USERS GUIDE
Present Depth Maximum Depth Average Depth in Logbook Fast Ascent Warning (SLOW) AC Indicator
Current Time Display Surface Interval Time
Bar Graph: - Mode Indicator Data Transfer

AVG MAX

Bar Graph: - Ascent Rate - Battery Power - Mode Indicator

SURF TIME MAX O2%

AM/PM Indicator

F R EE

Temperature Maximum Depth Mode Text Oxygen Percentage in Nitrox Mode Week Day Timer Hours and Minutes

Diver Attention Symbol

DIVE TIMER PO2

ft m F C

Dive Time Dive Counter Time Dual Time Day, Month Timer Seconds Downtimer
Daily Alarm On Indicator Dive Alarm On Indicator

Low Battery Warning

SUUNTO

QUICK REFERENCE GUIDE

DEFINITION OF WARNINGS, CAUTIONS AND NOTES Throughout this manual, special references are made when deemed important. Three classications are used to separate these references by their order of importance. WARNING - is used in connection with a procedure or situation that may result in serious injury or death. CAUTION - is used in connection with a procedure or situation that will result in damage to the product. NOTE - is used to emphasize important information. COPYRIGHT, TRADEMARK AND PATENT NOTICE This instruction manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any media without prior written consent from SUUNTO. SUUNTO, D3 and their logos are all registered or unregistered trademarks of SUUNTO. All rights are reserved. Patents have been issued or applied for one or several features of this product. CE The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC. The SUUNTO dive instruments fulll all the required EU directives. FIOH, Laajaniityntie 1, FIN-01620 Vantaa, Finland, notied body no.0430, has
EC type-examined this type of personal protective equipment. This instrument must be serviced by an authorized dealer every second year or after 200 dives (whichever comes rst). See chapter 6. PrEN 13319 PrEN 13319 Diving accessories Depth gauges and combined depth and time measuring devices Functional and safety requirements, test methods is a European diving depth gauge standard draft. The D3 is designed to comply with this draft standard. ISO 9001 SUUNTO Oys Quality Assurance System is certied by Det Norske Veritas to be according to the ISO 9001 in all SUUNTO Oys operations (Quality Certicate No. 96-HEL-AQ-220). 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 D3 is subject to change without notice.

WARNING

Read this manual. Carefully read this instruction manual in its entirety paying close attention to all warnings listed below, including chapter 1.1. Safety Precautions. Make sure that you fully understand the use, displays and limitations of the instrument because any confusion resulting from neglecting to follow this instruction manual or from improper use of this device may cause a diver to commit errors that may lead to serious injury or death.
Suunto also recommends you to be trained in freediving technique and physiology before conducting breath holding dives. No diving instrument can replace the need for proper diving training. Insufcient or improper training may cause diver to commit errors that may lead to serious injury or death.
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 settings.
Use back-up instruments. Make sure that you use back-up instrumentation including a depth gauge, submersible pressure gauge, timer or watch, and have access to decompression tables whenever diving with a bottom timer.
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 and personal adjustments are correct. Also, exit the Data Transfer mode before diving, as the computer does not automatically revert to Dive mode from Data Transfer mode.

1.1. SAFETY PRECAUTIONS

Do not attempt to use D3 without reading this instruction 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 freediving computer, contact your SUUNTO dealer before diving with the D3. Always remember that you are responsible for your own safety. When used properly, this freediving computer is an outstanding tool for assisting properly trained, certied divers in planning and executing sport dives. It is not a substitute for certied scuba instruction or freediving training.

1.1.1. EMERGENCY ASCENTS

In the unlikely event that D3 malfunctions during a dive, follow the emergency procedures provided by your certied dive training agency or, alternatively, STEP 1: Assess the situation calmly and then move promptly to less than 18 m [60 ft]. STEP 2: At 18 m [60 ft], slow down your ascent rate to 10 m/min [33 ft/min] and move to a depth between 3 and 6 meters [10 to 20 ft]. STEP 3: Stay there as long as you assess your air supply will safely allow. After reaching the surface stay out of the water for at least 24 hours.

1.1.2. FREEDIVING

Freediving, and particularly freediving in combination with scuba diving, may have risks that have not been researched and are not commonly known.
Any person who engages in any form of breathhold diving is in danger of shallowwater blackout (SWB) i.e. 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 signicant. Therefore, provided the effort involved in freediving has not been severe, there is little risk in diving after breathhold diving. However, the converse is more unknown and may increase signicantly the risk of DCI. Therefore, FREEDIVING AFTER SCUBA DIVING IS NOT RECOMMENDED. You should avoid freediving and not exceed ve meters [16 ft] for at least two hours after scuba diving. Suunto also recommends you to be trained in freediving technique and physiology before conducting breathhold dives. No dive computer can replace the need for proper dive training. Insufcient or improper training may cause a diver to commit errors that may lead to serious injury or death.
Fig. 2.1. The push buttons of the D3.

