DISCOVER A DEEPER CONNECTION
Featuring SubWave™ sonar-based communication and diver monitoring, this advanced, air-integrated1 dive computer and smartwatch comes with Garmin innovations to help prepare you to make the most of your diving experience — plus multisport training and smart features for your active life out of the water.
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SUBWAVE SONAR-BASED |
UP TO 66 HOURS OF |
CHOOSE FROM MULTIPLE |
DIVEVIEW™ COLOR MAPS |
USE THE DIVE READINESS |
BUILT-IN LED FLASHLIGHT |
AIR INTEGRATION
Pair with ourDescent™T2transceivers (sold separately) forintegrated pressure monitoringon up to 8 tanks via the SubWave sonar data network.
SUBWAVE SONAR NETWORKING
Exchange preset diver-to-diver messages up to 30 meters as well asmonitortank pressures and depth for up to 8 divers within a range of 10 meters1.
DIVE MODES
Get multiple dive modes for single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed-circuit rebreather.
DIVE READINESS TOOL
This Garmin firsttechnologyshows how lifestyle factors such as sleep, exercise, stress and jet lag can affect your body — to help gauge when you are best prepared to dive.
DIVEVIEW MAPS
Color maps on your wrist offer bathymetric depth contours and more than4,000 dive sitesto help you discover new places to dive and get oriented.
DIVE-FOCUSED DESIGN
With its bright 1.2″ AMOLED color display, sapphire lens, 200-meter dive-rated case and leakproof metal inductive buttons, this watch is built to go deep.
DIVE FEATURES
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DIVE LOG |
LONG BATTERY LIFE |
CUSTOMIZABLE DIVE MODES |
SURFACE GPS |
| Store and review data, track gear, take notes — and share via the Garmin Dive™ smartphone app. | Stay in the water longer with up to 30 hours in dive mode plus up to 10 days in smartwatch mode. | Add additional screens for each dive mode that features the fields you want to see. | Track your entry and exit points on the surface with advanced satellite connectivity. |
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GARMIN DIVE APP |
LUME MODE |
DIVE COMPASS |
REFERENCE POIN |
| Pair the app with your Descent dive computer to automatically sync and upload your dive logs. | To aid readability and help maintain night vision, an ambient light sensor gives a green luminescence to your watch face in low-light conditions. | Built-in ABC sensors, including an underwater compass, help navigate every part of your dive. | Use this GPS tool for surface navigation to a dive site, so you can drop right onto your target every time. |
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VARIOMETER |
BIG NUMBERS MODE |
TIDE DATA |
INREACH®DEVICE COMPATIBLE |
| This tool helps you monitor your freedive descent and ascent rates through tone and vibration feedback. | Get a simplified dive screen on your wrist, with larger text to see critical diving data. | Stay up to date on ocean conditions by pairing your Descent device with your compatible smartphone. | Pair with inReach devices2 and the inReach dive case for satellite messaging off-grid. |
HEALTH AND FITNESS FEATURES
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SPORTS APPS |
SURF ACTIVITY |
SURFLINE® CAMERA |
BACKCOUNTRY SKI AND SNOWBOARD |
| Use preloaded activity profiles for trail running, swimming, running, biking, hiking, rowing, skiing, golfing and more. | Record the number of waves surfed, maximum speed reached, distance traveled and more. | Create a video of every wave you ride in front of a Surfline camera with Surfline Sessions™ technology. Use the Surfline widget to see tide, wave height, wind and surf rating for each of the five nearest surf spots3. | Get ascent and descent data along with metrics such as cadence, stride length and grade. |
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VO2 MAX |
RECOVERY TIME |
DAILY SUGGESTED WORKOUTS |
ANIMATED WORKOUTS |
| See your current fitness level, and track changes over time to set goals, evaluate progress and more. | Know how long you need to recover before your next high-effort workout based on your latest training. | View your entire week of daily suggested workouts, which adapt after every run or ride. | Follow animated workouts for cardio, strength, yoga and Pilates workouts on the watch screen. |
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WRIST-BASED HEART RATE |
PULSE OX SENSOR |
JET LAG ADVISER |
ENDURANCE SCORE |
| The watch constantly samples your heart rate4 to help you gauge how hard you work during activities. | Track your blood oxygen saturation while you’re awake or asleep, and gain awareness of how you’re adapting to altitude5. | Help to minimize the effects of jet lag with guidance on light exposure, sleep schedule and exercise. | This measurement uses your VO2 max, training loads and other factors to show how training affects your ability to sustain prolonged physical efforts. |
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PULSE OX SENSOR |
PULSE OX SENSOR |
PULSE OX SENSOR |
WOMEN’S HEALTH TRACKING |
| Based on your VO2 max and training history, this feature measures your strength and endurance for running uphill. | Train for physical challenges with expert coaching and a dynamic training plan keyed to your goals and performance. | Understand your body’s recovery with sleep score, breakdown of your sleep stages and detailed insights for improved sleep quality4. | Track and log your menstrual cycle or pregnancy to get exercise and nutrition education. |
