minutes, the dive computer beeps
and returns to the TIME mode automatically.
15
3.1. Navigating in the menus
Suunto D6 has three main operating modes - TIME mode (TIME), DIVE mode (DIVE),
and MEMORY mode (MEM) – as well as the COMPASS submode, which can be
activated from either TIME or DIVE modes. To toggle between the main modes, press
the MODE button. To select a submode in DIVE and MEM mode, press the UP/DOWN
buttons.
16
3.2. Button symbols and functions
The table below explains the main functions of the dive computer's buttons. The buttons
and their use will be explained in more detail in the relevant sections of the manual.
Table 3.1. Button symbols and functions
Symbol
Button Press Main functions
MODE
Short
Switch between main modes
Switch from submode to main mode
Activate backlight in DIVE mode
MODE
Long
Activate backlight in other modes
SELECT Short
Select a submode
Select and accept settings
SELECT Long
Activate compass in TIME and DIVE modes
17
Symbol
18
Button
Press
Main functions
UP
Short
Toggle between alternative displays
Change submode
Increase values
UP
Long
Enable gas switching in NITROX mode
DOWN
Short
Toggle between alternative displays
Change submode
Decrease values
DOWN
Long
Enter Setting mode
4. GETTING STARTED WITH YOUR SUUNTO D6
To get the most out of your Suunto D6, take some time to personalize it and really
make it YOUR computer. Set the correct time and date, as well as the alarms and
tones, unit and backlight settings, then calibrate and test the compass function.
Suunto D6 is a very user-friendly dive computer, and you will quickly become familiar
with its functions. Make absolutely sure that you know your computer and have it set
up as you want it BEFORE getting into the water.
4.1. TIME mode settings
The first thing you'll want to do with your Suunto D6, is to set the TIME mode shortcuts:
alarm, time, dual time, date, units, backlight, and tones. In this section, we look at how
to do this.
Before that, however, take a look at the figure below, which shows how to toggle
between different shortcuts in the TIME mode.
NOTE
The seconds display reverts to date display after 5 minutes in
order to save battery power.
19
NOTE
The display is illuminated by holding down the MODE button for
more than 2 seconds.
Now that you know how to toggle between the shortcuts, you can start to set them.
The following figure shows how to enter the TIME SETTINGS menu.
53%50!.$$/7."544/.3
4/4/'',%"%47%%.!,!2-4)-%
$5!,4)-%$!4%5.)43"!#+,)'(4
!.$4/.%3
4.1.1. Setting the alarm
The dive computer has a daily alarm function. When the daily alarm activates, the
screen blinks and the alarm sounds for 24 seconds. Press any button to stop the
alarm.
20
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.2. Setting the time
In the TIME SETTING mode, you are able to set the hour, minute, and second, as
well as choose between 12 and 24 hour display.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.3. Setting the dual time
In the DUAL TIME SETTING mode you can select the hour and minute of a dual time
- useful when traveling to a different time zone.
21
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.4. Setting the date
Use the DATE SETTING mode to set the year, month, and day. The day of the week
is automatically calculated in accordance with the date.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.5. Setting the units
In the UNITS SETTING mode you can choose to have the units displayed in either
the metric or imperial system - meters/feet, Celsius/Fahrenheit etc.
22
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.6. Setting the backlight
Use the BACKLIGHT SETTING mode to turn the backlight on or off and to define how
long it stays on for (5, 10, 20, 30, or 60 seconds). When the backlight is turned off, it
does not illuminate when an alarm sounds.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.1.7. Setting the tones
The TONE SETTING mode allows you to activate or deactivate the tones.
23
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
4.2. Stopwatch
The Suunto D6’s stopwatch measures elapsed and split times. A separate stopwatch
(dive timer) can also be used when in GAUGE mode. See Section 6.3. Diving in
GAUGE mode (DIVEgauge) .
53%$/7."544/.4/34!24
34/07!4#(!.$4!+%!30,)44)-%
4(%50"544/.34/034(%34/07!4#(
!.$,/.'02%33).')42%3%43)4
24
4.3. AC water contacts
The water and data transfer contact is located on the right side of the case. When
submerged, the water contact is connected to the casing (which is the other pole of
the water contact) by the conductivity of the water and the “AC” symbol appears on
the display. The AC text is shown until the water contact deactivates.
!#!00%!23).4(%4/02)'(4
#/2.%2/&4(%$)30,!97(%.4(%$)6%
#/-054%2)3).#/.4!#47)4(7!4%2
4()3!,3/!#4)6!4%34(%$)6%-/$%
Contamination or dirt on the water contact may prevent this automatic activation. It is
therefore important that the water contact is kept clean. The contact can be cleaned
with fresh water and a soft brush, for example a tooth brush.
25
NOTE
Water or moisture build-up around the water contact may cause
the contact to activate automatically. This can happen, for
example, when washing your hands or sweating. If the water
contact activates in the TIME mode, the AC symbol will appear
on the display, and will be shown until the water contact
deactivates. To save battery power, you should deactivate the
water contact by cleaning it and/or drying it with a soft towel.
4.4. Learning how to use your compass
Suunto D6 integrates a digital compass, which can be used both while diving and on
dry land, and can be accessed from either the DIVE mode or TIME mode.
26
)&!##%33%$&2/-4)-%-/$%
4)-%!.$"%!2).'!2%$)30,!9%$!4
4(%"/44/-/&4(%3#2%%.
)&!##%33%$&2/-$)6%-/$%
#522%.4$%04(!.$4)-%/2
-!8)-5-$%04(!37%,,!3
"%!2).'/2$)6%4)-%/2
4%-0%2!452%!2%$)30,!9%$
NOTE
When accessed from DIVE mode, toggle between the alternative
displays by pressing the UP/DOWN buttons.
NOTE
In order to save battery power, the compass display will
automatically return to the TIME or DIVE mode 60 seconds after
the last button-press.
4.4.1. Compass display
The Suunto D6 displays the compass as a graphical representation of a compass
rose. The rose displays the cardinal and half cardinal points, in addition to which, the
current bearing is also displayed numerically.
27
4.4.2. Locking a bearing
A bearing can be locked to help you follow a selected course, and directional arrows
point towards the locked bearing. Locked bearings are stored in the memory for later
analysis and are available the next time the compass is activated.
4/,/#+!"%!2).'
02%333%,%#4
The Suunto D6 also provides help for navigating square and triangular patterns, as
well as navigating a return heading. This is made possible by following graphical
symbols in the center of the compass display:
Table 4.1. Locked bearing symbols
Symbol
Explanation
You are traveling towards the locked bearing
You are 90 (or 270) degrees from the locked bearing
You are 180 degrees from the locked bearing
28
Symbol
Explanation
You are 120 (or 240) degrees from the locked bearing
4.4.3. Compass settings
You can define the compass settings (declination and calibration) when in COMPASS
mode:
Declination
You can compensate for the difference between true north and magnetic north by
adjusting the compass declination. The declination can be found, for example, from
sea charts or topographic maps of the local area.
29
!$*5347)4(50
!.$$/7.!##%04
7)4(3%,%#4
Calibration
Because of changes in the surrounding magnetic field, the Suunto D6 electronic
compass occasionally needs to be re-calibrated. During the calibration process, the
compass adjusts itself to the surrounding magnetic field. As a basic rule, you should
calibrate the compass whenever it doesn’t seem to operate properly, or after replacing
the dive computer's battery.
Strong electromagnetic fields, such as powerlines, stereo speakers, and magnets can
affect the compass calibration. It is therefore advisable to calibrate the compass if
your Suunto D6 has been exposed to these fields.
NOTE
When traveling overseas, it is recommended that you recalibrate
the compass at the new location before using it.
NOTE
Remember to hold the Suunto D6 level during the calibration
process.
To calibrate the compass:
30
(/,$4(%
$%6)#%,%6%,
!.$3,/7,9
2/4!4%²
If the calibration fails several times in a row, it is possible that you are in an area with
sources of magnetism, such as large metal objects, powerlines or electric appliances.
Move to another location and try to calibrate the compass again. If the calibration
continues to fail, contact an authorized Suunto service center.
31
5. BEFORE DIVING
Do not attempt to use the dive computer without reading this user's manual in its
entirety, including all the warnings. Make sure that you fully understand the use,
displays, and limitations of the instrument. If you have any questions about the manual
or the Suunto D6, please contact your Suunto representative before diving with the
dive computer.
Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
When used properly, Suunto D6 is an outstanding tool for assisting properly trained,
certified divers in planning and executing sport dives. It is NOT A SUBSTITUTE FOR
CERTIFIED SCUBA INSTRUCTION, including training in the principles of
decompression.
WARNING
Diving with enriched air mixtures (nitrox) exposes you to risks
that are different from those associated with diving with standard
air. These risks are not obvious, and require training to understand
and avoid. Risks include possible serious injury or death.
Do not attempt to dive with any gas mix other than standard air without first receiving
certified training in this specialty.
32
5.1. The Suunto RGBM/Deep Stop Algorithm
Suunto’s Reduced Gradient Bubble Model (RGBM), utilized in the Suunto D6, predicts
both dissolved and free gas in the blood and tissues of divers. It is a significant advance
on the classic Haldane models, which do not predict free gas. The advantage of Suunto
RGBM is additional safety through its ability to adapt to a variety of situations and dive
profiles.