2. GETTING ACQUAINTED

2.1. FUNCTIONS
The D3 wristop computer is a multipurpose dive instrument and a sport watch featuring different watch and dive computer modes. You can select the dive computer model between Gauge diving mode (GAUGE) and Freediving mode (FREE). The GAUGE and FREE modes can also be disabled (set to OFF) and the instrument can be used as a sports watch on land or in water.

2.2. PUSH BUTTONS

The D3 is controlled with four push buttons as follows (see Fig. 2.1.). M (MODE) To change from a main mode to an other main mode press the mode button. To exit from a submode to a main mode press the mode button. To activate the electroluminescent backlight hold down the mode button for more than two seconds or one second in the diving mode. To accept the settings in the Setting Mode press the mode button. To select a submode press the select button. To select the active segment in the Setting Mode press the select button. To select the display in the Logbook Mode press the select button.

Fig. 2.5. The timekeeping display a)the date is displayed b)the seconds are displayed
selected option. The TIMER text blinks on the display if the stopwatch is running. The display is illuminated by holding down the M button for more than two seconds. To set the time and date, refer to chapter 4.1 Setting Time, Date and Dual Time. When diving, the dive entry time and date is registered in the Logbook Memory. Remember always to check before diving that the time and date are correctly set, especially when traveling to different time zones.
Fig. 2.6. The Stopwatch function is indicated by the TIMEr UP text and a mode indicator.
2.4.2. STOPWATCH [TIMER UP]
The Stopwatch function is entered by pressing the S button, when the time keeping display is shown. The text TIMEr UP at the bottom and the mode indicator (TIME) on the left side of the display indicate that you have entered the Stopwatch [TIMEr UP] function (Fig.2.6.). The stopwatch of the D3 lets you measure elapsed time, split times and the times of two runners. The range of the stopwatch is 9 hours, 59 minutes, 59.9 seconds (Fig. 2.7.). When the range is exceeded the
Fig. 2.7. The Stopwatch displays hours, minutes and seconds.
computer watch gives a beep and returns to the time keeping display automatically. Use the + and - buttons to operate the elapsed time measurement, split time measurement or the times of two runners as follows:
Diving with the D3 or performing data transfer will stop the stopwatch. However, it is possible to use stopwatch function when diving, if both the GAUGE and the FREE diving modes are disabled (set to OFF, see chapter 4.4.). In dive mode the stopwatch cannot be operated.
2.4.3 DOWNTIMER [TIMER D]
The downtimer function is entered by pressing the S button twice, when the time keeping display is shown. The text Timerd at the bottom and the mode indicator (TIME) on the left side of the display indicate that you have entered the Downtimer [TIMEr d] function (Fig.2.8). The watch shows the preset time set in the SET mode (See Chapter 4.3 Timer Settings). Use the + and buttons as in the [TIMEr Up] function. When the countdown nishes the watch gives three beeps and returns to showing the pre-set time (Fig. 2.9). If the downtimer has been set for a continuous countdown, the watch begins a new countdown after the previous one automatically. Diving with the D3 or performing data transfer will stop the downtimer. However, it is possible to use downtimer function normally, if the GAUGE and the FREE diving modes are disabled (set to OFF, see chapter 4.4.) In dive mode the downtimer cannot be operated.
Fig. 2.8. The Downtimer of the Stopwatch is indicated by the TIMEr d text and a mode indicator.
Fig. 2.9. The Downtimer counts down from a pre-set time and the DT mode indicator ashes.

3. DIVING WITH THE D3

In order to familiarize yourself with the menu based functions, Suunto recommends you use your Quick Reference Guide supplied with the D3 together with the information in the following chapters. This section contains instructions on how to operate the freediving computer and interpret its displays. You will nd that the D3 is easy to use and read. Each display shows only the data relevant to that specic diving situation. Chapter 3.1. Before Diving contains general instructions for all the dive computer modes. Chapter 3.2. Freediving information for using the D3 in freediving and Chapter 3.3. Gauge Diving for using the D3 to assist in scuba diving.
Fig. 3.1. Gauge Dive Mode selected.
Fig. 3.2. Free Dive Mode selected.
Fig. 3.3. Startup I. All segments shown.
3.1 BEFORE DIVING 3.1.1. ACTIVATION AND PRE-CHECKS
The instrument can be activated by pressing the M button or it will automatically activate the gauge diving or freediving computer mode according to the user selection, if submerged deeper than 0.6 m (2 ft). The chosen Dive Mode is indicated by the GAUGE (Fig 3.1.) or FREE (Fig 3.2.) texts and mode indicator on the right side of the display. If set to Gauge mode all display elements will turn on showing mostly gure 8s and graphical elements (Fig. 3.3.). After a few seconds the battery power indicator is shown and the backlight and the buzzer are activated (Fig. 3.4.a). Next, the screen will display the mode dependent Ready display conrming that the activation is complete (Fig. 3.5). If set to Free mode, the D3 will go directly to the ready display without the display and battery checks (Fig 3.6).
Fig. 3.4. Startup II. Battery Power Indicator.

