Loading...SUUNTO D5
USER GUIDE
2019-06-19
Suunto D5
1. Safety................................................................................................................................................................ |
5 |
2. Getting started.............................................................................................................................................. |
9 |
2.1. Set Up................................................................................................................................................... |
9 |
2.2. Display - modes, views, and states............................................................................................. |
9 |
2.3. Icons................................................................................................................................................... |
10 |
2.4. Product compatibility...................................................................................................................... |
11 |
3. Features......................................................................................................................................................... |
12 |
3.1. Alarms, warnings and notifications............................................................................................. |
12 |
3.2. Algorithm lock.................................................................................................................................. |
13 |
3.3. Ascent rate........................................................................................................................................ |
14 |
3.4. Battery................................................................................................................................................ |
15 |
3.5. Bookmark.......................................................................................................................................... |
16 |
3.6. Clock.................................................................................................................................................. |
16 |
3.7. Compass............................................................................................................................................ |
16 |
3.7.1. Calibrating compass............................................................................................................ |
17 |
3.7.2. Setting declination.............................................................................................................. |
17 |
3.7.3. Locking the bearing............................................................................................................ |
18 |
3.8. Customizing with Suunto DM5.................................................................................................... |
19 |
3.9. Decompression algorithm............................................................................................................ |
19 |
3.9.1. Diver safety.......................................................................................................................... |
20 |
3.9.2. Altitude diving.................................................................................................................... |
20 |
3.9.3. Oxygen exposure............................................................................................................... |
21 |
3.10. Decompression dives................................................................................................................. |
22 |
3.10.1. Last stop depth.................................................................................................................. |
25 |
3.11. Device info...................................................................................................................................... |
25 |
3.12. Display............................................................................................................................................. |
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3.13. Dive history.................................................................................................................................... |
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3.14. Dive modes.................................................................................................................................... |
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3.14.1. Air / nitrox mode................................................................................................................ |
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3.14.2. Gauge mode...................................................................................................................... |
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3.14.3. Freedive mode.................................................................................................................. |
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3.15. Dive planner.................................................................................................................................. |
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3.16. Gas consumption......................................................................................................................... |
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3.17. Gas mixtures................................................................................................................................... |
32 |
3.18. Gas time.......................................................................................................................................... |
33 |
3.19. Idle and deep sleep..................................................................................................................... |
33 |
3.20. Language and unit system........................................................................................................ |
34 |
3.21. Logbook.......................................................................................................................................... |
34 |
3.22. Oxygen calculations................................................................................................................... |
35 |
3.23. Personal adjustments................................................................................................................. |
36 |
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3.24. Safety stops and deep stops.................................................................................................... |
37 |
3.25. Sample rate................................................................................................................................... |
38 |
3.26. Suunto app.................................................................................................................................... |
38 |
3.27. Suunto DM5................................................................................................................................... |
39 |
3.27.1. Synchronizing logs and settings................................................................................... |
39 |
3.27.2. Updating firmware........................................................................................................... |
39 |
3.28. Surface and no-fly time.............................................................................................................. |
40 |
3.29. Tank pressure............................................................................................................................... |
40 |
3.30. Timer................................................................................................................................................ |
41 |
3.31. Water contacts................................................................................................................................ |
41 |
