Suunto Cobra3 Black with Quick Release and USB
Advanced air-integrated dive computer with electronic 3D compass. Made in Finland.
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.
PRODUCT HIGHLIGHTS
- Air, nitrox, and gauge modes
- 3D compass
- Suunto RGBM
- Easy-to-read matrix display
Specifications

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Measurements73 x 165 x 35 mm / 2.87 x 6.5 x 1.38 "
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Weight210 g / 7.41 oz
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Bezel material:Composite
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Glass material:Acrylic
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Case material:Composite
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Strap material:Elastomer
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What's in the box?Suunto Cobra3, high pressure hose included; Quick Release, dive manuals on DVD, Cobra3 Quick Guide and dive legal leaflet with warranty information
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Country of manufactureFI
- 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 and dive planner
- Detailed graphical logs and dive data on your computer using Suunto DM5 software
Technical specifications
GENERAL
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Bezel material:Composite
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Glass material:Acrylic
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Case material:Composite
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Strap material:Elastomer
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Declination correctionyes
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Weight210 g / 7.41 oz
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Water resistance100 m (ISO 13319)
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Battery life 100 dives/year1.5 years
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Battery type✔
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User replaceable battery✔
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Time, date✔
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Alarm clock1 daily alarm
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LanguagesEN
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Backlightelectro-luminescent
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Configurable backlightduration: 5, 10, 20, 30, 60 s
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Display typematrix
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Display resolution49 x 22
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Battery indicatorlow battery indicator
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Metric and imperial units✔
BATTERY LIFE
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In time mode3 years
CONNECTIVITY
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Data transferUSB cable (optional)
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Compatible with DM5✔
COMPASS
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Digital compass✔
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Tilt compensationup to 45°
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Direction scaledegrees
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Needlecompass rose
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Globally balanced✔
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Bearing lock with orienting indicator✔
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Compass accuracy10°
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Compass resolution1°
PHYSICAL SPECIFICATIONS
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Operating temperature0° C to +40° C / +32° F to +104° F
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Storage temperature-20 ° C to +50 ° C / -4° F to +122° F
DIVING FUNCTIONS
BASIC
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Maximum operating depth (EN 13319)100 m / 328 ft (EN 13319, ISO 6425)
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Nitrox (and air)✔
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Gauge✔
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Dive time0 to 999 min
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Surface time0 to 99 h 59 min
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No fly time✔
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Safety Stop✔
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Deep Stop✔
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Ascent time display0 - 99 min (- - after 99)
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CNS/OTU (OLF) calculation✔
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Hose air integration✔
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Decompression modelSuunto RGBM
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Personal adjustment0 - 2
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Altitude adjustment0 - 300 m / 300 -1500 m / 1500 - 3000 m
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Gasesup to 2 gases (Oxygen 21 - 99%)
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Gas max pO21.2 - 1.6
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Gas switching✔
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No-decompression planner✔
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Logbook memory~42 h (20 s sampling rate)
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Logbook bookmarks✔
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Logbook sampling rates1, 10, 20, 30, 60 s
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Dive historylifetime
DIVE ALARMS AND NOTIFICATIONS
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Dive time✔
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Maximum depth✔
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Tank pressure✔
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High pO2 (hyperoxic)✔
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Too fast ascent✔
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Decompression ceiling violation✔
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CNS/OTU (OLF) 80% / 100%✔
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Switch gas (better gas is available)✔
OUTDOOR FUNCTIONS
WEATHER
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Temperature display range-20° C to +50° C (+/- 2° C) / -9° C to +122° F (+/- 3.6° F)
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Temperature resolution1° C / 1.5° F
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Temperature✔