DIVE TIME

Fig. 3.5. Startup III. Surface Mode (Gauge). Depth and dive time are zero. Pressing +/- button activates alternate display of maximum depth and current time.
At this time, perform your pre-check making sure that: the D3 operates and provides a complete display the low battery indicator is not on the instrument displays correct units the instrument displays correct temperature and depth (0.0 m [0 ft]) the buzzer beeps you have preset desired displays on the User Denable Display Field The D3 is now ready for diving. NOTE: The surface interval time does not run before the rst dive. After activation of the Dive Mode or after diving, the D3 will automatically switch to show the time keeping display within 5 minutes in Gauge Mode and 10 minutes in Free Mode to conserve the battery power, if you do not press any buttons.

F R EE F R EE

SURF TIME MAX
Fig. 3.6. Startup IV. Free mode. Depth and dive time are zero. Pressing +/- button activates altrernate displays.
3.1.2. BATTERY POWER INDICATOR AND LOW BATTERY WARNING
This dive computer has a unique graphic Battery Power Indicator designed to give you an advance
notice of impending need to change the battery. The Battery Power Indicator can be seen as the Dive Mode is activated. The electroluminescent backlight will be on during the battery check. The following Table and Figure show the various warning levels. TABLE 3.1. BATTERY POWER INDICATOR
Display BAT + 4 segments BAT + 3 segments Operation Normal, full battery. Normal, battery power is getting low or the temperature is low. Battery replacement is recommended if you are going to colder conditions or if you are planning to make a dive trip. Figure 3.4 a) b)
BAT + LOW + Battery power is low and the battery 2 segments + replacement is recommended. low battery symbol The battery symbol is displayed. The backlight is disabled. BAT + ERR Change the battery! 1 segment + Returns to the Time display. low battery symbol Activation and all functions are disabled.
Temperature or an internal oxidation of the battery affects the battery voltage. If the instrument is stored for a long period, the low battery warning may be displayed even though the battery has enough capacity. The low battery warn21
ing may also be displayed at low temperatures, even though the battery has enough capacity in warmer conditions. In these cases repeat the battery check procedure. After the battery check the Low Battery Warning is indicated by the battery symbol (Fig. 3.7.). 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: For safety reasons the backlight cannot be activated when the low battery warning is indicated by the battery symbol. The Battery Power Indicator is displayed only in Gauge Mode. The Low Battery symbol is displayed in both Free and Gauge Modes.
Fig. 3.7. Low Battery Warning. Battery symbol indicates that the battery is low and battery replacement is recommended.
3.1.3. USER DEFINABLE FUNCTIONS AND ALARMS
This D3 has several User Denable Functions and depth and time related alarms that you can set according to your personal preference. For example the D3 has a patented presetting system for the User Denable Display Field in the lower part of the display.
Fig. 3.8. Bookmark activation. An annotation, Bookmark, is placed in the prole memory during a dive by pressing the S button (Displayed with the Diver attention symbol.)

Fig. 3.12. Freediving Day History.
the deepest free dive made during that day the longest free dive in minutes and seconds in the center window and the total amount of free dives
The Day His Mode can be canceled by pressing the M or the S button.
Fig. 3.13. Day History display.
3.2.5. SURFACE INTERVAL AFTER A FREEDIVE
An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to be replaced by the SURFACE display, giving the following information (Fig. 3.14.): the surface time in minutes and seconds (separated by a colon), telling the duration of the present surface interval. After one hour the surface time is displayed in hours and minutes. the time of the most recent dive in minutes and seconds maximum depth of most recent dive in meters [ft]

SURF TIME

DIVE MAX TIME
Fig. 3.14. Surface display after Freedive. Center window showing surface time.
NOTE: Dive numbering in the Free Mode is different than in the Gauge Mode. It is based on free dives made during one day. The dive number is zeroed at midnight.
3.3. GAUGE DIVING 3.3.1 MAXIMUM OPERATING DEPTH PLANNER [MOD]
The MOD planner allows a diver using air, nitrox or trimix mixes to determine the maximum depth at which the gas is breathable within selected PO2 limits. It is possible at any time in the Gauge Surface Mode to enter the MOD planner, simply by pressing the S button. After showing the text MOD and the plan indicator (Fig. 3.15.), the display will show the Maximum Operating Depth (MOD) value corresponding to the selected O2% and PO2 levels (Fig 3.16.). To use the MOD planner: 1.In the Gauge Surface Mode, press the S button to select the MOD planner.

