Product Description
Garmin Descent™ Mk3i – 51 mm Watch-Style Dive Computer
DESCRIPTION
The Garmin Descent™ Mk3i – 51MM is a premium air-integrated dive computer and smartwatch designed for serious divers. With sonar-based diver communication, multi-tank tracking, and dive readiness analysis, it redefines underwater exploration.
Featuring a bright 1.4” AMOLED display, sapphire crystal lens, and a rugged DLC-coated titanium bezel, the Mk3i is built for the deep with a 200-meter dive rating. Preloaded DIVEVIEW™ maps provide bathymetric depth contours and dive site locations, while customizable dive screens let you personalize your underwater data display.
With Garmin's multisport functionality, the Mk3i transitions seamlessly from diving to trail running, skiing, cycling, surfing, and more. The built-in LED flashlight, turn-by-turn navigation, and VO2 max tracking enhance everyday usability. Garmin Pay™, music storage, and safety tracking keep you connected above and below water.
With up to 66 hours of battery life in dive mode and 76 hours in GPS mode, the Mk3i is engineered for endurance.
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.
- SUBWAVE SONAR-BASED DIVER MESSAGING (COMING SOON VIA REQUIRED SOFTWARE UPDATE)
- UP TO 66 HOURS OF BATTERY LIFE IN DIVE MODE
- CHOOSE FROM MULTIPLE DIVE MODES
- DIVEVIEW™ COLOR MAPS WITH DEPTH CONTOURS AND DIVE SITES
- USE THE DIVE READINESS TOOL TO INFORM YOUR PREPARATION
- BUILT-IN LED FLASHLIGHT WORKS ABOVE OR BELOW WATER
Key Features
AIR INTEGRATION
Pair with our Descent™ T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks via the SubWave sonar data network.
SUBWAVE SONAR NETWORKING
Exchange preset diver-to-diver messages (coming soon via required software update) up to 30 meters as well as monitor tank 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 first technology shows 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 than 4,000 dive sites to help you discover new places to dive and get oriented.
DIVE-FOCUSED DESIGN
With its bright 1.4” AMOLED color display, sapphire lens, 200-meter dive-rated case and leakproof metal inductive buttons, this watch is built to go deep.
DIVE FEATURES
BUILT-IN LED FLASHLIGHT
See and be seen with variable light intensities and strobe modes, in or out of the water.
DIVE LOG
Store and review data, track gear, take notes — and share via the Garmin Dive™ smartphone app.
LONG BATTERY LIFE
Stay in the water longer with up to 66 hours in dive mode plus up to 25 days in smartwatch mode.
CUSTOMIZABLE DIVE MODES
Add additional screens for each dive mode that features the fields you want to see.
SURFACE GPS
Track your entry and exit1 points on the surface with advanced satellite connectivity.
GARMIN DIVE APP
Pair the app with your Descent dive computer to automatically sync and upload your dive logs.
LUME MODE
To aid readability and help maintain night vision, an ambient light sensor gives a green luminescence to your watch face in low-light conditions.
DIVE COMPASS
Built-in ABC sensors, including an underwater compass, help navigate every part of your dive.
REFERENCE POINT
Use this GPS tool for surface navigation to a dive site, so you can drop right onto your target every time.
VARIOMETER
This tool helps you monitor your freedive descent and ascent rates through tone and vibration feedback.
BIG NUMBERS MODE
Get a simplified dive screen on your wrist, with larger text to see critical diving data.
TIDE DATA
Stay up to date on ocean conditions by pairing your Descent device with your compatible smartphone.
INREACH® DEVICE COMPATIBLE
Pair with inReach devices2 and the inReach dive case for satellite messaging off-grid.
HEALTH AND FITNESS FEATURES
SPORTS APPS
Use preloaded activity profiles for trail running, swimming, running, biking, hiking, rowing, skiing, golfing and more.
SURF ACTIVITY
Record the number of waves surfed, maximum speed reached, distance traveled and more.
SURFLINE® CAMERA
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.
BACKCOUNTRY SKI AND SNOWBOARD
Get ascent and descent data along with metrics such as cadence, stride length and grade.
VO2 MAX
See your current fitness level, and track changes over time to set goals, evaluate progress and more.
RECOVERY TIME
Know how long you need to recover before your next high-effort workout based on your latest training.
