Suunto Cobra 3: Picture 1 regular
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Suunto Cobra3 Air Integrated Computer with QD Hose

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Suunto Cobra 3: Picture 1 regular

About Suunto Cobra 3

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 dive computer has it all without overwhelming you with tools you'll never need or use One of the Cobra3's bragging rights is the 3-D compass, which will quickly become your new best friend; its ability to give a true reading, even at a 45° degree angle, will make keeping your heading easier than ever The four-button operation makes the Cobra 3 a snap to use; even if you're wearing thick dive gloves It is air and nitrox compatible and offers you every opportunity to make the most of your time underwater The Cobra 3 displays your tank pressure and remaining air time; two key features to keep you safe and below the surface as long as possible. The Cobra 3 graphs each dive profile and has a dive simulator, which offers you to run through your dive without getting your feet wet!

Navigating the Menu:
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 sub mode, which can be activated from either TIME or DIVE modes. To toggle between the main modes, press the MODE button. To select a sub mode in DIVE, PLAN and MEMORY modes, press the UP/DOWN buttons. Simple, intuitive and user friendly the Cobra3. The Cobra3 uses the Suunto Deep Stop RGBM algorithm that offers continuous decompression reading and offers an optimal ascent time. The goal of Suunto is to keep you safe; with that in mind, they included the deep stop option as part of the Cobra3. The deep stop option includes additional stops between the diver's maximum depth and ceiling to allow divers to off gas safely while making an ascent. The computer has a 42 hour of diving logbook memory.

The Cobra3 provides audible alarms and notifications for dive time, maximum depth, tank pressure, high pO2, fast ascents, decompression ceiling violations. The Cobra3 has a back lite display which makes seeing your dive data easy during night and day dives. Cobra3 provides a depth display to 330' (100 meters), its clock can be set with a 12 or 24 hour format, provides temperature reading above and below the surface to 1.5°F (1°C) accuracy and is altitude adjustable up to 10,000' (3,000 meters). The computer can be programed for Nitrox mixtures from 21% to 99% oxygen and displays oxygen partial pressures from 17.4 psi to 23.2 psi (1.2 to 1.6 bars). The Cobra3 is powered by a user replaceable 3 volt CR2450 lithium ion battery. Note: The Cobra3 has a pressure readout of 4,000 psi (300 bars) with a maximum allowed pressure of 5,000 psi (360 bars). The Computer can be set for imperial (feet) or metric (meter) measurements. Computer comes with an owner's manual. For safety of your investment the Cobra3 is equipped with a quick disconnect hose fitting allowing you to disconnect the computer from the 7/16" threaded high pressure hose. This feature allows you to stow your computer separately from your regulator system and is convenient for logging and downloading dive information.

The Suunto Cobra3 Air Integrated Computer with QD Hose is commonly used for Cold Water, Extreme Depths, Recreation, Warm Water and more. The Suunto Cobra3 Air Integrated Computer with QD Hose is most used by customers who consider themselves to be a Advanced, Professional among others. The Suunto Cobra3 Air Integrated Computer with QD Hose is popular because customers like the following qualities of the Suunto Cobra3 Air Integrated Computer with QD Hose: Easy To Operate, Easy To Read, Lots Of Functions, Reliable.

Warranty Information

This product has a limited warranty of 24 months.

Suunto Cobra 3 Features

  • Suunto Cobra3 Air Integrated Computer with QD Hose:
  • Algorithm: Bruce R. Wienke, BS, MS and PhD, Reduced Gradient Bubble Model (RGBM)
  • Operating Modes: Air, Nitrox and Gauge
  • Programmable for 21% to 99% Oxygen Mixtures
  • Displays Oxygen Partial Pressures from 17.4 psi to 23.2 psi (1.2 to 1.6 bars)
  • Altitude Adjustable Up to 10,000' (3,000 meters)
  • Maximum Depth Display: 330' (100 meters)
  • 12 or 24 Hour Clock Format
  • Temperature Gauge to 1.5°F (1°C) Accuracy
  • Imperial/Metric Programmable
  • Decompression Stop Data
  • Audible Alarms
  • 42 Hour Profile and Logbook Memory
  • User-Replaceable 3 Volt CR2450 Lithium-Ion Battery
  • Back Lite Display, Easy to Read in Low Light & Night Conditions
  • 0 to 5,000 psi (360 bars) Display
  • Suitable for 4,000 psi (300 bars) Cylinders
  • Hose Thread: 7/16" with QD Fitting
  • Tilt-Able Up to 45° Electronic 3D Compass to Keep You-On-Course
  • PC Compatible
  • Owner's Manual
  • Quick Guide