O2% PO2

Fig. 3.15. Maximum Operation Depth Planner. The Planning mode is indicated by the Mod text and mode indicators.
2. Wait two seconds until the MOD calculator activates automatically. The oxygen level starts to blink on the display (Fig. 3.16.). 3.Press the S to change the selection in the following sequence: ->O2% level ->PO2 level 4. While the O2% level is blinking, press the + and
Fig. 3.16. The Gauge Mod shows the Maximum Operating Depth and the corresponding O2% and PO2 values.
- buttons to increase and decrease the O2% level. The corresponding MOD is shown on the display. 5.While the PO2 level is selected, press the + and - to increase and decrease the PO2 level. Pressing S again returns to O2% selection. 6. After you have calculated the Maximum Operating Depth, exit the MOD planner by pressing the M button briey. Keeping the M button down turns on the light.
3.3.2. PRESETTING THE DISPLAYS IN THE GAUGE MODE
Preset with the - button in the lower left corner of the display (Fig. 3.5.): the maximum depth or the temperature. the dive time or the current time.

Preset with the + button in the lower right corner of the display (Fig. 3.5.):

3.3.3.

BASIC DIVE DATA
The dive computer will remain in the Surface mode at depths less than 1.2 m [4 feet]. At depths greater than 1.2 m the instrument will go into the Diving mode (Fig. 3.17.). During a dive, the following information will be displayed (Fig. 3.18.): in the upper window, your present depth in meters [ft]. in the center window, a dive timer which can be reset by the diver. the maximum depth during this dive in meters [ft], indicated as MAX or the temperature in C [F] in the lower left corner. the elapsed dive time in minutes, indicated as DIVE TIME or the current time, indicated as TIME in the lower right corner.
Fig. 3.17. Dive has just begun.

FR E E

Fig. 3.18. Diving display. Present depth is 10.2m. Dive timer shows 27 minutes and 18 seconds. Temperature and dive time are shown in the bottom window.

3.3.4.

ASCENT RATE INDICATOR
The ascent rate is shown graphically (Fig.3.19) along the left side of the display as follows: TABLE 3.2. ASCENT RATE INDICATOR
Ascent Rate Indicator No segments One segment Two segments Three segments Four segments Four segments, the SLOW segment, blinking depth reading, the STOP sign and an audible alarm The equivalent ascent speed Below 4 m/min [13 ft/min] 4 - 6 m/min [13 - 20 ft/min] 6 - 8 m/min [20 - 26 ft/min] 8 - 10 m/min [26 - 33 ft/min] 10 - 12 m/min [33 - 39 ft/min] Above 12 m/min [39 ft/min] or continuously above 10 m/min [33 ft/min]
ASCENT RATE (m/min) 10.12 8.10 6.<8 4.<6
Fig. 3.19. Ascent Rate Indicator. The segments indicate the speed of the ascent.
When the maximum allowed ascent rate is exceeded, the SLOW warning appears, alternating with the dive depth, indicating that the maximum ascent rate has been exceeded continuously or that the current ascent rate is signicantly above the allowed rate. The watch gives a single beep when the SLOW warning is shown.
Whenever the SLOW warning segment appears (Fig. 3.20.), you should immediately slow down your ascent.
NOTE: The Ascent Rate indicator is available in Gauge Mode only.
Fig. 3.20. Ascent Rate Indicator. Blinking SLOW and four segments are shown together with an audible alarm. Ascent Rate is more than 10 m/min [33ft/min].
Do not exceed the maximum ascent rate! Rapid ascents increase the risk of injury.
3.3.5. SURFACE INTERVAL AFTER A GAUGE DIVE
An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to be replaced by the alternating SURFACE displays, giving the following information (Fig. 3.21.): maximum depth of most recent dive in meters [ft] present depth in meters [ft] the surface time in hours and minutes (separated by a colon), telling the duration of the present surface interval

Fig. 3.21. Surface display. You have surfaced from a 44 minute dive, which had a maximum depth of 17.1m [ft].
Or in the lower display according the selection and mode: dive time of most recent dive in minutes labeled with DIVE TIME the current time labeled with TIME maximum depth labeled with MAX the current temperature with C for Centigrade [or F for Fahrenheit]

3.3.6 DIVE NUMBERING

Several repetitive dives in the Gauge mode are considered to belong to the same repetitive dive series when less than 48 hours of surface time has passed between the dives. Within each series, the dives are given individual numbers. The rst 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.