DAILY SUGGESTED WORKOUTS
View your entire week of daily suggested workouts, which adapt after every run or ride.
ANIMATED WORKOUTS
Follow animated workouts for cardio, strength, yoga and Pilates workouts on the watch screen.
WRIST-BASED HEART RATE
The watch constantly samples your heart rate4 to help you gauge how hard you work during activities.
PULSE OX SENSOR
Track your blood oxygen saturation while you’re awake or asleep, and gain awareness of how you’re adapting to altitude5.
JET LAG ADVISER
Help to minimize the effects of jet lag with guidance on light exposure, sleep schedule and exercise.
ENDURANCE SCORE
This measurement uses your VO2 max, training loads and other factors to show how training affects your ability to sustain prolonged physical efforts.
HILL SCORE
Based on your VO2 max and training history, this feature measures your strength and endurance for running uphill.
GARMIN COACH
Train for physical challenges with expert coaching and a dynamic training plan keyed to your goals and performance.
SLEEP MONITORING AND SLEEP SCORE
Understand your body’s recovery with sleep score, breakdown of your sleep stages and detailed insights for improved sleep quality4.
NAVIGATION AND ORIENTATION FEATURES
SATIQ™ TECHNOLOGY
Get superior positioning accuracy with multi-band GPS while optimizing battery life.
MULTICONTINENT TOPO MAPS
Preloaded TopoActive maps from around the world keep your explorations on track.
SKIVIEW™ MAPS
View run names and difficulty ratings for more than 2,000 preloaded ski resorts worldwide.
ABC SENSORS
Navigate your next trail with an altimeter, barometer and 3-axis electronic compass.
PACEPRO™ TECHNOLOGY
Plan race-day strategy with GPS-based pace guidance for a selected course or distance.
COURSES WITH TURN-BY-TURN DIRECTIONS
Create or find existing courses in the Garmin Connect™ app, or sync from your favorite third-party platforms, and get turn-by-turn directions.
ROUND-TRIP ROUTING
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
SAFETY AND TRACKING FEATURES
If you feel unsafe or if your watch senses that an incident occurred, your watch will send a message with your live location6.
MUSIC
Download songs and playlists from your Spotify, Deezer or Amazon Music accounts for phone-free listening.
GARMIN PAY™ CONTACTLESS PAYMENTS
Breeze through checkout lines or transit systems with participating providers.
SMART NOTIFICATIONS
Receive emails, texts and alerts on your watch when paired with your iPhone® or Android™ smartphone.
CONNECT IQ™ STORE
Add watch faces, data fields and apps to your paired smartwatch.
Detailed Specifications
| Feature | Specification |
|---|---|
| Lens Material | Sapphire Crystal |
| Bezel Material | Diamond-Like Carbon (DLC) Coated Titanium |
| Case Material | Fiber-Reinforced Polymer with Titanium Rear Cover |
| QuickFit™ Band | Yes (26mm) |
| Strap Material | Silicone or DLC-Coated Titanium |
| Physical Size | 51 x 51 x 16.4 mm |
| Wrist Fit |
Silicone Band: 135-230mm Extra-Long Band: 135-355mm Titanium Band: 135-220mm |
| Display Size | 1.4” (35.56 mm) diameter |
| Display Resolution | 454 x 454 pixels |
| Display Type | AMOLED with Lume Mode |
| Weight |
No Band: 77.8g Silicone Band: 105.6g Titanium Band: 165.9g |
| Battery Life |
Smartwatch Mode: Up to 25 days (10 days always-on) Dive Mode: Up to 66 hours GPS Mode: Up to 76 hours (56 hours always-on) Max Battery GPS Mode: Up to 118 hours |
| Water Rating | Dive (200 meters) |
| Memory/Storage | 32 GB |
In Package
Carbon Gray DLC Titanium with Black Band
- Descent Mk3i – 51 mm, carbon gray DLC titanium with black silicone band
- Black extra-long adjustment strap
- USB-C clip charging/data cable
- Documentation
Carbon Gray DLC Titanium with DLC Titanium Band
- Descent Mk3i – 51 mm, carbon gray DLC titanium with DLC titanium band
- Black QuickFit™ 26 silicone band
- Black extra-long adjustment strap
- USB-C clip charging/data cable
- Documentation