4. Use................................................................................................................................................................. |
43 |
4.1. How to access device info........................................................................................................... |
43 |
4.2. How to change display brightness............................................................................................ |
43 |
4.3. How to set language and unit.................................................................................................... |
43 |
4.4. How to set time and date............................................................................................................. |
44 |
4.5. How to set the alarm clock.......................................................................................................... |
44 |
4.6. How to install and pair a Suunto Tank POD............................................................................ |
45 |
4.7. How to plan a dive using the Dive planner.............................................................................. |
47 |
4.8. How to customize dive modes with DM5................................................................................ |
48 |
4.9. How to enable gas consumption metering............................................................................ |
50 |
4.10. How to set depth notifications (freedive only)...................................................................... |
50 |
4.11. How to add bookmarks................................................................................................................ |
51 |
5. Care and support....................................................................................................................................... |
52 |
5.1. Handling guidelines....................................................................................................................... |
52 |
5.2. Installing scratch guard................................................................................................................ |
52 |
5.3. Quick release strap....................................................................................................................... |
53 |
5.4. Charging battery............................................................................................................................ |
53 |
5.5. Getting support.............................................................................................................................. |
54 |
5.6. Disposal and recyling................................................................................................................... |
54 |
6. Reference..................................................................................................................................................... |
55 |
6.1. Technical specifications................................................................................................................ |
55 |
6.2. Compliance..................................................................................................................................... |
57 |
6.2.1. EU radio directive............................................................................................................... |
57 |
6.2.2. EU Personal Protective Equipment .............................................................................. |
57 |
6.2.3. EU depth gauge standard............................................................................................... |
58 |
6.2.4. FCC / ISED regulatory notices....................................................................................... |
58 |
6.3. Trademark........................................................................................................................................ |
58 |
6.4. Patent notice................................................................................................................................... |
59 |
6.5. International Limited Warranty................................................................................................... |
59 |
6.6. Copyright......................................................................................................................................... |
60 |
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6.7. Menu................................................................................................................................................... |
61 |
6.8. Dive Terms........................................................................................................................................ |
61 |
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Suunto D5
1. Safety
Types of safety precautions
WARNING: - is used in connection with a procedure or situation that may result in serious injury or death.
CAUTION: - is used in connection with a procedure or situation that will result in damage to the product.
NOTE: - is used to emphasize important information.
TIP: - is used for extra tips on how to utilize the features and functions of the device.
WARNING: all computers experience failures. It is possible that this device may suddenly fail to provide accurate information during your dive. Always use a backup dive device and only dive with a buddy. Only divers trained in proper use of diving equipment should use this dive device! YOU MUST READ the leaflet and user guide for your dive computer before use. Failure to do so may lead to improper use, serious injury or death.
Before you dive
Make sure that you fully understand the use, displays and limitations of your dive instruments. If you have any questions about this manual or dive instrument, contact your Suunto dealer before diving. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
Before leaving on a dive trip,inspect your dive computer thoroughly to make sure everything is functioning properly.
At the dive site, perform your manual pre-checks on each device before entering the water.
Dive Computer Pre-check
Ensure that:
1.Suunto D5 is in the correct dive mode and the display is working as expected.
2.Altitude setting is correct.
3.Personal setting is correct.
4.Deep stops are set correctly.
5.Unit system is correct.
6.Compass is calibrated. Start the calibration manually in the menu under General » Compass » Calibrate to also confirm that the dive computer audible sounds are working. After successful calibration, you should hear a sound.
7.The battery is fully charged.
8.All primary and backup gauges for time, pressure and depth, both digital and mechanical, are showing correct, consistent readings.
9.If Suunto Tank PODs are in use, check that Suunto Tank POD is properly installed and the tank valve is open. Please see the Suunto Tank POD User Guide for detailed information and proper use.
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10.If Suunto Tank PODs are in use, check that connections are working and gas selections are correct.
NOTE: For Suunto Tank POD related information please see the instructions provided with the product.
Safety precautions
WARNING: ONLY TRAINED DIVERS SHOULD USE A DIVE COMPUTER! InsuÚcient training for any kind of diving, including freediving, may cause a diver to commit errors, such as incorrect use of gas mixtures or improper decompression, that may lead to serious injury or death.
WARNING: You must read the printed quick guide and online user guide for your dive computer. Failure to do so may lead to improper use, serious injury or death.
WARNING: THERE IS ALWAYS A RISK OF DECOMPRESSION SICKNESS (DCS) FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER. NO PROCEDURE, DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE POSSIBILITY OF DCS OR OXYGEN TOXICITY! An individual’s physiological makeup can vary from day to day. The dive computer cannot account for these variations. You are strongly advised to remain well within the exposure limits provided by the instrument to minimize the risk of DCS. As an added measure of safety, you should consult a physician regarding your fitness before diving.