3.3.7.

FLYING AFTER DIVING
The Suunto D3 provides no calculations for no-y times. However, Divers Alert Network (DAN) recommends the following on no-ying 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 2400 m [8000 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 ight. Further, the Undersea and Hyperbaric Medical Society (UHMS) suggests divers using standard air tanks and exhibiting no symptoms of decompression illness wait 24 hours after their last dive to y in an aircraft with cabin pressure up to 2400 m [8000 ft]. The only two exceptions to this recommendation are: If a diver had less than 2 hours total accumulated dive time in the last 48 hours, then a 12 hour surface interval before ying is recommended. Following any dive that required a decompression stop, ying should be delayed for at least 24 hours, and if possible, for 48 hours. Suunto recommends that ying is avoided until the DAN and UHMS guidelines are met.
3.4. AUDIBLE AND VISUAL ALARMS
The Suunto D3 features audible and visual alarms to advise when important limits are approached or to acknowledge preset alarms. A short single beep occurs when: the dive computer automatically returns to the Time Mode. the maximum allowed ascent rate, 10 m/min [33 ft/min], is exceeded. SLOW warning will appear (Fig. 3.20.). The Ascent Rate indicator is available in Gauge Mode only. Continuous beeps and the backlight activated when:

Fig. 4.6. Daily Alarm Setting Mode.
4.2. DAILY ALARM SETTING [ALM]
You can set one daily alarm in the D3. When the daily -symbol blinks for 1 minute alarm activates, the and the alarm sounds for 24 seconds. The alarm is given at the preset time each day. Press any button to stop the audible alarm, after it has activated. To set the daily alarm: 1. In the Setting Mode, press S two (2) times to select the Daily alarm Setting Mode (Fig. 4.6.).
2. Wait two seconds until the Daily Alarm Setting Mode activates automatically. The time mode indicator appears and the alarm status [On/OFF] starts to blink on the display (Fig. 4.7.).
Fig. 4.7. Daily Alarm Setting Mode is activated.
3. Press S to change the selection in the following sequence: ->On/OFF status -> hours -> minutes 4. While the alarm status [On/OFF] is selected (blinking) press + or - to change the status. When the alarm status is On, the daily alarm indicator ( -symbol) in the bottom right corner of the display indicates that the alarm is on. 5. Set the other sections as follows: While any other digits (except alarm status) are selected (blinking), press + to increase the value or - to decrease it. Holding down either button starts the scrolling of the current selection. The 12-hour or 24-hour format of the alarm matches the format of the timekeeping display, which is selected in the Time Adjustment Mode (see chapter 4.1.). When using the 12-hour format of the alarm, take care to set the time correctly as morning (AM) or afternoon (PM). 6. After you have set the daily alarm, press the M button to save the settings and to return to the Setting Mode [SET].
4.3. TIMER SETTINGS [TIMER D]
In this mode you can set the countdown time for the downtimer. The downtimer also has an alarm repeat function for continuous downtimer alarm. To set the downtimer: 1.In the Setting Mode, press S three (3) times to select the Timer Setting Mode (Fig. 4.8.) 2.Wait two seconds until the Timer Setting Mode activates automatically. The SET mode and DT segments are displayed. 3.Press S to change the selection in the following sequence: -> minutes -> seconds -> alarm repeat When the minutes and seconds are selected (blinking), press - to decrease and + to increase the value. 4. After the downtimer time selection, the downtimer alarm repeat is selected. The alarm repeat function begins a new countdown after the previous one and signals every time when the downtimer begins a new countdown.
Fig. 4.8. Timer Setting Mode.
Fig. 4.9. Downtimer time and alarm repeat are selected.
While the enable/disable status [On/OFF] is selected (blinking) press + or - to change the status. 5. After setting the downtimer, press the M button to save the settings and return to setting mode.
4.4. DIVE MODE SETTINGS [DIVE]
In this mode you can select the type of dive mode to be used (Gauge or Free) or turn the dive modes OFF. If the dive modes are turned OFF, the dive computer functions are disabled, thus turning the D3 into a mere water resistant sportswatch. NOTE: If the DIVE Mode is disabled (set to OFF), the instrument will not activate the selected diving mode (Gauge, Free) when submerged. Turning the dive modes OFF enables the use of stopwatch and downtimer functions underwater.

