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Suunto Cobra3

Advanced air-integrated dive computer with electronic 3D compass

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Suunto Cobra3 is an all-in-one console-mounted dive computer. It features air-integration, an electronic 3D compass, an easy-to-read matrix display, and simplified four-button operation.

Air integration
Suunto Cobra3 monitors and displays your tank pressure, tracks your rate of air consumption, and continuously calculates your remaining air time. It also provides visual and audible alarms for depth and pressure and warns you when you're running low on air.

Clear navigation
Suunto Cobra3 features a unique electronic 3D compass that can be tilted up to 45 degrees in any direction, making it easier to read the figures clearly and accurately under water.

Effortless operation
The easy-to-read dot matrix display and electro-luminescent backlight mean all your dive-critical information – including bearing, tank pressure, depth, and dive time – will all be shown clearly. And with the simplified four-button operation, the computer is easy to operate even when wearing gloves.

Multi-mode versatility
With its Nitrox, Air, and Gauge modes and gas-switching capabilities, Suunto Cobra3 delivers everything you need to maximize bottom time and make the most of every dive. When using enriched air, Suunto Cobra3 can be programmed for nitrox mixtures between 21% and 100% oxygen. You can also adjust oxygen partial pressure between 0.5 and 1.6 bar. In Gauge mode, it can also be used as a depth gauge and timer with profile memory.

Flexible decompression
Using the Suunto Deep Stop RGBM algorithm, Suunto Cobra3 enables continuous decompression for optimal ascent time. For deeper dives, the Deep Stop option adds further protection with a series of deep stops between your maximum depth and ceiling.

When in Nitrox mode, you can accelerate decompression by switching to a gas mix with a higher oxygen percentage. With Suunto Cobra3 it's quick and easy to switch between enabled gas mixes while diving.

Plan and review
You can test upcoming dives and view no-decompression and decompression time data for different depths before getting in the water with the built-in dive simulator. When the dive is over, get detailed graphical logs and dive data on your computer using Suunto DM4 software.


  • Air, nitrox, and gauge modes
  • 3D compass
  • Suunto RGBM
  • Easy-to-read matrix display
  • Air integrated for tank pressure information
  • Tiltable electronic 3D compass to keep you on course
  • User-friendly design featuring easy-to-read matrix display and simplified four-button operation
  • Three dive modes and gas-switching capability for a range of dive situations
  • Continuous decompression with the Suunto RGBM algorithm
  • Built-in dive simulator for planning upcoming dives
  • Optional computer interface for detailed graphical logbooks and dive data analysis
Measurements 73  x  165  x  35  mm
Weight 210 g
Measurements 2,87  x  6,5 x  1,38 "
Weight 7,41 oz
Bezel material: Composite
Glass material: Acrylic
Case material: Composite
Strap material: Elastomer
Declination correction yes
Suunto Cobra3 – Technical specifications
Bezel material: Composite
Glass material: Acrylic
Case material: Composite
Strap material: Elastomer
Weight 210 g
Water resistance 100 m (ISO 13319)
Battery life in time mode 3 years
Battery life 100 dives/year 1.5 years
Battery type CR 2450
User replaceable battery
Time, date
Alarm clock 1 daily alarm
Languages EN
Backlight electro-luminescent
Configurable backlight duration: 5, 10, 20, 30, 60 s
Display type matrix
Display resolution 49 x 22
Battery indicator low battery indicator
Metric and imperial units
Data transfer USB cable (optional)
Compatible with DM5
Compatible with Suunto Movescount with DM5
Digital compass
Tilt compensation up to 45°
Direction scale degrees
Needle compass rose
Globally balanced
Bearing lock with orienting indicator
Compass accuracy 10°
Compass resolution
Operating temperature 0° C to +40° C / +32° F to +104° F
Storage temperature -20 ° C to +50 ° C / -4° F to +122° F


Maximum operating depth (EN 13319) 100 m
Nitrox (and air)
Dive time 0 to 999 min
Surface time 0 to 99 h 59 min
No fly time
Safety Stop
Deep Stop
Ascent time display 0 - 99 min (- - after 99)
CNS/OTU (OLF) calculation
Hose air integration
Decompression model SUUNTO RGBM
Personal adjustment 0 - 2
Altitude adjustment 0 - 300 m / 300 -1500 m / 1500 - 3000 m
Gases up to 2 gases (Oxygen 21 - 99%)
Gas max pO2 1.2 - 1.6
Gas switching
No-decompression planner
Logbook memory ~42 h (20 s sampling rate)
Logbook bookmarks
Logbook sampling rates 1, 10, 20, 30, 60 s
Dive History lifetime
Dive time
Maximum depth
Tank pressure
High pO2 (hyperoxic)
Too fast ascent
Decompression ceiling violation
CNS/OTU (OLF) 80% / 100%
Switch gas (better gas is available)


Temperature display range -20° C to +50° C (+/- 2° C) / -9° C to +122° F (+/- 3.6° F)
Temperature resolution 1° C / 1.5° F


User guides provide a comprehensive overview of product features, how to use them, as well as handling guidelines and technical specifications.

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Dive computer and device battery change

Suunto recommends dive computer and device batteries be changed by an authorized service center. You can find your nearest service center using the Suunto dealer locator – simply select service center and the product category. You can also get your Suunto product repaired with our online service request. The available countries are listed in the online service request page.

