Garmin Fenix DESCENT Preview & Specifications

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Garmin DescentWell, it’s called the Garmin DESCENT but it’s basically the FENIX in all but name.

It is tested a bit more heavily and built even more robustly than the Fenix 5X.


Target Market

Breathe Easier, Dive Better

Even at $1000, Garmin target recreational, technical and free diving.

Key Dive Features

  • Auto-activation on submersion
  • Dive metrics: current depth, dive time, water temperature, ascent/descent rate, no-deco time, decompression stop information, battery life and more on the unit’s crisp 1.2” color display.
  • Gas conservatism settings
  • 6x supported gas mixtures (Nitrox, Trimix, 100%O2)
  • Underwater compass
  • Tilt-compensated 3-axis electronic compass keeps bearing regardless of movement
  • Screen locks to avoid unintended presses


Detailed Diving Features

Dive activity maximum operating depth 100 meters (Designed to comply with EN13319)
Single-gas mode Yes
Multi-gas mode Yes
Gauge mode Yes
APNEA mode Yes
APNEA hunt 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 5 deco and/or backup gases
P02 Up to 1.6 with customizable deco PO2 setting
Auto start/end dive Yes
Custom end-dive timeout Sim (20 s a 10 m)
Safety Stop yes (customizable off/3min/5min)
Deep Stops yes (using custom gradient factors)
Customizable conservatism yes (low/medium/high or custom using gradient factors)
Dive ascent/descent rate indicator Yes
Automatic altitude adjustment Yes
No fly time yes (with 24hr countdown)
Dive planner yes (basic NDL + multi-gas deco planner)
Backlight yes (configurable time and intensity; auto-on at depth)
Automatically saves dive entry and exit locations Yes
Sync dive log to Garmin Connect™ and Garmin Connect™ Mobile Yes
Alerts & alarms Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customizable (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)



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Never ever would I or will I dive with a Grrmin. For easy dives (PADI Open water) no one needs a computer like that – a simple ZOOP is perfectly fine/reliable.

For “advanced dives” (multiple dives, mixed gas, gas switching, oxygen, fair/solid amount of deco time) you need something you really rock solid – Petrel/Perdix, OSTC+/2/4 are good choices.

For dive guides (DM, Instructor) a D4i/D6i is plenty enough – and reliable.