WARNING: If you have a pacemaker, we recommend you do not scuba dive. Scuba diving creates physical stresses on the body which may not be suitable for pacemakers.
WARNING: If you have a pacemaker, consult a doctor before using this device. The inductive frequency used by the device may interfere with pacemakers.
WARNING: Allergic reactions or skin irritations may occur when product is in contact with skin, even though our products comply with industry standards. In such event, stop use immediately and consult a doctor.
WARNING: Not for professional use! Suunto dive computers are intended for recreational use only. The demands of commercial or professional diving may expose the diver to depths and conditions that tend to increase the risk of decompression sickness (DCS). Therefore, Suunto strongly recommends that the device not be used for any commercial or professional diving activities.
WARNING: USE BACKUP INSTRUMENTS! Ensure that you use backup instrumentation, including a depth gauge, submersible pressure gauge, timer or watch, and have access to decompression tables whenever diving with a dive computer.
WARNING: For safety reasons, you should never dive alone. Dive with a designated buddy. You should also stay with others for an extended time after a dive as the onset of possible DCS may be delayed or triggered by surface activities.
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WARNING: PERFORM PRE-CHECKS! Always check that your dive computer is functioning properly and has the correct settings before diving. Check that the display is working, the battery level is OK, tank pressure is correct, and so forth.
WARNING: Check your dive computer regularly during a dive. If you believe or conclude that there is any problem with any computer function, abort the dive immediately and safely return to the surface. Call Suunto Customer Support and return your computer to an authorized Suunto Service Center for inspection.
WARNING: THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED BETWEEN USERS WHILE IT IS IN OPERATION! Its information will not apply to someone who has not been wearing it throughout a dive, or sequence of repetitive dives. Its dive profiles must match that of the user. If it is left on the surface during any dive, the dive computer will give inaccurate information for subsequent dives. No dive computer can take into account dives made without the computer. Thus, any diving activity up to four days prior to initial use of the computer may cause misleading information and must be avoided.
WARNING: DO NOT EXPOSE ANY PART OF YOUR DIVE COMPUTER TO ANY GAS MIX CONTAINING MORE THAN 40% OXYGEN! Enriched air with greater oxygen content presents a risk of fire or explosion and serious injury or death.
WARNING: DO NOT DIVE WITH A GAS IF YOU HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE ANALYZED VALUE INTO YOUR DIVE COMPUTER! Failure to verify tank contents and enter the appropriate gas values where applicable into your dive computer will result in incorrect dive planning information.
WARNING: Using a dive planner software such as in Suunto DM5 is not a substitute for proper dive training. Diving with mixed gases has dangers that are not familiar to divers diving with air. To dive with Triox, Heliox and Nitrox or all of them, divers must have specialized training for the type of diving they are doing.
WARNING: Do not use Suunto USB Cable in areas where flammable gases are present. Doing so may cause an explosion.
WARNING: Do not disassemble or remodel Suunto USB Cable in any way. Doing so may cause an electric shock or fire.
WARNING: Do not use Suunto USB cable if cable or parts are damaged.
WARNING: You must only charge your device using USB adapters that comply with the IEC 60950-1 standard for limited power supply. Non-compliant adapters are a fire hazard and a risk to personal injury and might damage your Suunto device.
CAUTION: DO NOT allow the connector pins of the USB cable to touch any conductive surface. This may short circuit the cable, making it unusable.
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NOTE: Make sure your Suunto dive computer always has the latest software with updates and improvements. Check before every dive trip from www.suunto.com/support, if Suunto has released a new software update to your device. When it is available, you must install it before diving. Updates are made available to improve your user experience and are part of Suunto´s philosophy of continuous product development and improvement.
Emergency ascents
In the unlikely event that the dive computer malfunctions during a dive, follow the emergency procedures provided by your certified dive training agency to immediately and safely ascend.
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2. Getting started
2.1. Set Up
To get the most out of your Suunto D5, use some time to customize features and dive views. Make absolutely sure that you know your computer and have it set up as you want before getting into the water.
To get started:
1.Wake up the device by connecting the USB cable to a PC/Mac or a power source. Use a USB port of 5 Vdc, 0.5A.
