The Garmin Descent Mk3i is a premium dive computer and multisport smartwatch engineered for serious divers who demand precision, safety, and performance both underwater and on land. Built with a rugged 200-meter dive-rated case, sapphire lens, and bright AMOLED display, it delivers exceptional readability and durability in the most demanding dive environments.

Designed to support a wide range of diving styles, the Mk3i offers multiple dive modes including single-gas, multi-gas (nitrox and trimix), gauge, apnea, and closed-circuit rebreather diving. Advanced decompression calculations using the Bühlmann ZHL-16c algorithm help divers plan and execute dives with confidence.

With up to 66 Hours of battery life in dive mode and up to 25 days in smartwatch mode (depending on model), the Mk3i is built for extended adventures. Above the surface, it functions as a full-featured smartwatch with GPS navigation, fitness tracking, health monitoring, and smart notifications—making it an all-in-one companion for divers and outdoor explorers.

Key Features

• 200 m dive-rated computer with sapphire lens and AMOLED display
• Multiple dive modes: single-gas, multi-gas, nitrox, trimix, apnea, and rebreather
• SubWave™ sonar technology for diver communication and air integration
• Dive Readiness insights based on sleep, stress, and recovery
• Built-in DiveView maps with thousands of dive sites
• Surface GPS tracking for dive entry and exit points
• Dive log and data sync with the Garmin Dive™ app
• Up to 30 hours battery life in dive mode