Garmin · Diving
The Garmin Descent™ Mk3i – 51 mm in Carbon Gray DLC Titanium with Black Silicone Band is an advanced, air-integrated dive computer and GPS smartwatch built for serious time in the water and structured training on land. With SubWave™ sonar-based diver messaging, multiple dive modes, and on-wrist color mapping, it helps divers plan, navigate, and review dives with confidence.
Out of the water, this watch supports multisport training and everyday smart features, pairing a bright 1.4” AMOLED display with sapphire crystal and a dive-rated case. Long runtimes, built-in sensors, and connected tools make it a capable choice for athletes who want a single device for diving, fitness, and daily wear.
SubWave™ sonar networking supports preset diver-to-diver messages up to 30 meters. It can also be used to monitor tank pressures and depth for up to 8 divers within a range of 10 meters, helping teams stay coordinated while underwater.
For integrated pressure monitoring, the Descent™ Mk3i pairs with Descent™ T2 transceivers using the SubWave sonar data network. Once paired, it can provide pressure monitoring on up to 8 tanks, keeping key gas information accessible on the wrist.
Designed for extended adventures, it delivers up to 66 hours of battery life in dive mode, plus up to 25 days in smartwatch mode. When using Dive Mode with Air Integration, battery life is up to 40 hours, supporting longer days centered around diving.
Durability
Multiple dive modes support single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed-circuit rebreather. Dive planning includes a basic NDL + multi-gas deco planner, and the dive feature set includes tools such as NDL Aware™ depth metrics and a 3-axis dive compass to help manage conditions and decisions throughout the dive.
Navigation
DiveView™ color maps provide bathymetric depth contours and more than 4,000 dive sites to help get oriented and explore new locations. For top-side use, it supports surface GPS to record entry and exit points with advanced satellite connectivity, plus a Reference Point tool to aid surface navigation to a dive site. Multicontinent TopoActive maps are also preloaded for worldwide exploration.
Display
The Descent™ Mk3i features a bright 1.4” AMOLED color display protected by a sapphire lens, along with a dive-rated case for Dive (200 meters). Leakproof metal inductive buttons are designed for underwater use. A built-in LED flashlight adds variable light intensities and strobe modes, helping improve visibility in or out of the water when conditions demand it.
| Part Number | 010-02752-10 |
|---|---|
| Model | Descent™ Mk3i – 51 mm |
| Configuration | Carbon Gray DLC Titanium with Black Silicone Band |
| Battery life (smartwatch mode) | Up to 25 days (10 days always-on) |
| Training status | Yes (improved) |
| Display type | AMOLED |
| Water rating | Dive (200 meters) |
| Strap material | Silicone or DLC coated titanium |
| Lens material | Sapphire crystal |
| Bezel material | Diamond-like Carbon (DLC) coated titanium or silver and black PVD coated titanium |
| Case material | Fiber-reinforced polymer with titanium rear cover |
| QuickFit® watch band compatible | Yes (26 mm) |
| Physical size | 51 x 51 x 16.4 mm; Fits wrists with the following circumference: Silicone band: 135-230 mm; Extra long silicone band: 135-355 mm; Titanium bracelet: 135-220 mm |
| Weight (no bands) | 77.8 g |
| Weight (silicone band) | 105.6 g |
| Weight (titanium band) | 165.9 g |
| Display Size | 1.4” diameter (35.56 mm) |
| Display resolution | 454 x 454 pixels |
| Battery life (Battery Saver Watch Mode) | Up to 31 days |
| Battery life (GPS Only) | Up to 76 hours (56 hours always-on) |
| Battery life (All Satellite Systems) | Up to 55 hours (43 hours always-on) |
| Battery life (All Satellite Systems + Multi-band) | Up to 48 hours (38 hours always-on) |
| Battery life (All Satellite Systems + Music) | Up to 17 hours |
| Battery life (Max Battery GPS) | Up to 118 hours |
| Battery life (Expedition GPS) | Up to 24 days |
| Battery life (Dive Mode) | Up to 66 hours |
| Battery life (Dive Mode with Air Integration) | Up to 40 hours |
| Charging method | Garmin proprietary clip charger |
| Memory/History | 32 GB |
| Descent Mk3i – 51 mm, carbon gray DLC titanium with black silicone band |
| Descent T2 transmitter |
| Black extra-long adjustment strap |
| USB-C clip charging/data cable |
| Air spool |
| Documentation |
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing |
|---|---|
| Multisport | Swimming/Running, Triathlon |
| Wellness | Walking, Pilates, Yoga, Indoor Walking |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Outdoor recreation | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Swim | Pool Swimming, Open Water Swimming |
| On the water | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Sailing Expedition, Whitewater |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| Racket sports | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Snow and winter | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| In the ring | Boxing, Mixed Martial Arts |
| Dive | Diving |
| Other activity profiles | Jumpmaster, Tactical, Inline Skating |
| What You'll Love | Sleep score and insights, Built-in mapping, Pulse Ox blood oxygen, LED flashlight, Garmin Pay™, Multi-band GPS, Music storage, Training readiness, Touchscreen |
|---|---|
| General | Leakproof inductive buttons, Color display, Large font option |
| Clock Features | Time/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset times |
| Health & Wellness Monitoring | Heart rate (constant, every second), Resting heart rate, Respiration rate, Body Battery™ energy monitor, All-day stress, Relaxation breathing timer, Breathwork, Nap detection, Health snapshot, Skin temperature and 1 more |
| Sensors | GPS, GLONASS, Galileo, SatIQ™ technology, Garmin Elevate™ wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer and 3 more |