Fig. 4.13. Dive Alarm Setting Mode.
Fig. 4.14. Dive Time Alarm. Center window displays less than 5 minutes dive time.
5. While the depth digits are selected (blinking), press + to increase the value or - to decrease it at intervals of 0.5 m [1 ft]. Holding down either button starts the scrolling of the depth value. The range of the depth is from 3.0 to 99.5 m [10 to 300 ft]. If set to 0, the alarm is disabled. 6. While the dive time minutes are selected (blinking), press + or - to change the time. If the time is less than ve (5) minutes, the dive time alarm seconds can also be set. This feature can be used for freediving (Fig. 4.11.). If the selected time is over 5 minutes no seconds are displayed (Fig. 4.15.) 7. After you have set the depth alarm, press the M button to save the settings and to return to the Setting Mode [SET].
Fig. 4.15. Dive Time Alarm. Display when more than 5 minutes dive time left.
4.6. UNIT ADJUSTMENT SETTINGS [AdJ]
In this setting mode also the desired units can be selected (metric, m/C or imperial, ft/F). To set the new Unit Adjustments: 1. In the Setting Mode [SET], press S six (6) times to select the Unit Adjustment Mode (Fig. 4.16.). 2. Wait two seconds until the Adjustment Mode activates automatically. The unit setting starts to blink on the display (Fig. 4.17.). 3. Press S to change the selection of units: While the units are blinking in the lower part of the display, press + or - to change units (Fig. 4.17.). After you have set the desired adjustments, press the M button to save the settings and to return to the Setting Mode [SET]).
Fig. 4.16. Unit Adjustment Mode.

Fig. 4.17. Adjustment.

Setting
5. MEMORY AND DATA TRANSFER [MEM]
The memory functions for the D3 include the combined Logbook and Dive Prole Memory, Dive History Memories for gauge and free dives and the Data Transfer and PC-Interface functions. NOTE: After diving in the gauge mode, the memory mode cannot be accessed until 5 minutes after the dive. Enter the Memory Mode [MEM] from other modes by pressing the M button. The text MEM at the bottom and the mode indicator on the left side of the display indicate the selected mode (Fig. 5.1.). If any button is not operated within 5 minutes after a function of the Memory Mode is selected, the D3 beeps and returns to the timekeeping display automatically.

Fig. 5.1. Memory Mode.

5.1. LOGBOOK AND DIVE PROFILE MEMORY [LOG]
This instrument has a sophisticated high capacity Logbook and Prole Memory. The data is recorded to the prole memory based on the sampling rate. The sampling rate in Gauge mode is adjustable to 10, 20, 30 and 60 s, and in Free mode 1 s. Dives shorter than the recording interval are not registered. To enter the Logbook Memory Mode: 1. In the Memory Mode [MEM], press S to select the Logbook Memory Mode (Fig. 5.2.). The LOG text appears at the bottom of the display to indicate the selected mode. 2. Wait two seconds until the Logbook Memory Mode activates automatically. For each dive there are four pages of logbook dive information. 3. Press S to switch the display between Logbook display I, II, III and IV.

Fig. 5.2. Logbook Memory Mode.
The data of the most recent dive is shown rst. The END text is displayed after the oldest and most recent dive. (Fig. 5.7.)
Fig. 5.3. Logbook, Page I.
Note that chronological sequence in the logbook is determined by the date, not by the dive number. The following information will be shown on four pages: Page I, main display (Fig. 5.3.) dive number in the dive series, Gauge dives are indicated by a D number and Freedives by an F number dive year, date and time maximum depth (NOTE: Due to lower resolution, the reading may differ from the maximum depth reading of the Dive History or surface display up to 0.3 m [1 ft].) total dive time after Gauge dives, blinking SLOW with the maximum depth alternating if the diver has violated the maximum ascent rate for FREE dives, the greatest depth, time at the deepest dive depth and total time of the dive
Fig. 5.4. Logbook, Page II.Main dive related data.

Page II (Fig. 5.4.)

Fig. 5.5. Logbook, Page III. Surface interval time, average depth.
Page III (Fig. 5.5.) average depth surface interval time before the dive temperature at the maximum depth the prole of the dive, automatic scrolling during which: blinking diver attention symbol when the user has pressed the S button for Bookmark blinking SLOW label when registered

Page IV (Fig. 5.6.)

