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COBRA 3
User Manual [it]
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Quick Start
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User Manual [es]
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User Manual [nl]
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Instruction Manual [es]
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User Manual
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User Manual
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Operation Manual
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User Manual [sv]
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Suunto Cobra 3 Operation Manual

COBRA3
USER’S GUIDE
en
Time Tank pressure
1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS .. . . . . . .... . . . . . . 7
2. WARNINGS, CAUTIONS, AND NOTES . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . . 8
3. SUUNTO USER INTERFACE . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . 17
3.1. Navigating in the menus .. . . . . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . 17
4. GETTING STARTED .. . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . 21
4.1. TIME mode settings . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . 21
4.1.1. Setting the alarm . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . 22
4.1.2. Setting the time .... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . 22
4.1.3. Setting the date . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . 23
4.1.4. Setting the backlight ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . 23
4.1.5. Setting the tones ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . 24
4.3. Learning how to use your compass ... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . 25
4.3.1. Compass display . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . 26
4.3.2. Locking a bearing ...... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . 27
4.3.3. Compass settings .. . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . . 28
5. BEFORE DIVING . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . ... 32
5.3. Dive computer limitations .. . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . 34
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5.6.1. Connecting Suunto Cobra3 to a regulator . . . . ..... . . . . . . . . .... . . . . . . . . ... 38
5.7. DIVE mode settings .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . 39
5.7.1. Setting the depth alarm .. .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . 40
5.7.2. Setting the dive-time alarm .... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . 40
5.7.3. Setting the nitrox values .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . 41
5.7.4. Setting the personal/altitude adjustments . . . . . .... . . . . . . . . ..... . . . . . . . . .. 42
5.7.5. Setting the sample rate . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . 42
5.7.6. Setting the Safety Stops/deep stops . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... 43
5.7.7. Setting the RGBM values . . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ... 43
5.7.8. Setting the units . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . 44
5.7.9. Setting the tank pressure alarm .. . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . 44
5.8. Activation and pre-checks .. . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . 45
5.8.1. Accessing DIVE mode .... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... 45
5.8.2. DIVE mode activation . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . .... 46
5.8.3. Battery power indication . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . 47
5.8.4. Diving at altitude . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . 48
5.8.5. Personal adjustments .. ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .. 49
5.9.1. Recommended Safety Stops .. . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . 52
5.9.2. Mandatory Safety Stops . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . 53
6. DIVING .. . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ... 56
6.1.1. Basic dive data .. . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . 56
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6.1.2. Bookmark ...... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . ... 58
6.1.3. Tank pressure data . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . .... 59
6.1.4. Ascent rate indicator . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . ... 61
6.1.5. Safety Stops . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . 62
6.1.6. Decompression dives . . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . 62
6.2. Diving in NITROX mode (DIVE Nitrox) . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . 67
6.2.1. Before diving in the NITROX mode ... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ... 67
6.2.2. Oxygen displays .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . 69
6.2.3. Oxygen limit fraction (OLF%) .. . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . 70
6.2.4. Gas change and multiple breathing gas mixes . . . . .... . . . . . . . . ..... . . . . . 71
6.3. Diving in the GAUGE mode (DIVE Gauge) .... . . . . . . . . ..... . . . . . . . . .... . . . . . . 72
7. AFTER DIVING .... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . 74
7.3. Repetitive dive planning . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... 76
7.4. Flying after diving . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . 76
7.5.1. DIVE PLANNING mode (PLAN NoDec) . . . . . . . ..... . . . . . . . . ..... . . . . . . . . . 78
7.5.2. Simulation Mode (PLAN Simulator) . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . 80
7.6.1. Dive logbook (MEM Logbook) . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... 82
7.6.2. Dive history (MEM History) . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . 84
7.8. Movescount . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . 87
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8. CARE AND MAINTENANCE OF MY SUUNTO DIVING COMPUTER . . . . ..... . 88
9. BATTERY REPLACEMENT .. . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . 91
9.3. Replacing the battery . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . 92
10. TECHNICAL DATA . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . .. 95
10.1. Technical specifications .. . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . 95
10.2. RGBM ... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . .. 98
10.2.1. Suunto RGBM adaptive decompression . . . . .... . . . . . . . . ..... . . . . . . . . ... 99
10.2.2. No-decompression limits for air . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . 100
10.2.3. Altitude diving .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .... . . . . . . . . ..... . . . . . . 102
10.3. Oxygen exposure . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . 103
11. INTELLECTUAL PROPERTY .. . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . 104
11.1. Trademark . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . 104
11.2. Copyright . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . 104
11.3. Patent notice ...... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . . .. 104
12. DISCLAIMERS .... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . 105
12.1. CE .. . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . 105
12.2. EN 13319 .. . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . 105
12.3. EN 250 / FIOH . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . 105
13. SUUNTO LIMITED WARRANTY . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . 106
14. DISPOSAL OF THE DEVICE . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . ..... . . . . . 108
GLOSSARY .. . . . . . . . ..... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . . . . . . . . .... . . . . . . . . ..... . 109
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1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS
Suunto Cobra3 wristop dive computer is designed to help you get the most out of your diving. By reading this manual and becoming familiar with the functions of your dive computer, you can begin a new era in your diving.