The Suunto D6 allows you to choose between a traditional Recommended Safety
Stop and Deep Stops. Deep Stops are safety stops that occur deeper than traditional
stops, with the purpose of minimizing microbubble formation.
In order to optimize the response to different increased risk situations, an additional
category of stop, referred to as a Mandatory Safety Stop, has been introduced. The
combination of stop types depends on the user settings and the specific dive situation.
To get the most from the RGBM safety benefits, refer to Section 9.2. RGBM.
5.2. 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 or, alternatively,
follow these steps:
1. Assess the situation calmly and then move promptly to less than 18 m/60 ft.
2. At 18 m/60 ft, slow down your ascent rate to 10 m/33 ft per minute and move to
a depth between 3 and 6 m/10 and 20 ft.
3. Stay there for as long as your air supply will safely allow. After reaching the
surface, do not dive for at least 24 hours.
33
5.3. Dive computer limitations
While the dive computer's calculations are based on current decompression research
and technology, it is important to realize that the computer cannot monitor the actual
physiological functions of an individual diver. All decompression schedules currently
known to the authors, including the U.S. Navy Tables, are based on theoretical
mathematical models, which are intended to serve as a guide to reduce the probability
of decompression illness.
5.4. Nitrox
Diving with nitrox provides you with an opportunity to increase bottom times or reduce
the risk of decompression illness by reducing the nitrogen content in the gas mix.
However, when the gas mix is altered, the oxygen content of the mix is generally
increased. This increase exposes the diver to an oxygen toxicity risk not usually
considered in recreational diving. In order to manage this risk, the dive computer tracks
the time and intensity of the oxygen exposure and provides the diver with information
to adjust the dive plan in order to maintain oxygen exposure within reasonably safe
limits.
In addition to the physiological effects of enriched air on the body, there are operational
considerations to be addressed when handling altered breathing mixes. Elevated
concentrations of oxygen present a fire or explosion hazard. Consult the manufacturer
of your equipment to check its compatibility with nitrox.
5.5. Freediving
Freediving, and particularly freediving in combination with scuba diving, may present
risks that have not been researched and are not commonly known.
34
Anyone who engages in any form of breathhold diving is in danger of shallow-water
blackout (SWB), that is, the sudden loss of consciousness caused by oxygen starvation.
Any breathhold diving results in some nitrogen build-up in the blood and other fast
tissues. Due to the short time spent at depth, this build-up is generally not significant.
Therefore, provided the effort involved in freediving has not been severe, there is little
risk in diving after breathhold diving. However, the reverse is more unknown and may
significantly increase the risk of DCI. Therefore, FREEDIVING AFTER SCUBA DIVING
IS NOT RECOMMENDED. You should avoid freediving, and not exceed 5 m/16 ft, for
at least two hours after scuba diving.
WARNING
Suunto also recommends that you receive training in freediving
techniques and physiology before conducting breathhold dives.
No dive computer can replace the need for proper dive training.
Insufficient or improper training may cause a diver to commit
errors that may lead to serious injury or death.
5.6. Audible and visual alarms
The dive computer features audible and visual alarms that advise when important
limits are approached or that prompt you to acknowledge preset alarms. The table
below describes the different alarms and their meanings.
35
Table 5.1. Audible and visual alarm types
Alarm type
Short single beep
Alarm reason
Dive computer is activated.
Dive computer automatically returns to the TIME mode.
Three beeps with a three
No-decompression dive turns into a Decompression
second interval and activated Stop dive. An arrow pointing upwards and the blinking
backlight
ascent warning ASC TIME will appear.
Continuous beeps and
activated backlight
Maximum allowed ascent rate, 10 m per min/33 ft per
min, is exceeded. Ascent rate bar graph blinks and
STOP warning appears.
Decompression ceiling depth is exceeded. An Error
warning (Er) and a downward pointing arrow appear.
You should immediately descend to, or below, the
ceiling. The instrument will otherwise enter a
permenant Error mode within three minutes, indicated
by a permanent Er symbol.
You are able to preset alarms before the dive. The programmable alarms can be set
for maximum depth, dive time and time. See also Section 5.8. DIVE mode settings
and Section 4.1. TIME mode settings.
36
Table 5.2. Preset alarm types
Alarm type
Alarm reason
Continuous beep series for 24 seconds
Maximum depth blinks as long as the current depth
value exceeds the preset value.
Preset maximum depth is
reached.
Continuous beep series for 24 seconds or until any
button is pressed.
Dive time blinks for one minute.
Preset dive time is reached.
Current time is shown
Continuous beep series for 24 seconds or until any
button is pressed.
Current time blinks for one minute
Preset alarm time is reached.
37
Table 5.3. Oxygen alarms in NITROX mode
Alarm type
Continuous beeps for 3
minutes and activated
backlight
Alarm reason
Set oxygen partial pressure limit is exceeded. The
alternative display is replaced with a current blinking
PO2 value. You should immediately ascend above the
PO2 depth limit.
OLF value reaches 80%. The OLF value will start to
blink.
OLF value reaches 100%. The OLF value will blink.
NOTE
When the backlight is turned OFF, it does not illuminate when an
alarm is activated.
WARNING
WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE
MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY
ASCEND UNTIL THE OLF VALUE STOPS BLINKING. Failure
to take action to reduce oxygen exposure after the warning is
given can rapidly increase the risk of oxygen toxicity, injury, or
death.
38
5.7. Error conditions
The dive computer has warning indicators that alert you to react to certain situations
that would significantly increase the risk of DCI. If you do not respond to its warnings,
the dive computer will enter an Error mode, indicating that the risk of DCI has greatly
increased. If you understand the dive computer and operate it sensibly, it is very
unlikely you will ever put the instrument into the Error mode.
Omitted decompression
The Error mode results from omitted decompression, i.e. when you stay above the
ceiling for more than three minutes. During this three-minute period the Er warning is
shown and the audible alarm beeps. After this, the dive computer will enter a permanent
Error mode. The instrument will continue to function normally if you descend below
the ceiling within this three-minute period.
Once in the permanent Error mode, only the Er warning is shown in the center window.
The dive computer will not show times for ascent or stops. However, all the other
displays will function as before to provide information for ascent. You should
immediately ascend to a depth of 3 to 6 m/10 to 20 ft and remain at this depth until
air supply limitations require you to surface.
After surfacing, you should not dive for a minimum of 48 hours. During the permanent
Error mode, the Er text will be displayed in the center window and the planning mode
will be disabled.
39
5.8. DIVE mode settings
Suunto D6 has several user-definable functions, as well as depth and time-related
alarms that you can set according to your personal preferences. The DIVE mode
settings are dependent on the dive sub-mode chosen (AIR, EAN, GAUGE), so that,
for example, nitrox settings are only available in the DIVEean sub-mode. The table
below shows what dive settings are available in each DIVE submode.
Table 5.4. DIVE mode settings
Setting
AIR mode NITROX mode GAUGE mode
Depth alarm
X
X
X
Dive-time alarm
X
X
X
Nitrox
X
Personal/Altitude
X
X
Sample rate
X
X
Safety/Deep stop
X
X
RGBM
X
X
Units
X
X
X
X
The following figure shows how to enter the DIVE mode settings menu.
40
53%50!.$
$/7."544/.34/
4/'',%"%47%%.
$)6%3%44).'3
NOTE
The settings cannot be activated until 5 minutes has elapsed after
the dive.
5.8.1. Setting the depth alarm
You can set a depth alarm in the dive computer.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
41
The depth alarm is factory-set to 40 m/131 ft, but you can adjust it according to your
personal preference, or switch it off altogether. The depth range can be set from 3m
to 100 m/9 ft to 328 ft.
5.8.2. Setting the dive-time alarm
The Suunto D6 has a dive-time alarm setting which, when activated, can be used for
several purposes to add to your diving safety.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
NOTE
With a range of 1 - 99 minutes, the alarm can be set to your
planned bottom time, for example.
5.8.3. Setting the nitrox values
If set to the NITROX mode, the correct oxygen percentage of the gas in your cylinder
(and additional gases) must always be entered into the computer to ensure correct
nitrogen and oxygen calculations. In addition, the oxygen partial pressure limit must
be set. When in the Nitrox setting mode, the equivalent allowed maximum depth,
based on the chosen setting, will also be displayed. Settings for an additional mix
(MIX2) are made similarly, but with the additional selection of “ON” or “OFF”.
42
In order to minimize the risk of error during a dive, it is highly recommended that the
mixes are set in the proper order. This means that as the mix number rises, so does
oxygen content, and this is the order they are usually used during the dive. Before a
dive, only set to “ON” the mixes you actually have available and remember to check
the set values to make sure they are correct.
The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial pressure
(PO2) setting 1.4 bar. After entering values for MIX1, you can enable/disable and set
an additional gas mix - MIX2.
!$*5347)4(
50!.$$/7.
"544/.3!##%04
7)4(3%,%#4
"544/.
NOTE
!$*5347)4(
50!.$$/7.
"544/.3!##%04
7)4(3%,%#4
"544/.
If only MIX1 is enabled (MIX2 set OFF), MIX1 will revert to default
settings (21% O2 and PO2 1.4 bar) after approximately 2 hours.
If MIX2 is set ON, settings for all mixes are stored until changed.If
either MIX2 or MIX3 have an oxygen content of 22% or greater,
settings for all mixes are stored until changed.
