Garmin Descent Mk3i Air-Integrated Dive Computer

Why Divers Choose the Garmin Descent Mk3i

The Garmin Descent Mk3i brings advanced dive-computer performance into a premium watch that can stay on your wrist long after the dive is over. Its vivid AMOLED color display, sapphire crystal lens, titanium bezel, and leakproof inductive buttons create a rugged platform that's designed for diving while remaining comfortable and functional for everyday wear.

For technical divers, the Mk3i supports Single-Gas, Multi-Gas, CCR, Gauge, Apnea, Apnea Hunt, and Pool Apnea modes. Garmin's Bühlmann ZHL-16C decompression model supports customizable gradient factors, while Air, Nitrox, and Trimix configurations can use up to 12 breathing gases for advanced decompression planning.

Pair the Mk3i with optional Garmin Descent T2 transceivers to add wireless tank-pressure monitoring and SubWave™ sonar networking. The Mk3i can monitor up to eight compatible transceivers and allows equipped divers to exchange preset underwater messages, giving dive teams an additional layer of communication and situational awareness.

Above the surface, the Descent Mk3i functions as a premium multisport GPS smartwatch with mapping, health and fitness tracking, training tools, music, notifications, Garmin Pay™, and access to Garmin's broader outdoor and navigation ecosystem.

Key Features

• Available in 43 mm and 51 mm case sizes with bright, high-resolution AMOLED color displays
• Dive-rated to 200 m / 656 ft for recreational and advanced technical diving
• Sapphire crystal lens and titanium bezel provide premium durability for demanding dive environments
• Bühlmann ZHL-16C decompression model with adjustable conservatism and custom gradient factors
• Single-Gas, Multi-Gas, CCR, Gauge, Apnea, Apnea Hunt, and Pool Apnea dive modes
• Supports Air, Nitrox, and Trimix with oxygen concentrations up to 100%
• Configure one bottom gas and up to 11 additional decompression or backup gases
• Wireless air integration with compatible Garmin Descent T1 and T2 transceivers
• Supports up to eight Descent T2 transceivers for tank-pressure and dive-team monitoring
• SubWave™ sonar enables compatible diver-to-diver preset messaging at distances up to approximately 30 meters
• Built-in 3-axis dive compass provides precise underwater navigation
• Surface GPS automatically records dive entry and exit locations
• DiveView™ mapping helps divers explore and plan around mapped dive locations
• Dive Readiness feature considers factors such as sleep, stress, exercise, and recent dives to help assess preparedness
• Audible and vibration alarms provide alerts for depth, ascent rate, decompression, gas switching, tank pressure, and other critical dive information
• Automatically syncs dive logs with the Garmin Dive™ app
• 51 mm model includes a built-in LED flashlight for surface and underwater use

From recreational reef dives and freediving to Trimix decompression, sidemount, CCR, wreck, and expedition diving, the Descent Mk3i combines Garmin's most advanced watch-style dive technology with the everyday capabilities of a premium multisport smartwatch.