2.Follow the startup wizard to set up the device. When ready, the device goes to surface state.
3. Fully charge before first dive.
The startup wizard guides you through:
•Language
•Units
•Time format (12h/24h)
•Date format (dd.mm / mm.dd)
•Time and date
•Connecting with Suunto app (optional)
2.2. Display - modes, views, and states
Your Suunto D5 has three buttons that have diÒerent functions in diÒerent views. Short pressing or long pressing them gets you to diÒerent functionalities.
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Suunto D5
Suunto D5 has three main dive modes: Air / Nitrox, Gauge and Free.
Press and hold the middle button to enter Main menu and select the appropriate mode for your dive under Dive settings » Mode. Select O if you want use Suunto D5 as a regular watch. In this case all dive functionalities are switched oÒ.
Suunto D5 automatically restarts to change mode.
DiÒerent dive modes have diÒerent views. Some views are available by default, some of them can be made available through customization in DM5. See 3.8. Customizing with Suunto DM5.
For more detailed information on the views availabe in the diÒerent modes, see 3.14. Dive modes.
Suunto D5 automatically switches between surface and dive state. If you are more than 1.2 m (4 ft) below the water level and water contact is on, the dive state is activated.
In a default dive display, you see the following information:
The switch window has diferrent information that can be changed by short pressing the lower button.
For a complete map of the available menu items within your Suunto D5, see 6.7. Menu.
2.3. Icons
Suunto D5 uses the following icons:
Water contact
Device is functioning abnormally (e.g. water contact is not working as expected)
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No-fly time
Surface (interval) time
Bluetooth
Airplane mode
Alarm clock
Battery status (for device: ok, charging, low, low-recharge needed; for Tank POD: low)
Battery level - number indicates remaining diving time
Vibration alarm on
Sound and vibration alarm on
2.4. Product compatibility
Suunto D5 can be used together with Suunto Tank POD for wireless transmission of tank pressure to the dive computer. Multiple Tank PODs can be paired with the dive computer.
This dive computer can also be paired with the Suunto app over Bluetooth. With the app you can transfer dive logs to Suunto app.
You may also connect this dive computer to a PC or Mac with the supplied USB cable and use Suunto DM5 to modify device settings, plan dives, as well as update the dive computer software when an update is available.
Do not use this dive computer with any unauthorized accessories or attempt to connect wirelessly with mobile apps or equipment not authorized or o€cially supported by Suunto.
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3.Features
3.1.Alarms, warnings and notifications
Suunto D5 has color-coded alarms, warnings and notifications. They are shown prominently on the display with an audible alarm (if tones are on). Alarms are always red. Warnings may be red or yellow. Notifications are always yellow.
Suunto D5 has vibration alarm. The vibration can be turned on or oÒ for dive alarms, notifications and warnings.
Alarms are critical events that always require immediate action. When an alarm situation comes back to normal, the alarm will stop automatically.
Alarm |
Explanation |
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Ascent speed exceeds safe speed of 10 m (33 ft) per |
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minute for five seconds or more. |
Decompression ceiling broken by more than 0.6 m (2 ft) on a decompression dive. Immediately descend back below ceiling depth and continue to ascend normally.
Partial pressure of oxygen exceeds safe level (>1.6). Immediately ascend or change to a gas with lower oxygen percentage.
Warnings alert you to events that can impact your health and safety if you do not take action. Acknowledge the warning by pressing any button.
Warning |
Explanation |
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CNS 100% |
Central nervous system toxicity level at 100% limit |
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OTU 300 |
Recommended daily limit for Oxygen tolerance unit |
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reached |
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Depth |
Depth exceeds your depth alarm limit |
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Dive time |
Dive time exceeds your dive time alarm limit |
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Warning |
Explanation |
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Gas time |
Gas time is below your gas time alarm limit, or tank |
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pressure is below 35 bar (~510psi), in which case gas |
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time is zero. |
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Safety stop broken |
Mandatory safety stop ceiling broken by more than 0.6 |
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m (2 ft) |
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Tank pressure |
Tank pressure is below your tank pressure alarm limit. |
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There is a built in 50-bar alarm that cannot be changed. |
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In addition to it there is a configurable tank pressure |
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alarm, you can set to any value and your dive computer |
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also shows an alarm when that value and 50 bar |
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pressures are reached. The tank pressure number is |
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forced onto the display and turns yellow after the value |
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you set and red after 50 bar. |
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Notifications indicate events that require preventive actions. Acknowledge the notification by pressing any button.