43
5.8.4. Setting the personal/altitude adjustments
The current Altitude and Personal Adjustment settings are displayed in the startup
screen when entering the DIVE mode. If the mode does not match the altitude or
personal conditions (see Section 5.9.4. Diving at altitude and Section 5.9.5. Personal
adjustments), it is imperative that you enter the correct selection before diving. Use
Altitude Adjustment to select the correct altitude and use Personal Adjustment to add
an extra level of conservatism.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
5.8.5. Setting the sample rate
The sample rate controls how often the depth, time, and water temperature is stored
in the memory. You can set the dive profile sample rate to 1, 10, 20, 30, or 60 seconds.
The factory default setting is 20 seconds.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
44
5.8.6. Setting the Safety Stops/Deep Stops
The Deep Stop setting allows you to choose between traditional Safety Stops or Deep
Stops. If Deep Stops are set to OFF, the traditional Safety Stop calculation is used. If
set to ON, iterative Deep Stops will be prompted instead. The length of the individual
Deep Stops can be set to 1 or 2 minutes.
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
5.8.7. Setting the RGBM values
For certain divers and diving conditions, it may be desirable to set the attenuated
RGBM mode. The selection is displayed during the DIVE mode startup. The options
are full RGBM effects (100%), and attenuated RGBM (50%).
!$*5347)4(50!.$
$/7."544/.3!##%04
7)4(3%,%#4"544/.
45
5.9. Activation and pre-checks
This section describes how to activate the DIVE mode and explains the pre-checks
that it is highly recommended you perform before you get into the water.
5.9.1. Accessing DIVE mode
The Suunto D6 has three diving modes: AIR mode for diving with standard air only,
NITROX mode for diving with oxygen enriched mixtures, and GAUGE mode for use
as a bottom timer and for freediving. The OFF mode disables the DIVE mode, and
allows the TIME mode to be used underwater. The chosen dive mode is displayed
when the DIVE mode is accessed, and you can toggle between the submodes by
pressing the UP/DOWN buttons.
5.9.2. DIVE mode activation
The dive computer activates automatically when submerged deeper than 0.5 m/1.5
ft. However, it is necessary to activate the DIVE mode BEFORE diving to check the
altitude and personal adjustment settings, battery condition, oxygen settings etc.
46
After activation, all display elements turn on showing mostly figure 8s and graphical
elements, and the backlight and the beep are activated. After this, the selected altitude
and personal settings are displayed, as well as the RGBM and Deep Stop status. A
few seconds later the battery power indicator is shown.
At this time, perform your pre-checks, making sure that:
• the instrument operates in the correct mode and provides a complete display
(AIR/NITROX/GAUGE mode)
• the battery level is ok
• the altitude, personal adjustment, Safety/Deep stops, and RGBM settings are
correct
• the instrument displays correct units of measurement (Metric/Imperial)
• the instrument displays the correct temperature and depth (0.0 m/0 ft)
• the alarm beeps
And, if set to NITROX mode, make sure that:
• the correct number of mixes is set and that the oxygen percentages are adjusted
according to the measured nitrox blends in your cylinders
• the oxygen partial pressure limits are set correctly
47
For more information on the NITROX mode, refer to Section 6.2. Diving in NITROX
mode (DIVEean) .
The dive computer is now ready for diving.
5.9.3. Battery power indication
Temperature or internal oxidation of the battery affect the battery voltage. If the
instrument is stored for a long period, or used in cold temperatures, the low battery
warning may be displayed even though the battery has enough capacity. In these
cases, re-enter DIVE mode to receive the battery power indication.
After the battery check, the Low Battery Warning is indicated by the battery symbol.
If the battery symbol is displayed in the Surface mode, or if the display is faded or
weak, the battery may be too low to operate the dive computer, and battery replacement
is recommended.
NOTE
48
For safety reasons, the backlight cannot be activated when the
low battery warning is indicated by the battery symbol.
5.9.4. Diving at altitude
The dive computer can be adjusted both for diving at altitude and also to increase the
conservatism of the mathematical nitrogen model.
When programming the instrument for the correct altitude, you need to select the
correct Altitude Adjustment settings according to Table 5.5, Altitude Adjustment settings.
The dive computer will adjust its mathematical model according to the entered altitude
setting, giving shorter no-decompression times at higher altitudes (see Table 9.1, Nodecompression time limits for various depths (m) and Table 9.2, No-decompression
time limits for various depths (ft) in Section 9.2. RGBM).
Table 5.5. Altitude Adjustment settings
Alt. adjustment value
Altitude range
A0
0 - 300 m / 0 - 1000 ft
A1
300 - 1500 m / 1000 - 5000 ft
A2
1500 - 3000 m / 5000 - 10 000 ft
NOTE
Section 5.8.4. Setting the personal/altitude adjustments describes
how the Altitude value is set.
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 by waiting
at least three hours before diving.
49
5.9.5. Personal adjustments
There are personal factors that can affect your susceptibility to DCI, which you can
predict in advance, and input into the decompression model. Such factors vary between
divers and also for the same diver from one day to another. The three-step Personal
Adjustment setting is available if a more conservative dive plan is desired and, for
very experienced divers, a two step adjustment for RGBM effect on repetitive dives
is available.
The personal factors which tend to increase the possibility of DCI include, but are not
limited to:
• cold exposure - water temperature less than 20 °C/68 °F
• below average physical fitness level
• fatigue
• dehydration
• previous history of DCI
• stress
• obesity
This feature is used to adjust the computer to be more conservative, according to
personal preference, by entering the suitable Personal Adjustment setting with the
help of Table 5.6, Personal Adjustment settings. In ideal conditions, retain the default
setting, P0. If conditions are more difficult, or any of the factors which tend to increase
the possibility of DCI exist, select P1, or even the most conservative P2. The dive
computer then adjusts its mathematical model according to the entered Personal
Adjustment setting, giving shorter no-decompression times (see Section 9.2.2. Nodecompression limits, Table 9.1, No-decompression time limits for various depths (m)
and Table 9.2, No-decompression time limits for various depths (ft) ).
50
Table 5.6. Personal Adjustment settings
Personal
Condition
adjustment
value
Desired tables
P0
Ideal conditions
Default
P1
Some risk factors or conditions
exist
Progressively more conservative
P2
Several risk factors or conditions
exist
The Suunto D6 also allows experienced divers who are willing to accept a greater
level of risk to adjust the RGBM model. The default setting is 100%, which gives full
RGBM effect. Suunto strongly advises you to use full RGBM effect. Statistically, very
experienced divers have less incidents with DCI. The reason for this is unknown, but
it is possible that some level of physiological and/or psychological accommodation
can take place when you are very experienced as a diver. Thus, for certain divers and
diving conditions, it may be desirable to set attenuated (50%) RGBM mode. See
Table 5.7, RGBM model settings.
Table 5.7. RGBM model settings
RGBM setting
Desired Tables
100%
Standard Suunto RGBM
model (Default)
Effect
Full RGBM effects
51
RGBM setting
Desired Tables
Effect
50%
Attenuated RGBM model
Smaller RGBM effects, higher risk!
5.10. Safety Stops
Safety Stops are widely considered good diving practice for recreational diving, and
are an integral part of most dive tables. The reasons for performing a Safety Stop
include: reducing sub-clinical DCI, microbubble reduction, ascent control, and
orientation before surfacing.
The Suunto D6 displays two different types of Safety Stops: Recommended Safety
Stop and Mandatory Safety Stop.
5.10.1. Recommended Safety Stops
With every dive over 10 meters, there is a three minute countdown for the
Recommended Safety Stop, to be taken in the 6 - 3 m/10 ft - 20 ft range. This is shown
with the STOP sign and a three-minute countdown in the center window instead of
the no-decompression time.
52
7(%.34/0)3$)30,!9%$
-!+%!2%#/--%.$%$3!&%49
34/0&/2-).54%3
NOTE
The Recommended Safety Stop, as the name implies, is
recommended. If it is ignored, there is no penalty applied to the
following surface intervals and dives.
5.10.2. Mandatory Safety Stops
When the ascent rate exceeds 10 m/33 ft per minute continuously for more than 5
seconds, the microbubble build-up is predicted to be more than is allowed for in the
decompression model. The Suunto RGBM calculation model responds to this by
adding a Mandatory Safety Stop to the dive. The time of this Mandatory Safety Stop
depends on the severity of the ascent rate excess.
The STOP sign appears in the display and when you reach the depth zone between
6 m and 3 m/20 ft and 10 ft, the CEILING label, ceiling depth, and the calculated Safety
Stop time also appear in the display. You should wait until the Mandatory Safety Stop
warning disappears. The total length of the Mandatory Safety Stop time depends on
the seriousness of the ascent rate violation.
53
7(%.#%),).'!.$34/0!2%
$)30,!9%$-!+%!/.%-).54%
-!.$!4/293!&%4934/0).4(%
$%04(:/.%"%47%%.-!.$-
You must not ascend shallower than 3 m/10 ft with the Mandatory Safety Stop warning
on. If you ascend above the Mandatory Safety Stop ceiling, a downward pointing arrow
will appear and a continuous beeping starts. You should immediately descend to, or
below, the Mandatory Safety Stop ceiling depth. If you correct this situation at any
time during the dive, there are no effects on the decompression calculations for future
dives.
7(%.#%),).'!.$34/0
!2%$)30,!9%$)--%$)!4%,9
7)4().-).54%3$%3#%.$
4//2"%,/7#%),).'