Suunto Cobra3 Air Integrated Computer with QD Hose Customer Reviews Powered by TurnTo®

Review Summary


(based on 14 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


The BEST Dive Computer

This is a great dive computer. It has all the functions you would need, then some. It is perfect for the rec diver, and has the ability to do full deco if you loose track of time. If you want to be a safe diver, the Cobra 3 is the computer for you.


Most Liked Negative Review


difficult to operate

This is, by far, the most complicated dive computer I have ever seen or used. Suunto factory service also leaves much to be desired. If you want something that is easy to operate, look at a computer that has no more than 2 buttons. There are many computers that can run circles around the Suunto and are MUCH easier to program and operate.

Reviewed by 14 customers

Displaying reviews 1-5

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Great unit for about 100 dives - then junk


from S.A., TX, US

I have 3 Cobra 2's and love them. Both are over 10 yrs old. I got the C3 for the small profile (digital compas). Right off, the tank pressure was never displayed as a default - had to toggle to it via button, which is annoying. After about 10 hrs of use, the software crashed. Stays in dive mode all the time with warnings to ascend to a 250' ceiling - and buttons are useless. Have to remove battery to shut it up. Compass is fixed and won't calibrate. Dealer says this is common for these units at about 4-5 yrs old no matter how much use and the Mfg. will do nothing. The program itself is fantastic, albeit extremely more conservative than any of the 4 other brands I have. For the price, I expect this to last longer so I'll never buy another.


be careful if you change the battery


I think this is an excellent instrument with great customer support; it is a bit complicated to access the different menus at first. I changed the battery once with no problems - the second time I changed it, I inadvertantly pinched the o-ring (as another reviewer stated) and it flooded on the first dive - however, Suunto service was able to repair it for $200 (it was out of warranty). OTOH, the compass remains a mystery to me!


Leaked and Failed on First Dive


Delivery was within expected dates and, so far, customer service has been cooperative in handling the return and credit.


great computer


clear view, easy to change screens, Still need to work on accessing the planner and quick look at the reccomended surface interval


Cobra 3 with quick disconnect


Spent a week in Cozumel right after I purchased this. I used the 50% RGBM. It worked great and was similar in dive times/No Decompression times as other computers. I had a variety of computers to compare with my friends I was diving with. We all had very similar data. The 50% RGBM is a great improvement for the Suunto Cobra 3 if you want a less liberal computer. Depth seemed to be accurate within 1ft. of all other computers in my party. I say this because some have their computers at chest level, while others have theirs at waist level. The quick disconnect is a great feature, especially if you need to remove your computer to keep it out of the sun. I don't like to keep my computer in the sun for extended periods of time, so it is easier to just remove it temporarily without removing your complete rig from your tank. After I was able to purchase the download cable, the data was a smooth transition from the Cobra 3 to my laptop for a more indepth look at the dive data.

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Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
RALPH B  I have been very pleased with this computer - I don't trust the wireless technology, since I had a problem with a previous unit (not Suunto). It gives excellent info - as an older diver, I appreciate its conservative aspect. (I got mildly bent years ago using the old ORCA Edge).
JOHN K V  Can the Cobra 3 use the same quick disconnect fitting as the Cobra 2?
BRIAN M  Yes, the Cobra 3 can use the same quick disconnect fitting as the Cobra 2.
George S  Yes, the quick connect fittings are identical.
Shopper  Does it have a compass also?
PETER K  Yes, it has a digital compass
WILFREDO O  Yes it does!
JEFFREY L  The cobra 3 has a compass built in, but you must switch to the compass mode to use it. The compass mode can be activated from the dive mode or the time mode. I had a problem with my unit. I could not switch modes but the battery check when the unit was turned on gave "battery ok". I changed the battery anyway, it now works.
MARK P G  Yes, it does
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