With integrated digital compass, air integration, and gas switching, Suunto Cobra3 simplifies your diving experience because all the information you need relating to depth, time, tank pressure, decompression status, and direction is available on one easy-to-read screen.
The Suunto Cobra3 User's Guide contains vitally important information which enables you to become familiar with your Suunto wristop dive computer. To understand the use, displays, and limitations of the instrument before using it, please read this user's guide carefully, and save it for further reference. Note also that a glossary is included at the back of the user's guide to help you understand dive-specific terminology.
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2. WARNINGS, CAUTIONS, AND NOTES
Throughout this user's guide, 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 may result in serious injury or death
CAUTION
NOTE
Before you go on to read the user's guide itself, it is extremely important that you read the following warnings. These warnings are intended to maximize your safety while using Suunto Cobra3 and must not be ignored.
WARNING
WARNING
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is used in connection with a procedure or situation that will result in damage to the device
is used to emphasize important information
YOU MUST READ the leaflet and user guide for your dive com­puter. Failure to do so may lead to improper use, serious injury or death.
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 illness (DCI). Therefore, Suunto strongly recommends that the device not be used for any commercial or professional diving activities.
WARNING
WARNING
ONLY DIVERS TRAINED IN 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 a diver to commit errors that may lead to serious injury or death.
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 TABLEWILL 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 measure of safety, you should consult a physician regarding your fitness before diving.
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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 PO2OF 1.4 BAR! Exposure to greater depths increases the risk of oxygen toxicity and decom­pression illness.
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WARNING
WARNING
WARNING
DIVES WITH REQUIRED 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.
USE BACK-UP INSTRUMENTS! Ensure 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 the dive computer.
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, the device has not run out of battery power, and that the oxygen, altitude, personal, RGBM adjustments, and Safety/Deep Stop are correct.
WARNING
YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COM­PUTER COUNTS DOWN THE NO-FLY TIME. ALWAYS ACTIV­ATE THE COMPUTER TO CHECK THE REMAINING NO-FLY TIME PRIOR TO FLYING! Flying or traveling to a higher altitude within the no-fly time can greatly increase the risk of DCI. Review the recommendations given by Divers Alert Network (DAN). There can never be a flying after diving rule that is guaranteed to com­pletely prevent decompression illness!
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.
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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 there is a desire to adjust the computer to provide more conservative calculations, use the personal adjust­ment feature to affect decompression calculations or reduce the PO2setting to affect oxygen exposure according to the entered O2% and PO2values.
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WARNING
SET THE CORRECT ALTITUDE ADJUSTMENT MODE! When diving at altitudes greater than 300 m/1000 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 3000 m/10000 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
SET THE CORRECT PERSONAL ADJUSTMENT MODE! 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.
WARNING
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).
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/min / 33 ft/min or
• make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to
reach the surface.
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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.
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WARNING
WARNING
WARNING
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE ANALYSIS 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.
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 cylinder contents and enter the appropriate gas values where applicable into your dive computer will result in incorrect dive planning inform­ation.
Diving with gas mixtures 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.
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.
WARNING
WARNING
WARNING
WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity, injury, or death
Suunto also recommends that you receive training in Free diving techniques and physiology before conducting breath hold 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.
Using the Suunto Dive Planner software 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 trimix, triox, heliox and nitrox or all of them, divers must have specialized training for the type of diving they are doing.
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WARNING
Always use realistic SAC rates and conservative turn pressures during dive planning. Overly optimistic or erroneous gas planning can result in the exhaustion of breathing gas during decompres­sion or in a cave or a wreck.
WARNING
NOTE
In GAUGE mode the no-fly time is always 48 hours.
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ENSURE THE WATER RESISTANCE OF THE DEVICE! Moisture inside the device or battery compartment will seriously damage the unit. Only an authorized SUUNTO dealer or distributor should do service activities.
It is not possible to change between AIR, NITROX and GAUGE modes before the instrument has counted down the no-fly time. There are, however, exceptions to this: You can change from AIR to NITROX mode, as well as from AIR or NITROX mode to GAUGE 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.
3. SUUNTO USER INTERFACE
3.1. Navigating in the menus
Suunto Cobra3 has four main operating modes - TIME mode (TIME), DIVE mode (DIVE), PLAN mode (PLAN), and MEMORY mode (MEMORY) – 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, PLAN and MEMORY modes, press the UP/DOWN buttons.
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3.2. Button symbols and functions
The table below explains the main functions of the dive computer's buttons. The buttons and their use is explained in more detail in the relevant sections of the user's guide.
