Description
The Garmin Descent Mk3i 51mm is Garmin's most advanced dive computer and multisport GPS smartwatch, engineered for serious divers, explorers and athletes who demand exceptional performance both underwater and on land. Featuring revolutionary SubWave™ sonar-based diver communication, air integration capabilities, advanced navigation tools, health monitoring and premium smartwatch functionality, the Descent Mk3i transforms the way you explore the underwater world.
Designed with a stunning 1.4-inch AMOLED display, sapphire crystal lens and a rugged 200-metre dive-rated case, this premium dive computer provides exceptional visibility, durability and reliability in the most demanding environments. Whether you're scuba diving, freediving, training for your next challenge or navigating remote landscapes, the Descent Mk3i delivers unparalleled confidence and capability.
Revolutionary SubWave™ Sonar Technology
Stay connected underwater like never before with Garmin's groundbreaking SubWave™ sonar networking technology. Exchange preset diver-to-diver messages at distances of up to 30 metres and monitor tank pressure, depth and diver data for up to eight divers within a 10-metre range when paired with compatible Descent™ T2 transceivers.
This innovative communication system enhances diver awareness, safety and team coordination, helping create a more connected underwater experience.
Comprehensive Dive Features
Built specifically for diving enthusiasts, the Descent Mk3i supports multiple dive modes including:
- Single Gas Diving
- Multi-Gas Diving
- Nitrox
- Trimix
- Closed-Circuit Rebreather (CCR)
- Gauge Mode
- Apnea
- Apnea Hunt
- Freediving
Customisable dive screens allow you to display the exact information you need, while Big Numbers Mode provides simplified, easy-to-read dive data during critical moments underwater.
Advanced underwater navigation is supported through a built-in dive compass, ABC sensors and surface GPS tracking, enabling you to accurately mark entry and exit points while maintaining awareness throughout your dive.
Dive Readiness & Post-Dive Guidance
The exclusive Dive Readiness Tool helps evaluate how factors such as sleep quality, stress levels, recent exercise and jet lag may impact your readiness to dive. This intelligent feature provides valuable insights before entering the water.
Following your dive, Post-Dive Activity Guidance helps minimise risk by advising when strenuous exercise may not be recommended after diving, supporting safer recovery and decompression practices.
DiveView™ Maps & Global Dive Site Navigation
Explore new underwater destinations with confidence using preloaded DiveView™ colour maps featuring bathymetric depth contours and access to more than 4,000 dive sites worldwide.
Additional navigation features include:
- Surface GPS tracking
- Reference Point navigation
- Round-trip routing
- Turn-by-turn course guidance
- Multi-band GNSS positioning
- SatIQ™ battery optimisation technology
- Worldwide TopoActive maps
- SkiView™ resort mapping
Whether you're locating a remote dive site or exploring mountain trails, the Descent Mk3i keeps you on course.
Exceptional Battery Performance
Stay underwater and on the move for longer with impressive battery life:
- Up to 66 hours in Dive Mode
- Up to 25 days in Smartwatch Mode
The extended battery performance supports multi-day adventures without constant recharging.
Built-In LED Flashlight
Integrated directly into the watch, the powerful LED flashlight provides variable brightness settings and strobe modes for visibility both above and below water. Perfect for night dives, emergency situations or everyday convenience.
Advanced Health & Performance Monitoring
The Descent Mk3i combines world-class diving technology with Garmin's most advanced health and fitness features, including:
- Wrist-Based Heart Rate Monitoring
- Pulse Ox Blood Oxygen Tracking
- Sleep Monitoring & Sleep Score
- Breathing Variations Analysis
- VO2 Max
- Endurance Score
- Hill Score
- Recovery Time
- Daily Suggested Workouts
- Jet Lag Adviser
- Lifestyle Logging
- Garmin Coach Training Plans
Gain a deeper understanding of your body's performance, recovery and readiness for both diving and athletic activities.
Built for Every Adventure
Beyond diving, the Descent Mk3i includes dedicated activity profiles for:
- Running
- Trail Running
- Cycling
- Swimming
- Hiking
- Rowing
- Golf
- Surfing
- Skiing
- Snowboarding
- Strength Training
- Yoga
- Pilates
Surf enthusiasts can even access Surfline® Sessions technology, wave data, tide information and surf forecasts directly from their wrist.
Premium Smartwatch Features
When you're not exploring beneath the surface, the Descent Mk3i functions as a premium everyday smartwatch with:
- Smart Notifications
- Garmin Pay™ Contactless Payments
- Offline Music Storage
- Spotify®, Amazon Music, Deezer & YouTube Music Support
- Connect IQ™ App Store
- Incident Detection & Safety Tracking
- inReach® Satellite Device Compatibility
Stay connected, informed and prepared wherever your adventures take you.
Rugged Design for Extreme Conditions
Crafted for serious explorers, the Garmin Descent Mk3i features:
- 51mm Case Size
- Bright 1.4" AMOLED Display
- Sapphire Crystal Lens
- Leakproof Metal Inductive Buttons
- 200 Metre Dive Rating
- Premium Rugged Construction
- Lume Mode for Night Vision Preservation
Combining premium materials with cutting-edge technology, the Descent Mk3i is engineered to perform in the world's most demanding environments.
Key Features
- SubWave™ Sonar-Based Diver Communication
- Air Integration & Diver Monitoring
- Multiple Dive Modes Including Nitrox & Trimix
- DiveView™ Maps with 4,000+ Dive Sites
- Dive Readiness Assessment Tool
- Built-In LED Flashlight
- Up to 66 Hours Dive Mode Battery Life
- 200m Dive-Rated Construction
- AMOLED Display with Sapphire Lens
- Surface GPS & Advanced Navigation
- Comprehensive Health & Fitness Tracking
- Garmin Pay™ Contactless Payments
- Music Storage & Streaming Support
- Smart Notifications
- Garmin Dive™ App Integration
The Garmin Descent Mk3i 51mm is the ultimate all-in-one dive computer, adventure watch and performance smartwatch, delivering advanced underwater communication, industry-leading dive capabilities and premium everyday functionality for those who refuse to compromise.