If you continue to violate the Mandatory Safety Stop, the tissue calculation model is
affected and the dive computer shortens the available no-decompression time for your
next dive. In this situation, it is recommended that you prolong your surface interval
time before your next dive.
54
5.11. Deep stops
The Suunto D6 allows you to choose a Deep Stop algorithm instead of the traditional
Recommended Safety Stop. Deep Stops are safety stops that occur deeper than
traditional stops, with the purpose of minimizing microbubble formation and excitation.
The Suunto RGBM model calculates deep stops iteratively, placing the first stop about
halfway between the maximum depth and the ceiling depth. After the first Deep Stop
is completed, another Deep Stop will be prompted halfway to the ceiling, and so on
until the ceiling depth is reached.
The Deep Stop length can be set to 1 or 2 minutes.
Enabling the Deep Stops disables the Recommended Safety Stops, but Mandatory
Safety Stops due to continuous ascent rate violations, for example, are still prompted.
55
6. DIVING
This section contains instructions on how to operate the dive computer and interpret
its displays. You’ll find that this dive computer is easy to use and read. Each display
shows only the data relevant to that specific diving mode.
6.1. Diving in AIR mode (DIVEair)
In this section, we look at how to make the most of the dive computer when diving
with standard air. To activate DIVEair mode, please see Section 5.9.1. Accessing
DIVE mode.
$)6%(!3*534"%'5.!.$
!6!),!",%./$%#/-02%33)/.
4)-%)3/6%2-).54%33/./
6!,5%)3$)30,!9%$
NOTE
The dive computer will remain in the Surface mode at depths less
than 1.2 m/4 ft. At depths greater than 1.2 m/4 ft the instrument
will go into the DIVE mode automatically. However, it is
recomended that you activate the DIVE Mode manually in order
to perform the necessary dive pre-checks.
6.1.1. Basic dive data
During a No-decompression dive, the following information is displayed:
56
•
•
•
•
your present depth in meters/feet
the available no-decompression time in minutes as NO DEC TIME
the ascent rate presented as a bar graph on the right side
the Diver Attention Symbol if surface interval should be prolonged (see Table 7.1,
Alarms)
$)6%$)30,!902%3%.4$%04()3-
./$%#/-02%33)/.34/04)-%,)-)4)3-).
-!8)-5-$%04($52).'4()3$)6%7!3-
%,!03%$$)6%4)-%)3-).
Alternative displays, by pressing the UP/DOWN buttons, show:
• the elapsed dive time in minutes, shown as DIVE TIME
• the water temperature in °C/°F
• the maximum depth during this dive in meters/feet, indicated as MAX
• the current time, shown as TIME
$/7."544/.4/'',%3
"%47%%.-!8)-5-$%04(
!.$#522%.44)-%
57
50"544/.4/'',%3
"%47%%.$)6%4)-%!.$
7!4%24%-0%2!452%
6.1.2. Bookmark
It is possible to record bookmarks in the profile memory during a dive. These bookmarks
are displayed when scrolling the profile memory on the display. The bookmarks will
also be shown as annotations in the downloadable Suunto Dive Manager PC software.
The bookmark logs the depth, time, and water temperature, as well as compass
heading (if the compass has been enabled). To make a bookmark in the profile memory
during a dive, press the SELECT button. A brief confirmation will be given.
!"//+-!2+)30,!#%$
).4(%02/&),%-%-/29
$52).'!$)6%"902%33).'
4(%3%,%#4"544/.
58
6.1.3. Ascent rate indicator
The ascent rate is shown graphically along the right side of the display. When the
maximum allowed ascent rate is exceeded, the fifth SLOW warning segment and the
STOP sign appear and the depth reading starts to blink, indicating that the maximum
ascent rate has been exceeded continuously or that the current ascent rate is
significantly above the allowed rate.
./2-!,
!3#%.4
2!4%
WARNING
!#4)6!4%$"!#+,)'(4!,!2-
!.$!",).+).'!3#%.42!4%"!2
'2!0().$)#!4%9/5!2%!3#%.$).'
&!34%24(!.--).9/5!2%!$6)3%$
4/-!+%!-!.$!4/293!&%4934/0
7(%.9/52%!#(!$%04(/&-
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). Continuous ascent rate
violations will result in Mandatory Safety Stops. When
Recommended Deep Stop is enabled, the length is indicated in
seconds.
59
6.1.4. Safety Stops and Deep Stops
If Deep Stops are not used, a 3 minute Recommended Safety Stop is prompted after
every dive to over 10m.
9/5!2%!$6)3%$4/-!+%!
$%%034/0!4-4(%3%#/.$
).$)#!4/23(/734(!49/5(!6%
3%#/.$3,%&4/&9/52$%%034/0
6.1.5. Decompression dives
When your NO DEC TIME becomes zero, your dive becomes a decompression dive
so you must perform one or more decompression stops on your way to the surface.
The NO DEC TIME on your display will be replaced by an ASC TIME, and a CEILING
notation will appear. An upward pointing arrow will also prompt you to start your ascent.
If you exceed the no-decompression limits on a dive, the dive computer will provide
the decompression information required for ascent. After this, the instrument will
continue to provide subsequent interval and repetitive dive information.
Rather than requiring you to make stops at fixed depths, the dive computer lets you
decompress within a range of depths (continuous decompression).
The ascent time (ASC TIME) is the minimum amount of time needed to reach the
surface in a decompression dive. It includes:
• the time needed to ascend to the ceiling at an ascent rate of 10 m per minute/33
ft per minute. The ceiling is the shallowest depth to which you should ascend
60
•
•
•
the time needed at the ceiling
the time needed at the Mandatory Safety Stop (if any)
the time needed to reach the surface after the ceiling and Safety Stops have been
completed
WARNING
YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN
DISPLAYED BY THE INSTRUMENT! The ascent time will
increase if you:
• remain at depth
• ascend slower than 10 m/33 ft per minute
• make your decompression stop deeper than at the ceiling
These factors will also increase the amount of air required to
reach the surface.
Ceiling, ceiling zone, floor and decompression range
When in decompression, it is important that you understand the meaning of ceiling,
floor, and decompression range.
• The ceiling is the shallowest depth to which you should ascend when in
decompression. At this depth, or below, you must perform all stops
• The ceiling zone is the optimum decompression stop zone. It is the zone between
the minimum ceiling and 1.8 m/6 ft below the minimum ceiling
• The floor is the deepest depth at which the decompression stop time will not
increase. Decompression will start when you pass this depth during your ascent
61
•
The decompression range is the depth range between the ceiling and floor. Within
this range, decompression takes place. However, it is important to remember that
the decompression will be very slow at, or close to, the floor
The depth of the ceiling and floor will depend on your dive profile. The ceiling depth
will be fairly shallow when you enter the decompression mode, but if you remain at
depth, it will move downward and the ascent time will increase. Likewise, the floor and
ceiling may change upwards while you are decompressing.
When conditions are rough, it may be difficult to maintain a constant depth near the
surface. In such cases, it is more manageable to maintain an additional distance below
the ceiling, to make sure that the waves do not lift you above the ceiling. Suunto
recommends that decompression takes place deeper than 4 m/13 ft, even if the
indicated ceiling is shallower.
NOTE
62
It will take more time and more air to decompress below the ceiling
than at the ceiling.
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.
Display below the floor
The blinking ASC TIME and an upward pointing arrow indicate that you are below the
floor. You should start your ascent immediately. The ceiling depth is shown on the left
side, and the minimum total ascent time on the right side, of the center window. Below
is an example of a decompression dive without Deep Stops, below the floor.
507!2$0/).4).'!22/7",).+).'!3#
4)-%!.$!.!,!2-4%,,9/54/!3#%.$
-).)-5-4/4!,!3#%.44)-%).#,5$).'3!&%49
34/0)3-).54%3#%),).')3!4-
Display above the floor
When you ascend above the floor, the ASC TIME display stops blinking and the upward
pointing arrow disappears. Below is an example of a decompression dive above the
floor.
63
507!2$0/).4).'!22/7(!3
$)3!00%!2%$!.$!3#4)-%,!"%,(!3
34/00%$",).+).'-%!.).'9/5!2%).
4(%$%#/-02%33)/.2!.'%
Decompression will now begin, but is very slow. You should therefore continue your
ascent.
Display at the ceiling zone
When you reach the ceiling zone, the display will show you two arrows pointing at
each other (the “hour glass” icon). Below is an example of a decompression dive at
the ceiling zone.
47/!22/730/).4!4%!#(/4(%2
h(/52',!33v 9/5!2%).4(%/04)-5-#%),).'
:/.%!4-!.$9/52-).)-5-!3#%.44)-%)3
-).54%3
64
During the decompression stop, ASC TIME will count down towards zero. When the
ceiling moves upwards, you can ascend to the new ceiling. You may surface only after
the ASC TIME and CEILING labels have disappeared, which means that the
decompression stop and any Mandatory Safety Stop have been completed. You are
advised, however, to stay until the STOP sign has also disappeared. This indicates
that the three minute Recommended Safety Stop has also been completed.
Display above the ceiling
If you ascend above the ceiling during a decompression stop, a downward pointing
arrow will appear and a continuous beeping starts.
$%#/-02%33)/.$)6%!"/6%#%),).'
./4%$/7.7!2$0/).4).'!22/7%2 7!2.).'
