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The Descent X30 dive computer features a vibrant 2.4” display and a housing and bezel made with recycled ocean-bound plastics. With four large metal buttons, up to 30 hours of battery life and support for multiple dive profiles, it’s perfect for your next dive.
2.4” VIBRANT COLOUR DISPLAY
RUGGED DESIGN IS 10 ATM DIVE-RATED
4 LARGE, EASY-TO-USE LEAKPROOF BUTTONS
CHOOSE FROM MULTIPLE DIVE MODES
MARK ENTRY AND EXIT POINTS WITH SURFACE GPS
DIVE LONGER WITH NDL AWARE™ DEPTH METRICS

See critical information and custom dive screens at a glance on a large and easy-to-read colour display.

Orient the buttons on top of the display with flip-screen mode. Navigate your custom dive screens with up to three data fields per page. The large metal buttons are easy to use, even with gloves on.

Enjoy support for single- and multi-gas dive profiles, including trimix.

Extend your bottom time with NDL Aware depth metrics that work in real time to show how specific depth changes can impact your no-decompression limit (NDL).

Mark your surface entry and exit points with advanced satellite connectivity. Find your target before you dive with this GPS tool, and navigate underwater with the 3-axis digital compass.

100% of the plastic used in the dive computer’s housing and bezel is made with recycled ocean-bound plastics.
What You’ll Love | |
| Watch display type | LCD |
|---|---|
| Water rating | Dive (100 metres) |
General | |
| Strap material | Silicone |
|---|---|
| Lens material | Chemically strengthened glass |
| Bezel material | Fibre-reinforced polymer |
| Case material | Fibre-reinforced polymer |
| QuickFit® watch band compatible | Yes (26 mm) |
| Physical size | 78.7 x 61.8 x 24.7 mm Silicone band: 140-360 mm |
| Weight | No bands: 159 g With bands: 198.4 g |
| Leakproof inductive buttons | |
| Display Size | 2.4″ diagonal |
| Display Resolution | 320 x 240 pixels RGB |
| Colour display | |
| Large font option | |
| Battery type | Lithium ion |
| Battery life | Medium brightness (default): 30 hours High brightness: 10 hours Night dive: 47 hours |
| Charging method | Garmin proprietary clip charger |
| Memory/history | 4 GB |
Clock features | |
| Time/date | |
|---|---|
| GPS time sync | |
| Automatic daylight saving time | |
| Stopwatch | |
| Sunrise/sunset times | |
Sensors | |
| GPS | |
|---|---|
| GLONASS | |
| Galileo | |
| Compass | |
| Gyroscope | |
| Accelerometer | |
| Thermometer | |
| Ambient light sensor | |
| Depth sensor | |
Daily smart features | |
| Connectivity | Bluetooth®, ANT+® |
|---|---|
| Smart Notifications | |
| Text response/reject phone call with text (Android™ only) | |
| Weather forecasts | |
| Realtime settings sync with Garmin Connect™ mobile | Yes (also with Garmin Dive app) |
| Smartphone compatibility | iPhone®, Android™ |
| Passcode | |
Activity profiles | |
| Dive | Diving |
|---|---|
Tactical features | |
| Dual grid coordinates | |
|---|---|
Diving features | |
| Dive activity maximum operating depth | 100 metres |
|---|---|
| Single-gas mode | |
| Multi-gas mode | |
| Gauge mode | |
| Decompression model | Bühlmann ZHL-16c with gradient factors |
| Nitrox support | |
| Trimix support | |
| Gas mixes | Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. |
| PO2 | Up to 2.0 with customisable deco PO2 setting |
| Auto start/end dive | |
| Custom end-dive timeout | Yes (20s to 10 m) |
| Safety stop | Yes (customisable off/3min/5min) |
| Deep stops | Yes (using custom gradient factors) |
| Customisable conservatism | Yes (low/medium/high or custom using gradient factors) |
| Dive ascent/descent rate indicator | |
| Automatic altitude adjustment | |
| No fly time | |
| Dive planner | Yes (basic NDL + multi-gas deco planner) |
| Backlight | Yes (configurable intensity; always on) |
| Automatically saves dive entry and exit locations | |
| Sync dive log to Garmin Dive™ Mobile app | |
| Custom dive data screens | |
| Alerts and alarms | Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customisable (up to 40) audible and/or vibration per dive mode, based on depth or time |
| 3-axis dive compass | Yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading |
| Missed deco lockout | Yes (can be disabled prior to dive with user acknowledgement) |
| Residual tissue loading reset | Yes (on the surface with user acknowledgement) |
| Surface diver status widget | Yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) |
Boating features | |
| Built-in barometer and tide tables | Yes (downloadable tides) |
|---|---|
Training, planning and analysis features | |
| GPS speed and distance | |
|---|---|
| Touch and/or button lock | |
| Activity history on watch | |
Outdoor recreation | |
| Distance to destination | |
|---|---|
| GPS coordinates | |
Mapping & Navigation | |
| Point-to-point navigation | |
|---|---|
| Explore Nearby | |
| REFERENCE POINT | |
Security Information | |
| Security updates until at least (YYYY-MM-DD) | 2027-09-25 |
|---|---|