Garmin Descent Mk3i 51mm Smartwatch Dive Computer (Silver/Black PVD Titanium)

Featuring SubWave sonar-based communication and diver monitoring, the Descent Mk3i is an advanced, air-integrated dive computer and smartwatch comes with Garmin innovations to help prepare you to make the most of your diving experience, plus multi-sport training and smart features for your active life out of the water.

Air Integration & SubWave Sonar Networking

Pair with Descent T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks, exchange preset diver-to-diver messages up to 30 meters away, and monitor depth and tank pressure data for up to 8 divers within a 10-meter range using the SubWave sonar network.

Comprehensive Dive Features

Supports multiple dive modes including single and multi-gas, nitrox, trimix, gauge, apnea, apnea hunt, and closed-circuit rebreather modes, plus customizable dive screens, Dive Readiness insights, DiveView color maps with 4,000+ dive sites, dive compass, variometer, NDL-aware depth metrics, sidemount tank switch guidance, surface GPS tracking, reference point navigation, tide data, big numbers mode, dive logging, and Garmin Dive app synchronization.

Dive-Ready Construction & Long Battery Life

Built with a bright 1.4-inch AMOLED display, sapphire lens, 200-meter dive-rated case, leakproof metal inductive buttons, ambient lume mode, and built-in LED flashlight with variable brightness and strobe modes, while delivering up to 66 hours of battery life in dive mode and up to 25 days in smartwatch mode.

Health, Fitness & Training Tools

Includes sports apps for running, swimming, cycling, skiing, golfing, surfing, rowing, and more, along with VO2 max, endurance score, hill score, wrist-based heart rate monitoring, Pulse Ox sensor, sleep tracking and sleep score, breathing variation monitoring, recovery time, daily suggested workouts, animated workouts, Garmin Coach training plans, lifestyle logging, jet lag adviser, Surfline integration, and backcountry ski/snowboard metrics.

Navigation, Connectivity & Smart Features

Features SatIQ multi-band GPS, preloaded TopoActive and SkiView maps, ABC sensors, PacePro pacing guidance, round-trip routing, turn-by-turn navigation, smart notifications, Garmin Pay contactless payments, onboard music support for Spotify, Deezer, Amazon Music, and YouTube Music, Connect IQ app compatibility, safety and incident tracking features, plus compatibility with inReach satellite communication devices for off-grid messaging.