!.$!,!2-9/53(/5,$)--%$)!4,97)4().
-).54%3$%3#%.$4//2"%,/7#%),).'
In addition, an Error warning (Er) reminds you that you have only three minutes to
correct the situation. You must immediately descend to, or below, the ceiling.
If you continue to violate the decompression, the dive computer will go into a permanent
Error Mode. In this mode, the instrument can only be used as a depth gauge and timer.
You must not dive again for at least 48 hours. (See Section 5.7. Error conditions).
6.2. Diving in NITROX mode (DIVEean)
NITROX mode (DIVEean) is the second dive mode available in Suunto D6 and is used
when using oxygen- enriched gas mixtures.
65
6.2.1. Before diving in NITROX mode
If set to the NITROX mode, the correct oxygen percentage of the gas in your cylinder
must always be entered into the computer to ensure correct nitrogen and oxygen
calculations. The dive computer adjusts its mathematical nitrogen and oxygen
calculation models accordingly. The dive computer will not accept fractional percentage
values of oxygen concentration. Do not round up fractional percentages. For example,
31.8% oxygen should be entered as 31%. Rounding up will cause nitrogen percentages
to be understated and will affect decompression calculations. If you want to adjust the
computer to provide more conservative calculations, use the personal adjustment
feature to affect decompression calculations, or reduce the PO2 setting to affect oxygen
exposure according to the entered O2% and PO2 values. Calculations based on nitrox
use result in longer no-decompression times and shallower maximum depths than
diving with air.
As a safety precaution, the oxygen calculations in the computer are made with an
oxygen percentage of 1% + set O2% .
When the dive computer is set in NITROX mode, the Dive Planning mode calculates
using the O2% and PO2 values that are currently in the computer.
To set the nitrox mixes, refer to Section 5.8.3. Setting the nitrox values.
Default nitrox settings
In NITROX mode, the Suunto D6 allows you to set 1 or 2 nitrox mixes containing 2199% oxygen.
66
In the NITROX mode, the default setting for MIX1 is standard air (21% O2). It remains
in this setting until the O2% is adjusted to any other percentage of oxygen (22% 100%). The default setting for maximum oxygen partial pressure is 1.4 bar, however
you are able to set it in the range of 0.5 - 1.6 bar.
MIX2 is set to OFF by default. To set MIX2 , refer to Section 6.2.4. Gas change and
multiple breathing gas mixes. Oxygen percentages and maximum oxygen partial
pressures for MIX2 are stored permanently.
NOTE
If MIX2 is set OFF, the computer will retain the manually entered
values for the oxygen percentage and maximum oxygen partial
pressure for MIX1 for about two hours, after which it will revert to
the default settings. If MIX2 is set ON, the computer will retain
the settings until changed.
6.2.2. Oxygen displays
When NITROX mode is activated, the display will show the information in the figure
below. In NITROX mode, the maximum operational depth is calculated based on set
O2% and PO2 values.
.)42/8$)6%-/$%!#4)6!4)/.
-!8)-5-/0%2!4)/.!,$%04("!3%$/.
3%4/!.$0/"!2)3-
If set to NITROX mode, the Suunto D6 will additionally show on the alternative display:
67
•
•
•
•
•
•
•
the oxygen percentage, labeled O2%
the set oxygen partial pressure limit, labeled PO2
the current oxygen toxicity exposure, labeled OLF
maximum depth
current time
water temperature
dive time
$/7."544/.
4/'',%3"%47%%.
/-!8)-5-$%04(
!.$#522%.44)-%
50"544/.
4/'',%3
"%47%%.0/
/,&$)6%4)-%
!.$7!4%2
4%-0%2!452%
68
6.2.3. Oxygen limit fraction (OLF)
If set to NITROX mode, in addition to tracking the diver's exposure to nitrogen, the
instrument tracks the exposure to oxygen. These calculations are treated as entirely
separate functions.
The dive computer calculates separately for Central Nervous System oxygen toxicity
(CNS) and Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen
Toxicity Units (OTU). Both fractions are scaled so that the maximum tolerated exposure
for each is expressed as 100%.
The Oxygen Limit Fraction (OLF) displays only the value of the higher of the two
calculations. The oxygen toxicity calculations are based on the factors listed in Section
9.3 “Oxygen exposure”.
6.2.4. Gas change and multiple breathing gas mixes
One of Suunto D6’s special features is the possibility to set an additional nitrox mix to
be used during a dive. This feature can be activated by setting the MIX2 to ON and
entering other parameters in the same way as with the primary gas. Mix 2 settings
are held until you change them (they will not return to default settings automatically).
A dive is always started with MIX1. During the dive, the Suunto D6 enables you change
to another enabled mix, which is within the set maximum oxygen partial pressure. The
tissue calculation during the dive is based on the mix you have selected.
The Suunto D6 allows gas changes to enabled gas mixes during the dive. Gas changes
are made by following the procedure below:
69
#(!.').''!3-)83#2/,,
4(2/5'(%.!",%$-)8%3"9
02%33).'4(%50/2$/7.
"544/.33%,%#4.%7-)8"9
02%33).'4(%3%,%#4"544/.
NOTE
Mix number, O2%, and PO2 for the mixes are shown when
scrolling. If the set PO2 limit is exceeded , it will be shown with
the PO2 value blinking. The dive computer does not allow you to
change to a gas whose set PO2 is exceeded. In such a case, the
mix is shown but cannot be selected.
NOTE
If no button is pressed in 15 seconds, the dive computer will go
back to the dive display without changing the gas mix. Upon
ascent, the computer prompts you to change gas when the PO2
level you have set for the next mix allows a gas change.The
prompt is an audible 3 beeps and the current O2 mix starts to
blink.
6.3. Diving in GAUGE mode (DIVEgauge)
If set to GAUGE mode, the dive computer can be used as a bottom timer or as a
freediving instrument.
70
In the GAUGE mode, the total dive time is always displayed in minutes in the lower
right corner. In addition, a Dive Timer in the center window displays time in minutes
and seconds. The center window Dive Timer is activated at the start of the dive and
it can be reset during the dive and used as a stopwatch by pressing the SELECT
button.
"902%33).'4(%3%,%#4
"544/.$52).'!$)6%!"//+
-!2+)372)44%.).4(%02/&),%
-%-/294(%$)6%4)-%2)32%3%4
!.$4(%02%6)/53,94)-%$
).4%26!,)3$)30,!9%$"%,/7
NOTE
The GAUGE mode does not provide decompression information.
NOTE
There is no ascent rate monitoring in the GAUGE mode.
NOTE
If you dive with the GAUGE mode, it is not possible to change
between the modes before the no fly time has counted down.
71
7. AFTER DIVING
7.1. At the surface
Once back at the surface, Suunto D6 continues to provide post-dive safety information
and alarms. Calculations to enable repetitive dive planning also help to maximize diver
safety.
7.1.1. Surface interval
An ascent to any depth shallower than 1.2 m/4 ft will cause the DIVING display to be
replaced by the SURFACE display:
)4)3-).54%33).#%9/5352&!#%$&2/-!-).54%$)6%
4(%-!8)-5-$%04(7!3-4(%02%3%.4$%04()3-4(%
!)20,!.%39-"/,!.$./&,96!,5%).$)#!4%4(!49/53(/5,$./4&,9
&/2(/523-).54%34(%$)6%2!44%.4)/.39-"/,).$)#!4%34(!4
9/53(/5,$02/,/.'9/52352&!#%).4%26!,4)-%
Or, in the alternative displays, the following information will be shown:
• maximum depth of last dive in meters/feet
• dive time of last dive in minutes, shown as DIVE TIME
• the current time, shown as TIME
• the current temperature in °C/°F
If set to NITROX mode, the following information will also be shown:
• the oxygen percentage labeled O2%
72
•
•
the oxygen partial pressure labeled PO2
the current oxygen toxicity exposure labeled OLF
7.1.2. Dive numbering
Several repetitive dives are considered to belong to the same repetitive dive series
when the dive computer has not counted the no-fly time to zero. Within each series,
the dives are given individual numbers. The first dive of the series will be numbered
as DIVE 1, the second as DIVE 2, the third as DIVE 3, etc.
If you start a new dive with less than 5 minutes of surface interval time, the dive
computer interprets this as a continuation of the previous dive and the dives are
considered to be the same. The diving display will return, the dive number will remain
unchanged, and the dive time will begin where it left off. After 5 minutes on the surface,
subsequent dives are, by definition, repetitive. The dive counter displayed in the
Planning mode will increment to the next number if another dive is made.
Table 7.1. Alarms
Symbol on display
Indication
Diver Attention Symbol - Attenuated RGBM model set
Diver Attention Symbol - Extend Surface Interval
Violated Decompression Ceiling
Do Not Fly Symbol
73
7.1.3. Repetitive dive planning
The Suunto D6 includes a dive planner that allows you to review the no-decompression
limits on a subsequent dive, taking the residual nitrogen loading of previous dives into
consideration. The Dive Planning mode is explained in Section Dive Planning mode
(MEMplan) in Section 7.1.5. MEMORY mode .
7.1.4. Flying after diving
The no-fly time is shown in the center window next to the airplane image. Flying or
traveling to a higher altitude should be avoided at any time when the computer is
counting down the no-fly time.
The no-fly time is always at least 12 hours, or equivalent to the so-called desaturation
time (if longer than 12 hours). For desaturation times lower than 70 minutes, no nofly time is given.