Noti®cation |
Explanation |
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CNS 80% |
Central nervous system toxicity level at 80% limit |
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OTU 250 |
Approximately 80% of recommended daily limit for OTU |
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reached |
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Change gas |
On multi-gas dive when ascending, it is safe to switch to |
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next available gas for optimum decompression profile |
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Battery low |
Approximately three hours of dive time left |
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Recharge needed |
Approximately two hours of battery time left; re-charging |
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required before next dive |
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Tank POD low battery |
Tank POD battery life low; battery change required |
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3.2. Algorithm lock
Breaking the decompression ceiling
When you ascend above the ceiling by more than 0.6 m (2 ft), the ceiling parameter turns red, a red arrow pointing down appears, and an audio alarm is generated.
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In such event, you should descend below the ceiling level to continue the decompression. If you fail to do so within three (3) minutes, Suunto D5 locks the algorithm calculation and displays Locked instead, as shown below. Note that the ceiling value is no longer present.
Algorithm locked
Suunto Fused™ RGBM 2 algorithm is locked for 48 hours if you omit to take decompression stops for longer than three (3) minutes. When the algorithm is locked, no algorithm information is available and Locked is shown instead. Locking the algorithm is a safety feature, highlighting that the algorithm information is no longer valid.
Algorithm locked in Timer view:
Algorithm locked in No Deco view:
In this state, you significantly increase your risk of decompression sickness (DCS). Decompression information is not available for the next 48 hours after surfacing.
It is possible to dive with the device when the algorithm is locked, but instead of the decompression information, Locked is shown. Diving while the algorithm is locked resets the algorithm lock time back to 48 hours when you surface.
3.3. Ascent rate
During a dive, the bar on the left indicates ascent rate. One bar step corresponds to 2 m (6.6 ft) per minute.
The bar is also color coded:
•Green indicates ascent rate is ok, less than 8 m (26.2 ft) per minute
•Yellow indicates ascent rate is moderately high, 8-10 m (26-33 ft) per minute
•Red indicates ascent rate is too high, over 10 m (33 ft) per minute
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When maximum allowed ascent rate is exceeded for five seconds, an alarm is generated. Ascent rate violations result in longer safety stop times and mandatory safety stops.
WARNING: DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase the risk of injury. You should always make the mandatory and recommended safety stops after you have exceeded the maximum recommended ascent rate. If this mandatory safety stop is not completed the decompression model will penalize your next dive(s).
3.4. Battery
Suunto D5 has a rechargeable lithium-ion battery. Charge the battery by connecting Suunto D5 to a power source with the included USB cable. As a power source use a USB port of 5Vdc, 0.5A.
The battery icon in the bottom of the display shows the battery status.
Icon |
Explanation |
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Battery level is OK. |
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Battery level is low. Less than 3 hrs left. |
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Battery level is low. Less than 2 hrs left. Recharge needed. |
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Battery is charging. |
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For Suunto D5 the battery and charging notifications are as follows:
When USB is connected for charging and every time you press a button during that time, the following pop-up notification appears:
When charging from a wall outlet you will see the following screen:
In watch view, dive views (but not during dives), and during dives a yellow 'Battery low' popup appears (see below) when there is less than 3 (three) hours left from battery time. If you press any button the pop-up disappears.
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When the time left decreases to 2 (two) hours a 'Recharge needed' red pop-up notification appears. The red pop-up will stay on the screen on top of everything else and you cannot make it disappear until the device is charged or you change to time view. In case of scuba diving, when the charge level drops below 2 (two) hours, you cannot start a dive with Suunto D5. For freediving the limit is 30 minutes.
