Answer the ocean’s call with Descent X30. This large-screen dive computer with a 2.4" vibrant colour display makes it easy to view critical information at a glance. Enjoy support for single and multi-gas dive profiles, including trimix. Navigate below the surface with the 3-axis compass and maintain situational awareness with audible and vibration alerts. Extend your bottom time with NDL Aware™ depth metrics and see in real time how specific depth changes impact your no-decompression limit (NDL). Built for divers by divers, Descent X30 features a housing and bezel made with recycled ocean-bound plastics. The rugged design features a 10 ATM dive rating and four large metal leakproof buttons. Use the surface GPS to navigate to dive sites and mark entry and exit points. Wirelessly upload your dive logs back on deck and review data from your dive in the Garmin Dive™ smartphone app. Plus, get up to 30 hours of battery life in dive mode so your can explore longer.

2.4" COLOUR DISPLAY 

The vibrant 2.4-inch display allows you to see critical information and custom dive screens at a glance on a large and easy-to-read colour display. 

FLIP-SCREEN MODE 

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 leakproof buttons are easy to use, even with gloves on. 

MULTIPLE DIVE PROFILES 

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

NDL AWARE™DEPTH METRICS 

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). 

SURFACE GPS AND COMPASS 

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. 

ECO-FRIENDLY DESIGN 

100% of the plastic used in the dive computers housing and bezel is made with recycled ocean-bound plastics. 

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: 160 g
  • With bands: 198.2 g
• Leakproof inductive buttons: Yes
• Display Size: 2.4″ diagonal
• Display Resolution: 320 x 240 pixels RGB
• Colour display: Yes
• Large font option: Yes
• 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: Yes
• GPS time sync: Yes
• Automatic daylight saving time: Yes
• Stopwatch: Yes
• Sunrise/sunset times: Yes

Sensors 

• GPS: Yes
• GLONASS: Yes
• Galileo: Yes
• Compass: Yes
• Gyroscope: Yes
• Accelerometer: Yes
• Thermometer: Yes
• Ambient light sensor: Yes
• Depth sensor : Yes

Daily smart features 

• Connectivity: Bluetooth®, ANT+®
• Smart Notifications: Yes
• Text response/reject phone call with text: (Android™ only)
• Weather forecasts: Yes
• Realtime settings sync with Garmin Connect™ mobile: Yes (also with Garmin Dive app)
• Find my watch: Yes
• Smartphone compatibility: iPhone®, Android™
• Passcode: Yes

Activity profiles 

• Dive: Diving

Tactical features 

• Dual grid coordinates: Yes

Diving features 

• Dive activity maximum operating depth: 100 metres
• Single-gas mode: Yes
• Multi-gas mode: Yes
• Gauge mode: Yes
• Decompression model: Bühlmann ZHL-16c with gradient factors
• Nitrox support: Yes
• Trimix support: Yes
• 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: Yes
• 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: Yes
• Automatic altitude adjustment: Yes
• No fly time: Yes
• Dive planner: Yes (basic NDL + multi-gas deco planner)
• Backlight: Yes (configurable intensity; always on)
• Automatically saves dive entry and exit locations: Yes
• Sync dive log to Garmin Dive™ Mobile app: Yes
• Custom dive data screens: Yes
• Alerts & 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: Yes
• Touch and/or button lock: Yes
• Activity history on watch: Yes

Outdoor recreation 

• Point-to-point navigation: Yes
• Explore Nearby: Yes
• REFERENCE POINT: Yes
• Distance to destination: Yes
• GPS coordinates: Yes