The Garmin Descent Mk3i is a premium watch-style dive computer engineered for serious divers who demand advanced performance both underwater and on the surface. Featuring multi-gas dive support, air integration compatibility, and a vivid AMOLED display, the Descent Mk3i delivers exceptional clarity and confidence in every dive environment.
Built-in surface GPS tracks dive entry and exit points, while dive readiness insights and advanced decompression planning help support informed dive decisions. Designed with rugged construction, intuitive button controls, and seamless integration with the Garmin Dive app, the Descent Mk3i is a powerful all-in-one solution for recreational, technical, and freedivers alike.
Key Features
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Advanced watch-style dive computer designed for recreational, technical, and freediving
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Multi-gas dive support, including Air, Nitrox, Trimix, and Gauge modes
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Air integration capable with compatible wireless transmitters for real-time tank pressure monitoring
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Dive readiness insights to help assess preparedness based on sleep, stress, and recent activity
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Surface GPS for accurate entry and exit point tracking
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Built-in dive planner with decompression calculations
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AMOLED display for exceptional clarity above and below water
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Rugged dive-rated construction built to withstand demanding underwater conditions
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Intuitive button-based controls for reliable operation with gloves
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Customizable dive screens for personalized data views
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Automatic dive logging and history tracking
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Supports freediving modes, including apnea and spearfishing profiles
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Vibration alerts and audible tones for key dive notifications
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Compatible with the Garmin Dive™ app for post-dive review and sharing
📊 Technical Specifications
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Dive computer type: Watch-style
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Display type: AMOLED
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Water rating: Dive-rated for recreational and technical diving
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Dive modes supported: Air, Nitrox, Trimix, Gauge, Freedive
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Air integration: Yes (with compatible transmitters)
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GPS: Multi-band GNSS support
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Sensors: Depth sensor, compass, barometer, accelerometer
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Connectivity: Bluetooth®
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Smart features: Notifications, activity tracking, health monitoring
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Compatible apps: Garmin Dive™, Garmin Connect™
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Controls: Physical buttons
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Battery: Rechargeable lithium battery
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Charging: Garmin proprietary charging cable
| Battery Mode | Mk3i 43mm | Mk3i 51mm |
|---|---|---|
| Smartwatch Mode | Up to 10 days (4 days always-on) |
Up to 25 days (10 days always-on) |
| Battery Saver Watch Mode | Up to 12 days | Up to 31 days |
| GPS Only | Up to 28 hours (22 hours always-on) |
Up to 76 hours (56 hours always-on) |
| All Satellite Systems | Up to 20 hours (16 hours always-on) |
Up to 55 hours (43 hours always-on) |
| All Satellite Systems + Multi-Band | Up to 17 hours (14 hours always-on) |
Up to 48 hours (38 hours always-on) |
| All Satellite Systems + Music | Up to 6 hours | Up to 17 hours |
| Max Battery GPS | Up to 44 hours | Up to 118 hours |
| Expedition GPS | Up to 10 days | Up to 24 days |
| Dive Mode | Up to 30 hours | Up to 66 hours |
| Dive Mode with Air Integration | Up to 15 hours | Up to 40 hours |
⚠ Ca Residents: Proposition 65 warning