During a dive the red battery icon (see above) is displayed. The notification pop-up comes only on the surface so it will not cover information on the display during a dive.
When the battery runs empty, a charging symbol on a blank screen notifies you to recharge your Suunto D5.
3.5. Bookmark
Adding a bookmark (timestamp) to an active log is really easy in Suunto D5. See 4.11. How to add bookmarks for the procedure.
3.6. Clock
Suunto D5's time and date settings are found under Device settings.
Time and date formats are found under Units & formats. For setting, see 4.4. How to set time and date.
A daily alarm can be activated under Main menu » Alarm clock. For more information, see
4.5. How to set the alarm clock.
Sound and vibration are always on by default. This setting cannot be changed for the alarm clock.
3.7. Compass
By repeatedly short pressing the middle button brings up the compass. First calibrate the compass, for more information see 3.7.1. Calibrating compass.
The information on the display depends on which mode you are in.
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In Air / Nitrox mode, you will see the following information in compass view:
In the switch window, you see the heading in numeric format.
In the Compass menu you can turn the bearing on or oÒ, calibrate the compass, and set declination.
3.7.1. Calibrating compass
When you first start using Suunto D5, and after each charging, the compass needs to be calibrated and it is required to do so to activate it. Suunto D5 displays the calibration icon when you enter the compass view.
During the calibration process, the compass adjusts itself to the surrounding magnetic field.
Because of changes in the surrounding magnetic field, it is recommended to re-calibrate the compass before each dive.
To manually start calibration:
1.Take oÒ your Suunto D5.
2.Keep the middle button pressed to enter the menu.
3.Browse to General / Compass.
4.Press the middle button to enter Compass.
5.Scroll up or down to select Calibrate.
6.Start calibrating the device by trying to move it around the xyz axels of the coordinate system (like you were drawing a small circle) so that the magnetic field is as stable as possible during the calibration. To achieve this, try to keep Suunto D5 in the same location and do not move it around using large movements.
7.Repeat the rotation as long as the compass calibration is successful.
8.A sound indicates when the calibration succeeded, and the screen goes back to Compass menu.
NOTE: If the calibration fails several times in a row, you may be in an area with strong sources of magnetism, such as large metal objects. Move to another location and try to calibrate the compass again.
3.7.2. Setting declination
You should always adjust your compass declination for the area where you are diving to get accurate heading readings. Check the local declination from a trusted source and set the value in Suunto D5.
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To set declination:
1.Keep the middle button pressed to enter the menu.
2.Browse to General / Compass.
3.Press the middle button to enter Compass.
4.Press the middle button again to enter Declination.
5.Scroll up/down to set the angle of declination: Starting from 0.0º scroll up towards East or down towards West declination. To turn declination oÒ, set declination angle to 0.0º.
6.Press middle button to save changes and go back to the Compass menu.
7.Keep the middle button pressed to exit.
3.7.3. Locking the bearing
A bearing is the angle between north and your target. In simple terms, it is the direction you want to travel. Your heading, on the other hand, is your actual direction of travel.
You can set a bearing lock to help you orientate yourself underwater and ensure you maintain your direction of travel. For example, you can set a bearing lock for the direction to the reef before leaving the boat.
You can reset the bearing lock at any time, but you can only clear a bearing lock while at the surface.
To lock the bearing:
1.Press the middle button to change to compass view.
2.Hold your Suunto D5 in level in front of you, with the top pointing in the direction to your target.
3.Keep the lower button pressed until you see the Bearing locked notification.
After you locked the bearing, you can see yellow bars to indicate the angle where you locked the bearing:
When the bearing is at 0°, no arrows are shown beside the value, as above. When the bearing is at 180°, two yellow arrows are shown beside the value:
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One yellow arrow indicates the direction you need to turn:
If you want to set a new bearing lock, just repeat the same procedure above. Each bearing lock is recorded in your dive log with a time stamp.
To clear the bearing lock from your compass view, you need to return to the surface. To clear a bearing lock:
1.While in surface state, keep the middle button pressed to enter the main menu.
2.Scroll to General with the upper or lower buttons and press the middle button.