NAVIGATION AND ORIENTATION FEATURES
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SATIQ™ TECHNOLOGY |
MULTICONTINENT TOPO MAPS |
SKIVIEW™ MAPS |
ABC SENSORS |
| Get superior positioning accuracy with multi-band GPS while optimizing battery life. | Preloaded TopoActive maps from around the world keep your explorations on track. | View run names and difficulty ratings for more than 2,000 preloaded ski resorts worldwide. | Navigate your next trail with an altimeter, barometer and 3-axis electronic compass. |
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PACEPRO™ TECHNOLOGY |
COURSES WITH TURN-BY-TURN DIRECTIONS |
ROUND-TRIP ROUTING |
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| Plan race-day strategy with GPS-based pace guidance for a selected course or distance. | Create or find existing courses in the Garmin Connect™ app, or sync from your favorite third-party platforms, and get turn-by-turn directions. | Enter how far you want to go, and get suggested routes that will bring you back; even use TrendLine™ routing to find the best local paths. |
CONNECTED LIFESTYLE FEATURES
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SAFETY AND TRACKING FEATURES |
MUSIC |
GARMIN PAY™ CONTACTLESS PAYMENTS |
SMART NOTIFICATIONS |
| If you feel unsafe or if your watch senses that an incident occurred, your watch will send a message with your live location6. | Download songs and playlists from your Spotify, Deezer or Amazon Music accounts for phone-free listening. | Breeze through checkout lines or transit systems with participating providers. | Receive emails, texts and alerts on your watch when paired with your iPhone® or Android™ smartphone. |
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CONNECT IQ™ STORE |
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| Add watch faces, data fields and apps to your paired smartwatch. |
Garmin Descent Mk3i USER MANUALS
Garmin Descent Mk3i SOFTWARE
The Garmin Descent Mk3i is a premium multi-gas, air-integrated dive computer and advanced GPS smartwatch built for serious divers and high-performance athletes. Featuring SubWave™ sonar-based diver communication, integrated tank pressure monitoring, full-color DiveView™ maps, and advanced health tracking tools, the Mk3i delivers cutting-edge technology both underwater and on land.
With a rugged 200-meter dive rating, sapphire crystal lens, bright AMOLED display, and leakproof inductive metal buttons, the Descent Mk3i is engineered for recreational, technical, and freediving applications — while also functioning as a full-featured multisport smartwatch.
Advanced Diving Technology
• SubWave™ Sonar Diver Messaging – Exchange preset diver-to-diver messages up to 30 meters
• Air Integration – Pair with Descent T2 transceivers (sold separately) to monitor tank pressure for up to 8 divers
• Multiple Dive Modes – Air, Nitrox, Trimix, Gauge, Apnea, Apnea Hunt, and Closed-Circuit Rebreather
• Dive Readiness Tool – Analyzes sleep, stress, jet lag, and training load to help determine dive preparedness
• DiveView™ Color Maps – On-wrist bathymetric depth contours and over 4,000 global dive sites
• Surface GPS Tracking – Mark entry and exit points with multi-band satellite positioning
• Automatic Dive Logging – Sync dive data to the Garmin Dive app
• Built-in Dive Compass and ABC Sensors – 3-axis compass, altimeter, and barometer
• Integrated LED Flashlight – Works above and below water
Battery & Build Performance
• Up to 66 hours battery life in dive mode
• Up to 10 days in smartwatch mode
• 1.2” AMOLED high-resolution color display
• Sapphire crystal lens for durability
• 200-meter dive-rated case
• Leakproof metal inductive buttons
Freediving & Advanced Tools
• Freedive variometer with tone and vibration alerts
• Big Numbers Mode for simplified dive display
• Tide data integration (via smartphone pairing)
• Compatible with inReach satellite communication devices
Health, Fitness & Training Features
• Wrist-based heart rate monitoring
• Pulse Ox blood oxygen sensor
• VO2 Max and Endurance Score tracking
• Recovery Time and Daily Suggested Workouts
• Sleep Score and Jet Lag Adviser
• Women’s health tracking
• Preloaded sports apps including running, cycling, swimming, skiing, golf, surfing, hiking, and more
Navigation & Mapping
• Multi-band GPS with SatIQ™ technology for optimized accuracy and battery life
• Preloaded TopoActive and SkiView™ maps
• Turn-by-turn course navigation
• Round-trip routing and PacePro™ pacing guidance
Smartwatch & Connected Features
• Smart notifications for iPhone and Android
• Garmin Pay contactless payments
• Music storage and streaming support
• Safety and incident detection features
• Connect IQ app compatibility
Why Choose the Garmin Descent Mk3i?
The Garmin Descent Mk3i stands at the forefront of dive computer innovation, combining professional-level multi-gas support, sonar-based diver communication, integrated air monitoring, and detailed mapping with advanced fitness and smartwatch capabilities.
Whether you are a recreational diver, technical diver, freediver, or multisport athlete, the Descent Mk3i provides the safety tools, connectivity, and performance insights needed to elevate every dive — and every day.
