The Descent series includes mixed-gas decompression dive computer functionality in a premium smartwatch with activity profiles, performance metrics and smart notifications. For those sport and technical divers who like a wrist-watch form factor suitable for everyday wear, the Garmin Descent Mk3series builds on the features of their fēnix® 7 Pro multi-activity GPS smartwatch to include SCUBA diving functionality.

The MK3i model adds support for their SubWave™ sonar data network which can share real time data — such as remaining dive time, gas consumption rate and more — while underwater during the dive for you and other MK3i divers within a range of {33 feet ! 10 meters}. The MK3i supports cylinder gas pressure integration, sometimes called air integration (AI), with up to eight (8) separately purchased optional Descent Tank Pod wireless T2 transceivers. New for the Mk3i model, you can also communicate via preformatted messages with other T2 networked buddies wearing their Descent™ Mk3i dive computers.

Once underwater, the Bühlmann ZHL-16C decompression algorithm with user configurable Gradient Factors allows individual control of your dive computer decompression calculations and stop depths. Full color graphics plus tone and vibration alerts help keep you informed while you’re submerged. During a decompression dive, the Descent can provide time-to-surface based on "look ahead" at planned gas switches along with current ceiling and stop time. Multiple gas definition presets are supported with any combination of air, nitrox, trimix and oxygen. For technical dives, the Descent is user configurable to NOT "lockout" after a missed stop. Even underwater (if worn next to the skin), the Descent is able to measure and display your actual heartbeat rate.

On land, the Descent also functions as a robust training and outdoor companion. It has profiles for running, cycling, swimming, as well as indoor workouts and recreational activities such as boating, golf, hiking, climbing, skiing and much more. Pinpoint navigation and topographic mapping (on the surface only) using both GPS and GLONASS satellite signals. Thanks to built-in Bluetooth, it supports notifications from a paired smartphone. It's also Wi-Fi enabled to connect and automatically send activity uploads, including your dive logs, for review or sharing on Garmin Connect. Store up to 2,000 songs, or access streaming music apps from your compatible services, including Spotify®, Deezer and Amazon Music. What’s more, the Descent design is suitable for wear as your everyday timepiece.

Diving Features, Functions and Alerts Highlights:

• Decompression dive computer with {1.4 inch | 36 mm} AMOLED color 454x454 pixel display in a richly featured multi-activity smartwatch
• Built-in sensors include depth, temperature, 3-axis compass, gyroscope, barometric altimeter and heart rate with pulse oximeter
• Supports open-circuit single-gas, multi-gas, closed-circuit rebreather (CCR), gauge and apnea (free-diving) modes
• Plan your dives directly on the device, including planned deco with gas switches
• Supports a bottom gas plus up to 5 decompression/backup gas mixes including air, nitrox, trimix and 100% oxygen
• Bühlmann ZHL-16c algorithm with configurable Gradient Factors
• GF presets for sport diving NDL safety factor: High = 35/75, Medium = 40/85, Low = 45/95
• Depth rated to { 660 fsw | 200 msw }, designed to comply with EN13319
• Various alerts (tone, vibration, display) for:
  
  
  • CNS Warning >= 80% and CNS Critical >= 100%
  • OTU Warning >= 250 and OTU Critical >= 300
  • NDL Warning >= 80% of inert gas limit and NDL Exceeded
  • PO2 Low < 0.18 ATA (suppressed first two minutes of dive)
  • PO2 High and PO2 Critical (user configurable up to 1.6 ATA)
  • Ascent rate fast >= {30 fpm | 10 mpm} for >= 10 seconds
  • Gas switch suggested (based on enabled gas list and selected switch PO2)
  • Approaching deco stop, deco stop completed and all deco complete
  • Depth Ceiling violation if above ceiling by {2.0 ft | 0.6 m}
  • Multiple user configurable depth and runtime alerts
  • User configurable safety stop
  • User configurable units: imperial (feet, psi) or metric (meters, bar)
  • Battery Low < 20% and Battery Critical < 10%
• Missed deco lockout can be disabled prior or post dive with user acknowledgement
• On device dive log lets you store and review data from up to 200 dives
• Store and share unlimited dive log online via Garmin Connect™ and its included mobile app
• Bluetooth Smart, Wi-Fi, ANT+ and SubWave supports wireless connectivity to a variety of devices including the T1 Tank Pod and other Mk2i dive computers as well as firmware updates.
• Battery life: Varies greatly depending on features enabled - Dive mode: Up to 66 hours, Smartwatch Mode: Up to 25 days. See the Product Attachments tab - Mk3 series owners manual page 157 for additional information.
• Construction material is a fiber-reinforced polymer body with sapphire crystal lens and titanium bezel; includes silicone wrist band. To improve the scratch resistance of the titanium, it has been treated with a diamond like carbon (DLC) coating.
• Physical size is: {2.0 x 2.0 x 0.65 inch} or {51 x 51 x 16.4 mm}

What's in the box? - The box contains the Garmin Descent Mk3i w/SubWave multi-activity smartwatch and dive computer with a standard length silicone QuickFit26 wrist band, plus an extra long silicone wrist band for use with thick exposure suits, along with a charging cable and quick start guide. There is also an titanium wristband option bundle that includes the silicone bands plus the Quickfit 26 DLC Titanium metal link band. Separately ordered optional Garmin accessories include the T2 tank pod transmitter, Quickfit 26 DLC Titanium metal link band, QuickFit 26 silicone wrist bands in choice of color, and additional USB data & charging cables. If you want a well padded case suitable for boat use and with room for the transmitter, consider adding the optional DGX Padded Storage Bag.