Descent™ Mk3i – 51 mm

Descent™ Mk3i – 51 mm (Carbon Gray DLC Titanium with Black Silicone Band)

The Descent Mk3i – 51 mm is an advanced, air-integrated dive computer and multisport smartwatch designed for serious recreational and technical divers. It features SubWave sonar-based diver messaging and diver monitoring, DiveView color maps with depth contours, and a bright AMOLED display built for real-world readability.

Key Features

• Air integration support when paired with Descent T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks

• SubWave sonar networking for preset diver-to-diver messages (up to 30 meters) and monitoring tank pressures and depth for up to 8 divers (within 10 meters)

• DiveView color maps with bathymetric depth contours and more than 4,000 dive sites

• Built-in LED flashlight with variable light intensities and strobe modes

Navigation and GPS

• Surface GPS to track entry and exit points with advanced satellite connectivity

• Multi-band GPS with built-in mapping for above-water navigation

• Reference Point tool for surface navigation to a dive site

• Built-in ABC sensors including an underwater compass to help navigate your dive

Display and User Interface

• Display size: 1.4 inches (35.56 mm) diameter

• Display resolution: 454 x 454 pixels

• Color AMOLED display

• Leakproof inductive buttons

Diving Modes and Capabilities

• Dive modes for single and multiple gas dives including nitrox and trimix, plus gauge, apnea, apnea hunt, and closed-circuit rebreather

• Customizable dive modes so you can add screens with the fields you want to see

• Dive log to store, review, track gear, take notes, and share via the Garmin Dive smartphone app

• Long battery life with up to 66 hours in dive mode

Extras for Technical Divers

• Multi-gas support including nitrox and trimix, plus closed-circuit rebreather mode

• Air integration capability with SubWave sonar data network when paired with Descent T2 transceivers (sold separately)

• Big Numbers Mode option for simplified screens with larger critical dive data

Perfect For

• Technical divers who want multi-gas capability and closed-circuit rebreather support

• Divers who want air integration and buddy monitoring with compatible transmitters

• Divers who want surface GPS, mapping, and DiveView maps for trip planning and orientation

What's In The Box

• Descent Mk3i – 51 mm, carbon gray DLC titanium with black silicone band

• Black extra-long adjustment strap

• USB-C clip charging/data cable

• Documentation

Fit and Sizing

• Physical size: 51 x 51 x 16.4 mm

• QuickFit watch band compatible: 26 mm

• Fits wrists: 135 to 230 mm (silicone band)

• Fits wrists: 135 to 355 mm (extra long silicone band)

• Weight: 77.8 g (no band), 105.6 g (with silicone band)