In the Permanent Error mode and GAUGE mode the no-fly time is 48 hours.
The Divers Alert Network (DAN) recommends the following on no-fly times:
• A minimum surface interval of 12 hours would be required in order to be reasonably
assured a diver will remain symptom free upon ascent to altitude in a commercial
jetliner (altitude up to 2,400 m/8,000 ft)
• Divers who plan to make daily, multiple dives for several days, or make dives that
require decompression stops, should take special precautions and wait for an
extended interval beyond 12 hours before a flight. Further, the Undersea and
Hyperbaric Medical Society (UHMS) suggests divers using standard air cylinders
and exhibiting no symptoms of decompression illness wait 24 hours after their last
dive to fly in an aircraft with cabin pressure up to 2,400 m/8,000 ft. The only two
exceptions to this recommendation are:
74
If a diver has less than 2 hours total accumulated dive time in the last 48 hours,
a 12 hour surface interval before flying is recommended
• Following any dive that required a decompression stop, flying should be delayed
for at least 24 hours, and if possible, for 48 hours
Suunto recommends that flying is avoided until all the DAN and UHMS guidelines,
as well as the dive computer’s no-fly conditions, are satisfied
•
•
7.1.5. MEMORY mode
The memory options include a dive planner (MEMplan), dive logbook (MEMlog) and
dive history (MEMhis). They are accessed from DIVE mode and you can toggle between
them by using the UP/DOWN buttons.
The dive time and date are registered in the Logbook memory. Always check before
diving that the time and date are correctly set, especially after traveling between
different time zones.
Dive Planning mode (MEMplan)
The Dive Planning mode displays no-decompression times for a new dive, taking into
account the effects of previous dives.
75
When entering the MEMplan mode, the display first briefly shows the remaining
desaturation time before going into plan mode.
By pressing the UP/DOWN buttons, you can scroll the no-decompression limits in 3
m/10 ft increments ending at 45 m/150 ft. No-decompression limits longer than 99min
are displayed as “—“.
7(%.%.4%2).'4(%-%-0,!.-/$%4(%$)30,!9&)234"2)%&,9
3(/734(%2%-!).).'$%3!452!4)/.4)-%"%&/2%'/).').4/0,!.-/$%
53%50!.$$/7."544/.34/3#2/,,$)&&%2%.4./$%#/-02%33)/.,)-)43
./$%#/-02%33)/.,)-)43,/.'%24(!.-).54%3!2%$)30,!9%$!3hnv
The Planning mode takes into account the following information from previous dives:
• any calculated residual nitrogen
• all dive history for the past four days
The no-decompression times given for different depths will therefore be shorter than
before your first “fresh” dive.
You can exit the planning mode by pressing the MODE button.
76
NOTE
The Planning mode is disabled in GAUGE mode and in Error
mode (see Section 5.7. Error conditions). The planning mode
calculates no-decompression times for MIX1 only. If an additional
mix is enabled in the NITROX mode, it does not affect the
calculations in MEMplan mode.
Higher Altitude and conservative Personal Adjustment settings will shorten the nodecompression time limits. These limits at different Altitude and Personal Adjustment
setting selections are explained in Section 5.9.4. Diving at altitude and in Section 5.9.5.
Personal adjustments
Dive numbering shown during dive planning
Dives belong to the same repetitive dive series if the instrument was still counting
down the no-fly time at the beginning of the dive.
The surface interval must be at least 5 minutes for a dive to be considered a repetitive
dive. Otherwise, it is considered a continuation of the same dive. The dive number
will not change and the dive time will continue where it left off. (See also Section 7.1.2.
Dive numbering ).
Dive logbook (MEMlog)
The Suunto D6 has a very sophisticated, high capacity Logbook and Profile Memory.
The data is recorded in the profile memory based on the selected sample rate. Dives
shorter than the recording interval are not registered (see Section 5.8.5. Setting the
sample rate).
77
The END OF LOGS text is displayed between the oldest and most recent dive. The
following information will be shown on three pages:
4(%2%!2%4(2%%0!'%3/&,/'"//+$)6%
).&/2-!4)/.53%3%,%#4"544/.4/3#2/,,
"%47%%.,/'"//+0!'%3)))!.$))) 4(%$!4!/&
4(%-/342%#%.4$)6%)33(/7.&)234
Page I, main display
• Maximum depth (NOTE! Depending on the sampling rate, the reading may differ
from the maximum depth reading of the Dive History up to 0.3 m/1 ft.)
• date of dive
• type of dive (Air, Ean, Gauge)
• dive start time
• dive number
• oxygen percentage for Mix1
• total dive time
Page II
• maximum depth
78
• surface time before previous dive
• warnings
Page III
• depth/time profile of the dive
• real-time water temperature
The memory will retain approximately the last 36 hours of dive time. After that, when
new dives are added, the oldest dives are deleted. The contents of the memory will
remain when the battery is changed (providing that the battery has been replaced
according to the instructions).
NOTE
Several repetitive dives are considered to belong to the same
repetitive dive series if the no-fly time has not ended. See
Section 7.1.2. Dive numbering for further information.
Dive history (MEMhis)
The Dive History is a summary of all the dives recorded by the dive computer. The
following information will be shown on the display:
$)6%()34/29$)30,!9
4/4!,.5-"%2/&$)6%3$)6%
(/523!.$-!8)-5-$%04(
79
The Dive History Memory can hold a maximum of 999 dives and 999 diving hours.
When these maximum values are reached, the counters will start again from zero.
NOTE
The maximum depth can be reset to 0.0 m/0 ft using the PCInterface unit and the downloadable Suunto Dive Manager
software.
7.1.6. Suunto Dive Manager (SDM)
Suunto Dive Manager (SDM) is optional PC software that greatly enhances the
functionality of your Suunto D6. With the SDM software, you can download dive data
from your dive computer to your PC. You can then view and organize all the data
recorded with your Suunto D6. You can also plan dives, print copies of your dive
profiles and upload your dive logs to share with your friends at SuuntoSports.com.
You can always download the latest version of Suunto Dive Manager from
www.suunto.com or www.SuuntoSports.com. Please check for updates regularly as
new features are constantly being developed.
The following data is transferred to your PC:
• depth profile of the dive
• dive time
• preceding surface interval time
• dive number
• dive start time (year, month, day and time)
• dive computer settings
• oxygen percentage settings and maximum OLF (in NITROX mode)
• tissue calculation data
80
real-time water temperature
additional dive information (e.g. SLOW and Mandatory Safety Stop violations, Diver
Attention Symbol, Bookmark, Surfaced Mark, Decompression Stop Mark, Ceiling
Error Mark, Gas Change)
• dive computer serial number
• personal information (30 characters)
Using SDM, you are able to enter setup options such as:
• input a personal, 30-character field into the Suunto D6
• reset the Dive History’s maximum depth to zero
It is also possible to manually add comments, multimedia and other personal information
to the PC-based dive data files.
•
•
7.1.7. SuuntoSports.com
When you have dived and transferred your dive data to your Suunto Dive Manager,
you can share your best experiences with other diving enthusiasts at SuuntoSports.com.
It's a free and open Internet community where you can compare your underwater
experiences with other Suunto users and learn from each other.
SuuntoSports.com includes three sections.
In My Suunto you can register your dive computer and manage your membership
profile. The section also contains a personal event calendar.
81
The Communities section is meeting a place for smaller groups of SuuntoSports.com
members. Here you can create and manage your own communities and search for
others. All communities have a home page that lists the latest group activities.
Community members can also use group-specific bulletin boards and calendars, create
their own link lists and group activities. All registered SuuntoSports.com users
automatically become members of the ‘World of Suunto Sports’ community.
The Sport forums include sport-specific news, bulletin boards, event calendars, ranking
lists and discussions. You can also exchange experiences and read travel reports
written by other members.
To learn more about SuuntoSports.com’s functions and activities, visit the site, try
them and, if necessary, use the site Help. The Help is available on the right side of
the bar that divides the screen.
82
8. CARE AND MAINTENANCE
The Suunto D6 dive computer is a sophisticated precision instrument. Though designed
to withstand the rigors of scuba diving, you must handle your Suunto D6 with care,
and follow the advice below on how to maximize its service life.
8.1. Water contacts and buttons
Contamination or dirt on the water contacts/connector or buttons may prevent the
automatic activation of the DIVE mode and cause problems during data transfer.
Therefore, it is important that the water contacts and push buttons are kept clean. If
the water contacts of the instrument are active (AC-text remains on the display) or the
DIVE mode activates on its own, the reason is probably contamination or invisible
marine growth that may create an unwanted electric current between the contacts. It
is important that the dive computer is carefully washed in fresh water after the day's
diving is completed. The contacts can be cleaned with fresh water and, if necessary,
a mild detergent and a soft brush.
8.2. Care of your dive computer
• NEVER try to open the case of the dive computer
• Have your dive computer serviced every two years or after 200 dives (whichever
comes first) by an authorized Suunto representative. This service will include a
general operational check, replacement of the battery, and a water resistance
check. The service requires special tools and training, so do not attempt to carry
out any service that you are not competent to perform
• If moisture appears inside the case, have the instrument checked immediately by
your Suunto representative
83
•
•
•
•
•
•
•
If you detect scratches, cracks or other such flaws on the display that may impair
its durability, have it replaced immediately by your Suunto representative
Check the strap and the buckle for flaws. If needed, have them replaced by your
Suunto representative
Wash and rinse the unit in fresh water after every use
Protect the unit from shock, extreme heat, direct sunlight, and chemical corrosion.