3.Press the middle button to enter Compass.
4.Select Clear bearing with the middle button.
3.8. Customizing with Suunto DM5
You can customize Suunto D5 views and features with Suunto DM5. Create up to 10 diÒerent dive modes with up to five custom views each.
NOTE: When creating or modifying dive modes, you need to synchronize the changes with your Suunto D5 before disconnecting the USB cable to save the changes to your device.
Customization can be done in four categories:
•Dive mode name
•Dive algorithm
•Gas settings
•Customize views
Dive mode name has a 15-character limit, you can select Suunto Fused™ RGBM 2 or no algorithm for Dive algorithm.
For Gas settings, the GAS menu content can be configured. For each dive mode, you can create up to five custom views.
For more details, see 4.8. How to customize dive modes with DM5.
3.9. Decompression algorithm
Suunto's decompression model development originates from the 1980s when Suunto implemented Bühlmann's model based on M-values in Suunto SME. Since then research and development has been ongoing with the help of both external and internal experts.
In the late 1990s, Suunto implemented Dr. Bruce Wienke's RGBM (Reduced Gradient Bubble Model) to work with the earlier M-value based model. The first commercial products with the feature were the iconic Suunto Vyper and Suunto Stinger. With these products the improvement of diver safety was significant as they addressed a number of diving circumstances outside the range of dissolved-gas-only models by:
•Monitoring continuous multiday diving
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•Computing closely spaced repetitive diving
•Reacting to a dive deeper than the previous dive
•Adapting to rapid ascents which produce high microbubble (silent-bubble) build-up
•Incorporating consistency with real physical laws for gas kinetics
The Suunto Fused™ RGBM 2 combines and improves widely respected Suunto RGBM and Suunto Fused™ RGBM decompression models developed by Suunto together with Dr. Bruce Wienke. (Suunto dive algorithms are a culmination of expertise and knowledge accumulated over decades of development, testing and thousands upon thousands of dives.)
In Suunto Fused™ RGBM 2 the tissue half-times are derived from Wienke’s FullRGBM where human body is modeled by fifteen diÒerent tissue groups. FullRGBM can utilize these additional tissues and model the on-gassing and oÒ-gassing more accurately. The amounts of nitrogen and helium on-gassing and oÒ-gassing in the tissues are calculated independently from each other.
The Fused™ RGBM 2 supports open-circuit and closed-circuit diving up to a depth of 150 meters. Compared to previous algorithms, Fused™ RGBM 2 is less conservative on deep air dives, allowing shorter ascent times. In addition, the algorithm no longer requires tissues to be completely free of residual gases when calculating no-fly times, thereby reducing the required time between your last dive and flying.
The advantage of Suunto Fused™ RGBM 2 is additional safety through its ability to adapt to a wide variety of situations. For recreational divers it may oÒer slightly longer nodeco times, depending on the chosen personal setting. For open-circuit technical divers it allows use of gas mixes with helium - on deeper and longer dives helium based gas mixes provide shorter ascent times. And finally, for rebreather divers the Suunto Fused™ RGBM 2 algorithm gives the perfect tool to be used as a non-monitoring, set point dive computer.
NOTE: Suunto D5 does not have Trimix diving or CCR support.
3.9.1. Diver safety
Because any decompression model is purely theoretical and does not monitor the actual body of a diver, no decompression model can guarantee the absence of DCS. Experimentally it has been shown that the body adapts to decompression to some degree when diving is constant and frequent. Two personal adjustment settings (P-1 and P-2) are available for divers who dive constantly and are ready to accept greater personal risk.
CAUTION: Always use the same personal and altitude adjustment settings for the actual dive and for the planning. Increasing the personal adjustment setting from the planned setting as well as increasing the altitude adjustment setting can lead to longer decompression times deeper and thus to larger required gas volume. You can run out of breathing gas underwater if the personal adjustment setting has been changed after dive planning.
3.9.2. Altitude diving
WARNING: Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body. It is recommended that you acclimatize to the new altitude before diving.
The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, you will have additional nitrogen in your body, compared to the equilibrium
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