Table 3.1. Button symbols and functions
Main functionsPressButtonSymbol
ShortMODE
LongMODE
Switch between main modes Switch from submode to main mode Activate backlight in DIVE mode
Activate backlight in other modes Activate stopwatch in DIVE mode
ShortSELECT
Select a submode Select and accept settings Select stopwatch to stop or start in DIVE mode
Activate compass in TIME and DIVE modesLongSELECT
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Main functionsPressButtonSymbol
ShortUP
Toggle between alternative displays Change submode Increase values
Activate gas switching in NITROX modeLongUP
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ShortDOWN
LongDOWN
Toggle between alternative displays Change submode Decrease values
Enter Setting mode Toggle between ceiling and remaining air time
display
4. GETTING STARTED
USE UP AND DOWN BUTTONS
TO TOGGLE BETWEEN ALARM, TIME,
DATE, UNITS, BACKLIGHT
AND TONES.
To get the most out of your Suunto Cobra3, use 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 Cobra3 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 to do with your Suunto Cobra3, is to modify the TIME mode settings: the time, alarm, date, units, backlight, and tones.
NOTE
The figure below shows how to enter the TIME Settings menu.
The display is illuminated by holding down the MODE button for more than 2 seconds.
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4.1.1. Setting the alarm
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
The dive computer has a daily alarm function. When the daily alarm activates, the screen blinks and the alarm sounds for 60 seconds. Press any button to stop the alarm.
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 a 12 and 24 hour display.
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4.1.3. Setting the date
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
In the Date setting mode, you are able to set the year, month, and day. The day of the week is automatically calculated in accordance with the date. In metric units the date is presented as DD/MM, and in imperial units as MM/DD.
4.1.4. Setting the backlight
In the Backlight setting mode, you are able 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.
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4.1.5. Setting the tones
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
In the Tones setting mode, you are able to activate or deactivate the tones.
NOTE
When the tones are off, there are no audible alarms.
4.2. AC water contacts
The water and data transfer contact is located on the rear of the case. When sub­merged, the water contact poles are connected by the conductivity of the water and the “AC” symbol appears on the display. The AC text is shown until the water contact deactivates.
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AC APPEARS IN THE TOP RIGHT
CORNER OF THE DISPLAY, WHEN THE DIVE
COMPUTER IS IN CONTACT WITH WATER.
THIS ALSO ACTIVATES THE DIVE MODE.
Contamination or dirt on the water contact may prevent this automatic activation. Therefore, it is 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.
4.3. Learning how to use your compass
Suunto Cobra3 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.
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IF ACCESSED FROM TIME MODE, TIME AND BEARING ARE DISPLAYED AT THE BOTTOM OF THE SCREEN.
IF ACCESSED FROM DIVE MODE,
CURRENT DEPTH AND TIME OR
MAXIMUM DEPTH, AS WELL AS BEARING
OR DIVE TIME OR TEMPERATURE ARE
DISPLAYED.
NOTE
When accessed from DIVE mode, toggle between the alternative displays by pressing the UP/DOWN buttons.
4.3.1. Compass display
The Suunto Cobra3 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.
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4.3.2. Locking a bearing
TO LOCK A BEARING,
PRESS SELECT.
A bearing can be locked to help you follow a selected course, and directional arrows point towards the locked bearing. The last locked bearing is stored and is available the next time the compass is activated. In the DIVE mode the locked bearings are also stored in the log.
The Suunto Cobra3 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
ExplanationSymbol
You are traveling towards the locked bearing
You are 90 (or 270) degrees from the locked bearing
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ExplanationSymbol
You are 180 degrees from the locked bearing
You are 120 (or 240) degrees from the locked bearing
4.3.3. Compass settings
You can define the compass settings (Calibration, Declination and Timeout) in the COMPASS mode:
Calibration
Because of changes in the surrounding magnetic field, the Suunto Cobra3 electronic compass occasionally needs to be re-calibrated. During the calibration process, the compass adjusts itself to the surrounding magnetic field and to tilting. As a basic rule, you should calibrate the compass whenever it does not seem to operate properly, or after replacing the dive computer's battery.
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First the compass is level calibrated and after a successful level calibration, the com­pass is tilt calibrated. The tilt calibration compensates for tilting the compass in any direction in angles of up to 45°.
Strong electromagnetic fields, such as power lines, stereo speakers, and magnets can affect the compass calibration. Therefore, it is advisable to calibrate the compass if your Suunto Cobra3 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 Cobra3 level during the level cal­ibration process. A deviation of ± 5° is allowed in any direction from the horizontal plane during level calibration.
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To calibrate the compass:
HOLD THE
DEVICE LEVEL AND SLOWLY ROTATE 360°.
HOLD THE DEVICE STILL AND SLOWLY TILT 90°
VERTICALLY.
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, power lines 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.
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.
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