The dive computer cannot withstand the impact of heavy objects like scuba
cylinders, nor chemicals like gasoline, cleaning solvents, aerosol sprays, adhesive
agents, paint, acetone, alcohol etc. Chemical reactions with such agents will
damage seals, the case, and the finish
Store your dive computer in a dry place when you are not using it
The dive computer displays a battery symbol as a warning when the power gets
too low. When this happens, the instrument should not be used until the battery
has been replaced. Also refer to Section 5.9. Activation and pre-checks
Do not fasten the strap of your dive computer too tightly. You should be able to
insert your finger between the strap and your wrist
8.3. Maintenance
If left without care for an extended period, a thin film, often invisible to the naked eye,
will cover the unit. Much like the build-up on the glass of an aquarium, this film is the
result of organic contaminants found in both salt and fresh water. Suntan oil, silicone
spray and grease will speed up this process. As a result of this build-up, moisture will
be trapped next to the water contacts and will prevent your Suunto D6 from operating
properly.
The water contacts can be cleaned with a small brush (e.g. toothbrush).
84
IMPORTANT: Your Suunto D6 should be soaked, then thoroughly rinsed with fresh
water and dried with a soft towel after each dive. Make sure that all salt crystals and
sand particles have been flushed out. Check the display for possible moisture or water,
and do not use the Suunto D6 if you detect any moisture or water inside.
CAUTION
•
•
•
Do not use compressed air to blow water off the unit.
Do not use solvents or other cleaning fluids that might cause
damage.
Do not test or use the dive computer in pressurized air.
8.4. Water resistance inspection
The water resistance of the unit must be checked after replacing the battery or after
other service operations. The check requires special equipment and training.
You must frequently check the display for any sign of leaks. If you find moisture inside
your dive computer, there is a leak. A leak must be corrected without delay, as moisture
will seriously damage the unit, even beyond repair. Suunto does not take any
responsibility for damage caused by moisture in the dive computer, if the instructions
of this manual have not been carefully followed.
In the event of a leak, immediately take the dive computer to an authorized Suunto
representative.
85
8.5. Battery replacement
NOTE
It is advisable to contact an authorized Suunto representative for
battery replacement. It is imperative that the change is made in
a proper manner to avoid any leakage of water into the battery
compartment or computer.
CAUTION
Defects caused by improper battery installation are not covered
by the warranty.
CAUTION
When the battery is changed, all nitrogen and oxygen uptake data
is lost. Therefore, the no-fly time shown by the computer should
have reached zero or you must wait for 48 hours, or preferably
up to 100 hours, before you dive again.
All history and profile data, as well as the altitude, personal, and alarm settings, will
remain in the dive computer memory after the battery change. However, the clock
time and time alarm setting are lost. In the NITROX Mode, the nitrox settings also
revert back to default settings (MIX1 21 % O2, 1.4 bar PO2, MIX2 OFF).
86
9. TECHNICAL DATA
9.1. Technical specifications
Dimensions and weight:
• Diameter: 50.0 mm/1.97 in
• Thickness: 16.0 mm/0.61 in
• Weight: 113g/3.98 oz
Depth gauge:
• Temperature compensated pressure sensor
• Salt water calibrated, in fresh water the readings are about 3% smaller (calibrated
in compliance with EN 13319)
• Maximum depth of operation: 100 m/328 ft (complying with EN 13319)
• Accuracy: ± 1% of full scale or better from 0 to 80 m/262 ft at 20°C/68°F (complying
with EN 13319)
• Depth display range: 0 to 150 m/492 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/-9 to +122°F
• Accuracy: ± 2°C/± 3.6°F within 20 minutes of temperature change
Calendar clock:
• Accuracy: ± 25 s/month (at 20°C/68°F)
• 12/24 h display
Other displays:
87
Displays only in NITROX mode:
• Oxygen %: 21 - 99
• Oxygen partial pressure display: 0.2 - 3.0 bar, depending on the limit setting
• Oxygen Limit Fraction: 1 - 200% with 1% resolution
Logbook/dive profile memory:
• Recording interval: 20 seconds adjustable (1,10,20,30,60s). Records the maximum
depth and minimum temperature of each interval
• Memory capacity: approximately 36 hours of diving with 20 second recording
interval
• Depth accuracy: 0.3 m/1 ft
Operating conditions:
• Normal altitude range: 0 to 3,000 m/10,000 ft above sea level
• Operating temperature: 0°C to 40°C/32°F to 104°F
• Storage temperature: -20°C to +50°C/ -4°F to +122°F
It is recommended that the instrument be stored in a dry place at room temperature.
NOTE
Do not leave the dive computer in direct sunlight!
Tissue calculation model:
• Suunto Deep Stop RGBM algorithm (developed by Suunto and Bruce R. Wienke,
BSc, MSc, PhD)
• 9 tissue compartments
• Tissue compartment halftimes: 2.5, 5, 10, 20, 40, 80, 120, 240 and 480 minutes
(on gassing). The off gassing halftimes are slowed down
88
•
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 EAN and oxygen exposure calculations are based on recommendations by
R.W. Hamilton, PhD and currently accepted exposure time limit tables and principles
Battery:
• One 3 V lithium battery: CR 2450
• Battery storage time (shelf life): Up to three years
• Replacement: Every three years, or more often depending on dive activity
• Life expectancy at 20°C/68°F:
• 0 dives/y - 3 years
• 100 dives/year – 2 years
• 300 dives/year – 1.5 years
The following conditions have an effect on the expected battery lifetime:
• The length of the dives
• The conditions in which the unit is operated and stored (e.g. temperature/cold
conditions). Below 10°C/50°F the expected battery lifetime is about 50-75% of that
at 20°C/68°F
• The use of the backlight and audible alarms
• The use of the compass
• The quality of the battery. (Some lithium batteries may exhaust unexpectedly,
which cannot be tested in advance)
• The time the dive computer has been stored until it gets to the customer. (The
battery is installed in the unit at the factory)
89
NOTE
Low temperature or an internal oxidation of the battery may
activate the battery warning even though the battery has enough
capacity. In this case, the warning usually disappears when the
DIVE mode is activated again.
9.2. RGBM
The Suunto Reduced Gradient Bubble Model (RGBM) is a modern algorithm for
predicting both dissolved and free gas in the tissues and blood of divers. It was
developed in co-operation between Suunto and Bruce R. Wienke BSc, MSc, PhD. It
is based on both laboratory experiments and diving data, including data from DAN.
It is a significant advance on the classical Haldane models, which do not predict free
gas (microbubbles). The advantage of Suunto RGBM is additional safety through its
ability to adapt to a wide variety of situations. Suunto RGBM addresses a number of
diving circumstances outside the range of dissolved-gas-only models by:
• Monitoring continuous multiday diving
• Computing closely spaced repetitive diving
• Reacting to a dive deeper than the previous dive
• Adapting to rapid ascents which produce high microbubble (silent-bubble) buildup
• Incorporating consistency with real physical laws for gas kinetics
90
9.2.1. Suunto RGBM adaptive decompression
The Suunto RGBM algorithm adapts its predictions of both the effects of microbubble
build-up and adverse dive profiles in the current dive series. It also changes these
calculations according to the personal adjustment you select.
The pattern and speed of decompression at the surface is adjusted according to
microbubble influence.
On repetitive dives, adjustment may also be applied to the maximum allowable nitrogen
overpressure in each theoretical tissue group.
Depending on the circumstances, Suunto RGBM will adapt the decompression
obligations by doing any or all of the following:
• Reducing No-decompression Stop dive times
• Adding Mandatory Safety Stops
• Increasing Decompression Stop times
• Advising an extended surface interval (Diver Attention symbol)
Diver Attention Symbol – Advice to Extend Surface Interval.
Some patterns of diving cumulatively add a higher risk of DCI; for example, dives with
short surface intervals, repetitive dives deeper than earlier ones, multiple ascents,
and substantial multiday diving. When this is detected, in addition to adapting the
decompression algorithm, the Suunto RGBM model will in some circumstances also
advise, with the Diver Attention Symbol, that you extend your surface interval.
91
9.2.2. No-decompression limits
The no-decompression limits displayed by the dive computer for the first dive to a
single depth (see Table 9.1, No-decompression time limits for various depths (m) and
Table 9.2, No-decompression time limits for various depths (ft) .), are slightly more
conservative than those permitted by the U.S. Navy tables.
