Garmin Descent Mk3i (Carbon Gray DLC Titanium, Black Silicone Band)

How long does the battery last during diving activities?

The Descent Mk3i provides up to 30 hours of continuous use in dive mode, which covers multiple diving sessions over several days. In smartwatch mode, the battery lasts up to 10 days with typical usage including notifications and activity tracking. Battery life varies based on display brightness, GPS usage and active features during dives.

What depth can this dive computer handle safely?

This dive computer is rated for depths up to 200 meters, making it suitable for technical diving and deep recreational dives. The titanium case construction and leakproof inductive buttons ensure reliable operation under extreme pressure. This depth rating exceeds most recreational diving limits and provides substantial safety margins for advanced divers.

How does the SubWave sonar communication work underwater?

SubWave technology uses sonar signals to transmit preset messages between compatible Garmin dive computers underwater. Divers can send status updates, warnings and basic communication without hand signals or complex equipment. The system requires software version 15.70 or later and works most effectively within close proximity to other SubWave-enabled devices.

Can this watch monitor air tank pressure during dives?

Yes, when paired with Garmin Descent T2 transceivers (sold separately), the Mk3i can monitor tank pressure and depth for up to eight networked divers simultaneously. This feature provides real-time air consumption data and remaining pressure readings on the watch display. It's particularly useful for dive leaders managing groups or technical divers monitoring multiple gas supplies.

What dive modes and customisation are available?

The watch includes multiple dive modes including single gas, multi-gas, gauge and apnea modes. Each mode can be customised with additional data screens showing the specific information you need. Big Numbers mode provides simplified displays with larger text for critical diving data. You can configure data fields, alarms and display preferences for each diving scenario.

Does this work as a regular smartwatch when not diving?

Absolutely. The Descent Mk3i functions as a full-featured smartwatch with built-in sports apps, music storage for up to 2,000 songs, smart notifications and Garmin Pay contactless payments. It tracks daily activities, sleep, stress and fitness metrics. The device seamlessly transitions between dive computer and smartwatch modes for everyday use.

How accurate is the GPS for marking dive sites?

The built-in GPS provides accurate surface positioning to mark entry and exit points for dive sites. It uses advanced satellite connectivity for precise location tracking before and after dives. The GPS data integrates with DiveView maps and dive logs, allowing you to record exact coordinates and navigate back to specific dive locations.

What comes included with the watch purchase?

The package includes the Descent Mk3i watch with carbon gray DLC titanium case, black silicone band, charging cable and documentation. The watch comes pre-loaded with DiveView maps covering over 4,000 dive sites worldwide. An integrated LED flashlight is built into the device. Tank pressure transceivers and other accessories are sold separately.