| Daily Smart Features | Find My Phone, Find My Garmin (helps locate lost device), Find My Phone during GPS activity, Connect IQ™ (downloadable watch faces, data fields and apps), On-device Connect IQ™ Store, Smart Notifications, Text response/reject phone call with text (Android™ only), View images from notifications on watch (Android™ only), Morning report, Calendar and 11 more |
| Workout and Training Plans | Daily suggested workout - Running (pace and heart rate based), Daily suggested workout - Cycling (pace and heart rate based), Garmin running coach, Garmin running coach experts, Garmin cycling coach, Garmin Coach - Prebuilt cycling plans, Cardio workouts, Strength workouts, HIIT workouts, Yoga workouts and 3 more |
| Safety and Tracking Features | Incident detection during select activities, Incident detection alert on phone for wearables, Assistance, Live event sharing |
| Tactical Features | Dual grid coordinates, Kill switch, Night vision mode, Stealth mode, XERO™ Locations |
| Gaming Features | Gaming Activity, GameOn™ app compatible |
| Diving Features | Single-gas mode, Multi-gas mode, Gauge mode, APNEA mode, APNEA hunt mode, Pool APNEA, Nitrox support, Trimix support, Closed Circuit Rebreather (CCR), Subwave™ support and 13 more |
| Boating Features | Anchor Alarm, Autopilot Control, Virtual starting line, Countdown timer, Tack assist mode, Wearable trolling motor remote |
| Activity Tracking Features | Step counter, Move alerts (displays on device after a period of inactivity), Auto goal (learns your activity level and assigns a daily step goal), Calories burned, Floors climbed, Distance traveled, Intensity minutes, TrueUp™, Move IQ™, Automatic rep counting |
| Training, Planning and Analysis Features | Improved interval (includes open repeats, intervals data page, rest screen and auto detection), Customizable data pages, Downloadable training plans, Course guidance, HR zones, HR alerts, HR calories, % HR max, % HRR, Recovery time and 42 more |
| Running Features | GPS-based distance, time and pace, Running dynamics, Vertical oscillation and ratio, Ground contact time and balance, Stride length (real time), Cadence (provides real-time number of steps per minute), Running power, Grade-adjusted pace, Performance condition, PacePro™ pacing strategies and 7 more |
| Golfing Features | Preloaded with 43,000 courses worldwide, Yardage to F/M/B (distance to front, middle and back of green), Yardage to layups/doglegs, Digital scorecard, Custom targets, Stat tracking (strokes, putts per round, greens and fairways hit), Garmin AutoShot™, Full vector map, Auto CourseView updates, Green View with manual pin position and 14 more |
| Outdoor Recreation | Projected waypoint, UltraTrac mode, Elevation profile, Distance to destination, Barometric trend indicator with storm alert, Vertical speed, Total ascent/descent, Rest timer (ultra run only), Auto rest, Future elevation plot and 7 more |
| Mapping & Navigation | Point-to-point navigation, Bread crumb trail in real time, Back to start, TracBack®, Explore Nearby, Reference point, Up Ahead, ClimbPro™ Ascent Planner, NextFork™ navigation, Preloaded road and trail maps and 2 more |
| Cycling Features | Courses, Bike lap and lap maximum power (with power sensor), Race an activity, Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories), Power curve and % FTP workouts, Cycle Map (routable cycling-specific street map), MTB Grit & Flow, Advanced cycling dynamics, Compatible with Vector™ and Rally™ (power meters), Compatible with Varia Vision™ (head-mounted display) and 6 more |
| Swimming Features | Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories), Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories), Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only), Drill logging (pool swim only), Basic rest timer (up from 0) (pool swim only), "Repeat on" rest timer (pool swim only), Auto rest (pool swim only), Time and distance alerts, Pacing alerts (pool swim only), Countdown start (pool swim only) and 3 more |
| Abnormal heart rate alerts | Yes (high and low) |
|---|---|
| Fitness age | Yes (in app) |
| Sleep | Yes (advanced) |
| Hydration | Yes (in Garmin Connect™) |
| Women's health | Yes (in Garmin Connect™) |
| Connectivity | Bluetooth®, ANT+®, Wi-Fi®, Subwave™ |
|---|---|
| Smartphone compatibility | IPhone®, Android™ |
| Dive activity maximum operating depth | 200 meters |
|---|---|
| Decompression model | Bühlmann ZHL-16c with gradient factors |
| Gas mixes | Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. |
| PO2 | Up to 2.0 with customizable deco PO2 setting |
| Air integration | Yes (via Subwave™) |
| Number of transmitters supported | 8 |
| Custom end-dive timeout | Yes (20s to 10 m) |
| Safety stop | Yes (customizable off/3min/5min) |
| Deep stops | Yes (using custom gradient factors) |
| Customizable conservatism | Yes (low/medium/high or custom using gradient factors) |
| Dive planner | Yes (basic NDL + multi-gas deco planner) |
| Backlight | Yes (configurable time and intensity; auto-on at depth) |
| Available Boating Profiles | Boating, Sailing, Sail Racing |
|---|---|
| Boat Data Streaming | CIQ |
| Built-in barometer and tide tables | Yes (downloadable tides) |
Additional equipment (sold separately) and device pairing required
Sold separately; active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices. It is the responsibility of the user to know and follow all applicable laws in the jurisdictions where the device is intended to be used.
When paired with the Garmin Connect smart-device app and the Surfline smart-device app
Activity tracking and fitness metric accuracy
This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Pulse Ox not available in all countries.
This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Breathing Variations not available in all countries.
When paired with your compatible smartphone. See safety and tracking feature requirements and limitations. Feature not available while in dive mode.
SPOTIFY and the Spotify logo are among the registered trademarks of Spotify AB. Amazon Music and all related logos are trademarks of Amazon.com, Inc. or its affiliates. iPhone is a trademark of Apple Inc., registered in the U.S. and other countries. Android is a trademark of Google LLC.