Fig. 5.6. Logbook, Page IV. Prole of specic time.
The memory will retain approximately the last 36 hours of dive time in Gauge Mode and approximately 2 hours in freediving mode. After that, when new dives are added, the oldest dives are deleted. The contents of the memory will remain even when the
Fig. 5.7. Logbook, end of the memory. END text is displayed between the oldest and the most recent dive.
The data of the most recent dive is shown rst. Press - to call the information from the previous dive. Press the - button consecutively to move backward through the dives. Press + to move forward through the dives. It is possible to scroll trough the dives on all four pages. The END text is displayed after the oldest and the most recent dive (Fig. 5.7.).
battery is changed (assuming that the replacement has been done according to the instructions). DIVE PROFILE MEMORY [PRO] The scrolling of the prole will start automatically when the Prole/logbook page IV is entered (Fig. 5.6.). The dive time is displayed in sampling increments with each display being shown for about two seconds. The depths shown are the maximum values of each sampling interval. After the last depth gure of the selected prole, the D3 automatically returns to Display I of the same dive in the Logbook. If desired, the prole of the same dive can be recalled again following the above procedure. The scrolling of the prole can be stopped by pressing any button. Press S to stop the scrolling and to return to Display I of the same dive in the Logbook. Press + to stop the scrolling and to change to scrolling the next dive in the Logbook. Press - to stop the scrolling and to change to scrolling the previous dive in the Logbook. Press M to stop the scrolling and to return to the beginning of the Logbook. Press M two (2) times to exit the Logbook Memory [LOG] and enter the Memory Mode [MEM].

and sand particles have been ushed out. Check the display for possible moisture or water. DO NOT use the D3 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 uids that might cause damage do not test or use the D3 in pressurized air
6.3. WATER RESISTANCE INSPECTION
Water resistance of the unit must be checked after replacement of 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 nd moisture inside your advanced computer watch, 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 D3, if the instructions of this manual are not carefully followed. In case of a leak immediately bring the D3 to an authorized SUUNTO dealer or distributor.

6.4. BATTERY REPLACEMENT

NOTE: It is advisable to contact an authorized Suunto dealer 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.
Fig. 6.1.Battery Compartment Lid
All history and prole data, as well as the alarm settings, will remain in thedive computer memory after the battery change. However, the clock time and time alarm setting is lost. When working with the battery compartment, cleanliness is extremely important. Even the smallest dirt particles may cause a leakage when you dive. BATTERY KIT The battery kit includes a 3.0 V coin type lithium cell battery and a battery compartment lid with a lubricated O-ring. When handling the battery do not make contact with both of the poles at the same time. Do not touch the surfaces of the battery with your bare ngers.
BATTERY REPLACEMENT The battery is located in a separate battery com-partment on the back side of the instrument (Fig. 6.1.). To change the battery, follow the procedure below: 1. Thoroughly rinse and dry the computer. 2. Open the battery compartment lid by carefully but rmly turning it counterclockwise using a coin or a screwdriver. When turned the lid should rise from the compartment. Care should be taken not to damage any of the parts. Use a large enough coin/screwdriver in order not to damage the lid. 3. Remove the battery compartment lid with your ngers. Do not use sharp metal objects as they might damage the O-ring or the sealing surfaces. 4. Carefully remove the battery from underneath the battery retainer/contact. The battery can be removed by inserting a screwdriver under the battery and moving the battery with your nger. Be careful not to damage the electrical contacts or the sealing surface. Check for any traces of ooding or other damage. In case of a leak or any other damage, bring the dive computer to an authorized SUUNTO dealer or distributor for check and repair. 5. Remove the old O-ring from the battery compartment lid. 6. Check the condition of the old O-ring; a defective O-ring may indicate sealing or other problems. Dispose the old O-ring and battery compartment lid, even if they seem to be in good condition.

Dive time

EAN Enriched Air Nitrox

Abbreviation for enriched air nitrox. Oxygen-Nitrogen mix, normally with more than 21% oxygen.

Freediver Hypercapnia

A breath-holding diver whose only source of oxygen are his lungs lled with surface air. Increased amount of carbon dioxide in the blood. A diver who does not rest adequately between breath-hold dives will have elevated carbon dioxide levels. This can predispose hin to carbon dioxide toxicity or blackout. An increase in rate and/or volume of breathing. Carbon dioxide blood levels decrease with little corresponding increase in oxygen blood levels. If the diver engages in excessive hyperventilation, he may diminish his desire to breathe, long enough to become unconscious after a long period of apnea. A condition that occurs when a divers tissues do not receive enough oxygen. Freedivers become hypoxic when they hold their breath; they can eventually suffer blackout if they hold their breath too long. Abbreviation for Maximum Operating Depth. The maximum depth at which gas is breathable with selected PO2 limit.