Table 9.1. No-decompression time limits for various depths (m)
No-decompression time limits (mins) for various depths (m) for the first
dive of a series
Depth
(m)
Personal Mode / Altitude Mode
P0/A0
P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2
9
12
15
-124
72
163
89
57
130
67
43
163
89
57
130
67
43
96
54
35
130
67
43
96
54
35
75
45
29
18
21
24
52
37
29
39
29
24
30
23
19
39
29
24
30
23
19
5
20
16
30
23
19
25
20
16
21
15
12
27
30
33
23
18
13
18
14
11
15
12
9
18
14
11
15
12
9
12
9
8
15
12
9
12
9
8
9
7
6
92
No-decompression time limits (mins) for various depths (m) for the first
dive of a series
Depth
(m)
36
39
42
45
Personal Mode / Altitude Mode
P0/A0
11
9
7
6
P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2
9
7
6
5
8
6
5
5
9
7
6
5
8
6
5
5
6
5
4
4
8
6
5
5
6
5
4
4
5
4
4
3
Table 9.2. No-decompression time limits for various depths (ft)
No-decompression time limits (mins) for various depths (ft) for the first
dive of a series
Depth
(ft)
Personal Mode / Altitude Mode
P0/A0 P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2
30
40
50
-120
69
160
86
56
127
65
41
160
86
56
127
65
41
92
52
34
127
65
41
92
52
34
73
43
28
60
70
80
50
36
28
38
29
23
29
22
19
38
29
23
29
22
19
25
20
15
29
22
19
25
20
15
20
15
11
93
No-decompression time limits (mins) for various depths (ft) for the first
dive of a series
Depth
(ft)
Personal Mode / Altitude Mode
P0/A0 P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2
90
100
110
22
17
13
18
14
11
15
11
9
18
14
11
15
11
9
11
9
7
15
11
9
11
9
7
9
7
6
120
130
140
150
10
9
7
6
9
7
6
5
8
6
5
4
9
7
6
5
8
6
5
4
6
5
4
4
8
6
5
4
6
5
4
4
5
4
4
3
9.2.3. Altitude 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 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, the instrument must be set to the Altitude Adjustment mode
to adjust the calculations for the new altitude. The maximum partial pressures of
nitrogen allowed by the mathematical model of the dive computer are reduced according
to the lower ambient pressure.
94
As a result, the allowed no-decompression-stop limits are considerably reduced.
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
• for recreational scuba diving, the recommended upper limit of 1.4 bar PO2 is used
as a default
• the CNS % limits up to 1.6 bar 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 will be shown before and during a dive when the computer
is set in NITROX mode:
• the selected O2% on the alternative display
• OLF% alternative display for either CNS% or OTU% (whichever is larger)
• audible alarms are given and the OLF value starts to blink when the 80% and 100%
limits are exceeded
• audible alarms are given and the actual PO2 value blinks when it exceeds the
preset limit
• in dive planning, the maximum depth according to the O2% and maximum PO2
selected
95
10. INTELLECTUAL PROPERTY
10.1. Copyright
This user's manual is copyrighted and all rights are reserved. It may not, in whole or
in part, be copied, photocopied, reproduced, or translated to any media without prior
written consent from Suunto.
10.2. Trademark
Suunto, D6, Consumed Bottom Time (CBT), Oxygen Limit Fraction (OLF), Suunto
Reduced Gradient Bubble Model (RGBM), and Continuous Decompression and their
logos are all registered or unregistered trademarks of Suunto. All rights are reserved.
10.3. Patent notice
This product is protected by the following patents and patent applications: US 5,845,235
and US11/152,075. Other patents have been applied for.
96
11. DISCLAIMERS
11.1. User’s responsibility
This instrument is intended for recreational use only. Suunto D6 must not be used for
obtaining measurements that require professional or industrial precision.
11.2. Limits of liability and ISO 9001 compliance
Suunto Oy does not assume any responsibility for losses or claims by third parties,
which may arise through the use of this device.
Due to continuous product development, the Suunto D6 is subject to change without
notice.
ISO 9001
Suunto Oy’s Quality Assurance System is certified by Det Norske Veritas to be in
accordance with ISO 9001 in all Suunto Oy's operations (Quality Certificate No. 96HEL-AQ-220).
97
11.3. After sales service
If a claim under warranty appears to be necessary, return the product, freight prepaid,
to your Suunto representative, who is responsible for having your product repaired or
replaced. Depending on the requirements in your country, include your name, address,
proof of purchase and/or Warranty card, which can be found at the back of this manual.
The claim will be honored and the product repaired or replaced at no charge and
returned in what your Suunto representative determines a reasonable amount of time,
provided that all necessary parts are in stock. All repairs that are not covered under
the terms of this warranty will be made at the owner's expense. This warranty is nontransferable from the original owner.
You can locate your local Suunto representative at www.suunto.com.
98
12. WARRANTY
NOTE
Warranty arrangements vary from country to country. The dive
computer packaging contains information regarding the warranty
benefits and requirements applicable to your purchase.
This Suunto dive computer is warranted against defects in workmanship and materials
for a period of two years after purchase to the original owner subject to and in
accordance with the terms and conditions set forth below:
The dive computer should be serviced and repaired only by an authorized Suunto
representative.
This warranty does not cover damage to the product resulting from improper usage,
improper maintenance, neglect of care, alteration or unauthorized repair. This warranty
will automatically become void if proper preventive maintenance procedures have not
been followed as outlined in the use and care instructions for this product.
All implied warranties, including but not limited to the implied warranties of
merchantability and fitness for a particular purpose, are limited from the date of
purchase and in scope to the warranties expressed herein. Suunto shall not be liable
for loss of use of the product or other incidental or consequential costs, expenses or
damage incurred by the purchase. All warranties not stated herein are expressly
disclaimed.
Some states do not allow the exclusion or limitation of implied warranties of
consequential damages, so the above exclusions or limitations may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that
vary from state to state.
99
This warranty does not cover any representation or warranty made by representatives
beyond the provisions of this warranty. No Suunto representative is authorized to
make any modifications to this warranty or to make any additional warranty.
Battery replacement is not covered by this warranty.
This User's Guide should be kept with your dive computer.
Suunto's dive computers and wristop computers can be registered online at
www.suunto.com. Registering your unit makes it quicker and easier for us to help you
if you ever need to send your product for servicing, or if you need information about
using your unit from our Global Help Desk.
100
13. DISPOSAL OF THE DEVICE
Please dispose of the device in an appropriate way, treating
it as electronic waste. Do not throw it in the garbage. If you
wish, you may return the device to your nearest Suunto
representative.
101
GLOSSARY
Altitude dive
A dive made at an elevation greater than 300 m/1000 ft above sea level.
Ascent rate
The speed at which the diver ascends toward the surface.
ASC RATE
Abbreviation for ascent rate.
Ascent time
The minimum amount of time needed to reach the surface on a
decompression stop dive.
ASC TIME
Abbreviation for ascent time.
Ceiling
On a decompression stop dive, the shallowest depth to which a diver may
ascend based on computed nitrogen load.
CNS
Abbreviation for central nervous system toxicity.
Central nervous system toxicity
Toxicity 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. Also note Oxygen Limit
Fraction
Compartment
See "Tissue group".
DAN
Abbreviation for Divers Alert Network.
DCI
Abbreviation for decompression illness.
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.
102
Decompression 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. Commonly called "the bends"
or "DCI".
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.
EAD
Abbreviation for equivalent air depth.
EAN
Abbreviation for enriched air nitrox.
Enriched air nitrox
Also called nitrox or Enriched Air = EANx. Air that has some oxygen
added. Standard mixes are EAN32 (NOAA Nitrox I = NN I) and EAN36
(NOAA Nitrox II = NN II).
Equivalent air depth
Nitrogen partial pressure equivalent table.
Floor
The deepest depth during a decompression stop dive at which
decompression takes place.
Half time
After a change in ambient pressure, the amount of time required for the
partial pressure of nitrogen in a theoretical compartment to go half way
from its previous value to saturation at the new ambient pressure.
Multi level dive
A single or repetitive dive that includes time spent at various depths and
whose no decompression limits are therefore not determined solely by
the maximum depth attained.
103
Nitrox
In sports diving, refers to any mix with a higher fraction of oxygen than
standard air.
NOAA
United States National Oceanic and Atmospheric Administration.
No decompression 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.
OEA = EAN = EANx
Abbreviations for oxygen enriched air nitrox.
OLF
Abbreviation for oxygen limit fraction.
OTU
Abbreviation for oxygen tolerance unit.
Oxygen tolerance unit
Used to measure the whole-body-toxicity.
Oxygen limit fraction
A term used by Suunto for the values displayed in the oxygen toxicity
bargraph. The value is either the CNS% or the OTU%.
O2%
Oxygen percentage or oxygen fraction in the breathing gas. Standard air
has 21% oxygen.
Oxygen partial pressure
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.
PO2
Abbreviation for oxygen partial pressure.
RGBM
Abbreviation for Reduced Gradient Bubble Model.
104
Reduced Gradient Bubble Model
Modern algorithm for tracking both dissolved and free gas in divers.
Repetitive dive
Any dive whose decompression time limits are affected by residual
nitrogen absorbed during previous dives.
Residual nitrogen
The amount of excess nitrogen remaining in a diver after one or more
dives.
SURF TIME
Abbreviation for surface interval time.
Surface interval time
Elapsed time between surfacing from a dive and beginning a descent for
the subsequent repetitive dive.
Tissue group
Theoretical concept used to model bodily tissues for the construction of
decompression tables or calculations.
Whole-body toxicity
Another form of oxygen toxicity, which is 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. Also called Pulmonary Oxygen Toxicity.
See also OTU.
105
Model of
Wristop computer:
Date of purchase
Serial
number:
Store Country
Place of purchase/Store name
Store City
Store stamp with date of purchase
Name
City
E-mail
Country
Address
Telephone
Signature
Download PDF
Similar pages
User Manual Nanight Tech v1.1
MARES PUCK AIR DIVE COMPUTER
IQ-700 PC Interface Manual ()
MARES NEMO AIR DIVE COMPUTER
User Manual Nanight Sport v1.1
Suunto X6 User's Manual