The benefits of using an authorized Suunto service center include:

  • In addition to the battery, O-rings, gaskets and other mechanical parts that are worn or damaged are also replaced.
  • Replacement batteries are new (full capacity) and parts conform to Suunto specifications, ensuring the battery lasts as specified and product integrity remains in tact.
  • The dive computer won’t be damaged by sudden ESD (electrostatic discharge), since the battery change is performed in an ESD safe environment.
  • After servicing, products are tested to ensure they function properly and are water resistant.
  • Servicing is performed by Suunto trained personnel, with proper tools and original Suunto spare parts ensuring the best care for your computer.
  • Suunto products repaired by an authorized service provider are covered by a three (3) month service warranty from the date of repair.

Suunto DM5 for planning and tracking your dives – for PC and MAC

Suunto DM5 allows you to download your dive logs for advanced analysis and upload detailed dive plans to your dive computer. The program is free to download. Suunto DM5 is available in English, Dutch, French, Finnish, German, Japanese, Korean, Spanish and Chinese. The minimum OS requirements are: Mac 10.7 or Windows XP. Read more about DM5.

The benefits of using Suunto DM5 include:

  • With the Suunto DM5 graphical dive planner, you can easily create dive profiles, manage gases as well as backup plans. When you are done, transfer planned gases and other dive-critical information to your dive computer (selected models only). You can also print gas mixing instructions from DM5.
  • After the dive you can transfer your dive logs to DM5. Your dives are stored in the logbook where you can review, analyze and organize them by date, mode and gear. The tagging function makes it easy to mark your dives and organize them according to your personal preferences. In addition you can select several dives to compare them with each other.
  • You can also save your dives in Suunto Movescount and share them with your friends.

Download Suunto DM5 for free here:



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

Warranty Period

The International Limited Warranty Period starts at the date of original retail purchase.
The Warranty Period is two (2) years for Products and Dive transmitters unless otherwise specified.
The Warranty Period is one (1) year for accessories including but not limited to wireless sensors, chargers, cables, rechargeable batteries, straps, bracelets and hoses.

Exclusions and Limitations

This International Limited Warranty does not cover:

  1. a) normal wear and tear such as scratches, abrasions, or alteration of the color and/or material of non-metallic straps, b) defects caused by rough handling, or c) defects or damage resulting from use contrary to intended or recommended use, improper care, negligence, and accidents such as dropping or crushing;
  2. printed materials and packaging;
  3. defects or alleged defects caused by use with any product, accessory, software and/or service not manufactured or supplied by Suunto;
  4. non-rechargeable batteries.

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

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

  1. has been opened beyond intended use;
  2. has been repaired using unauthorized spare parts; modified or repaired by unauthorized Service Center;
  3. serial number has been removed, altered or made illegible in any way, as determined at the sole discretion of Suunto; or
  4. has been exposed to chemicals including but not limited to sunscreen and mosquito repellents.

Access to Suunto warranty service

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

Limitation of Liability

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

Suunto warrants that during the Warranty period Suunto will, at its sole discretion, remedy defects in materials or workmanship free of charge either by a) repairing, or b) replacing with similar product, or c) refunding, subject to the terms and conditions of this Limited Warranty. This Limited Warranty does not cover a) wear and tear, b) rough handling, c) modifications, d) exposure to chemicals, or e) misuse. Unless local mandatory law provides otherwise, a) this limited warranty is only valid in the country of purchase and b) proof of purchase shall be provided when accessing warranty services. 

Warranty Period
Limited Lifetime Warranty:
Applicable to Suunto A, M, MC, MB and Clipper compasses.
The warranty period is limited until such reasonable time as the product is no longer reasonably usable due to wear and tear.

Limited 2-year Warranty:
Applicable to Suunto Arrow, Orca-Pioneer and KB compasses.
The Limited Warranty period is two (2) years from the date of original retail purchase.

Limitation of Liability
© Suunto Oy 12/2013. All Rights reserved.
Suunto is a registered trademark of Suunto Oy.

Get your Suunto product repaired with our online service request. Expand the online service request tab below to check the service availability in your country.

If your country is not covered, or if you have a compass or precision instrument, you can find your nearest service center using the Suunto dealer locator – simply select service center and the product category.

Online Service Request under maintenance work:

Online Service Request will undergo a maintenance work on Saturday, September 24 from 8.30 AM to 10.30 AM (UTC +2.00).
We apologize for the inconvenience this may cause.

Our online service request is available for the countries listed below. If your country is not covered, or if you have a compass or precision instrument, you can find your nearest service center using the Suunto dealer locator – simply select service center and the product category.

Repair is completed within approximately seven business days. If the product is not under warranty, we’ll send you a cost estimate before starting repair. If you decline our cost estimate, we will send the Product back to you and charge you a fixed sum for the analysis and freight that may vary according your country.

Instructions for completing the online service request:

  • 1. You need a valid email address, your product serial number and access to a printer.
  • 2. Choose your country from the list.
  • 3. Fill in the required information. Shipping documents are automatically created for you to print. Keep them with the product you’re sending to us.
  • 4. When you receive confirmation, call the courier at the number provided and your product will be picked up.
  • 5. Do not send user guides, instruction manuals or sales packages with your product. We’re not able to return them.
  • 6. If the solution is not covered by the warranty, we’ll send you payment details by email. Payments are made securely via PayPal.
  • 7. As soon as the product is repaired, it will be returned to the address you specified when you completed the service request.







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United Kingdom

United States

Suunto has a wide network of authorized service centers in different countries to help you with all your repair and maintenance needs. You can find your nearest service center using the Suunto dealer locator – simply select service center and the product category.

You can also contact Suunto customer support to find the best way to service your product.