Hyperventilation

Hypoxia

NITROX NOAA

In sports diving refers to any mix with a higher fraction of oxygen than standard air. United States National Oceanic and Atmospheric Administration. 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 time

Oxygen percentage or oxygen fraction in the breathing gas. Standard air has 21% oxygen. Limits the maximum depth to which the used Nitrox mixture can safely be 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 have the risk for immediate oxygen toxicity.

Oxygen partial pressure

PO2 Repetitive dive Residual nitrogen
Abbreviation for oxygen partial pressure. Any dive whose decompression time limits are affected by residual nitrogen absorbed during previous dives. The amount of excess nitrogen remaining in a diver after one or more dives.
Shallow - water blackout (SWB) An unconscious state divers experience when the brain becomes deprived of oxygen. SWB frequently happens without warning, causing death by subsequent drowning. Static apnea blackout Unconsciousness due to gradual oxygen depletion caused by holding ones breath too long. It can occur anywhere, particularly at the surface, and is not associated with depth or pressure changes. It commonly occurs in swimming pools at the surface or during long underwater endurance swims. SURF TIME Surface interval time Elapsed time between surfacing from a dive and beginning a descent for the subsequent repetitive dive. 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. Abbreviation for surface interval time.

FEATURES D9

OPERATING MODES Air Nitrox Gauge Watch DIGITAL COMPASS AIR INTEGRATION WIRELESS AIR INTEGRATION PC INTERFACE MAXIMUM DEPTH DISPLAY ASCENT RATE MONITOR /ALARM (optional) (incl.) 199 m (656 ft) 150 m (492 ft) 99 m (300 ft) 99 m (300 ft) (gauge mode only) FULL DECOMPRESSION DATA CONSUMED BOTTOM TIME GRAPH ASC TIME DISPLAY BACKLIGHT Up to 99 min Up to 99 min Up to 99 min Up to 99 min Up to 99 min Up to 99 min Up to 99 min phosphorescent display AUDIBLE ALARM MEMORY CAPACITY Profile (20s sampling rate) Logbook History PROFILE SAMPLING RATES DECOMPRESSION MODEL PERSONAL ADJUSTMENT ALTITUDE ADJUSTMENT SAFETY STOP DEEP STOP BUILT IN DIVE SIMULATOR DIVE PLANNER CALENDAR CLOCK with dual time STOPWATCH DIVE TIME IN SECONDS AND MINUTES TEMPERATURE DISPLAY MAX DEPTH ALARM DAILY ALARM BATTERY POWER INDICATOR USER REPLACABLE BATTERY SELECTABLE METRIC/ IMPERIAL UNITS NITROX FEATURES O2 % setting Up to 3 gases containing 21-99% Gas switching during dive Max PO2 adjustment CNS% + OTU calculation (OLF) 0.5-1.6 1.2-1.6 1.2-1.6 21-50% 21-50% Up to 3 gases containing 21-99% 0.5-1.6 1.2-1.6 1.2-1.6 1.2-1.6 21-50% 21-50% 21-50% In Gauge mode with dual time In Free / Gauge mode with dual time In Free mode with dual time In Free and Gauge modes In Gauge mode ~36 h ~36 h lifetime 1, 10, 20, 30, 60 s SUUNTO RGBM ~36 h ~36 h lifetime 2, 4, 10, 20, 30, 60 s * SUUNTO RGBM ~36 h ~36 h lifetime 20 s SCUBA 2 s Free * ~36 h ~36 h lifetime 1, 10, 20, 30, 60 s * ~36 h ~36 h lifetime 10, 20, 30, 60 s * ~36 h ~36 h lifetime 10, 20, 30, 60 s * SUUNTO RGBM ~36 h ~36 h lifetime 10, 20, 30, 60 s * SUUNTO RGBM SUUNTO RGBM ~50 h ~50 h lifetime 30 s (optional) 150 m (492 ft) 150 m (492 ft) 150 m (492 ft) 99 m (328 ft)

STINGER

Air Nitrox Free/Gauge Watch

MOSQUITO

Air Nitrox Free Watch

Free Gauge Watch

Air Nitrox Gauge

Air Nitrox

SUUNTO RGBM Bottom timer only SUUNTO RGBM
* In the Air and Nitrox modes, the default sampling rate is 20 s. You can select other sampling rates with the optional PC-interface unit and software. In Suunto Stinger Free/Gauge mode the default sampling rate is 4 s. You can reset this to other sampling rates (260 s.) without any additional equipment. In Suunto D3's Gauge mode the default sampling rate is 20 s. You can reset other sampling rates (10, 30 and 60 s.) without any additional equipment. The Free mode in Suunto D3 is fixed to 1 s.