Garmin - Descent Mk3i GPS Dive Smartwatch – 51 mm Fiber-reinforced polymer - Silver and Black PVD Titanium with Black/Gray Band - (2026)
About this product
Discover a deeper connection with the Descent Mk3i watch-style dive computer. It features multiple dive modes plus SubWave sonar technology for diver-to-diver communication via preset messages (available with software v.15.70 or later). The device also supports monitoring of tank pressures and depth for up to eight networked divers, when paired with the Descent T2 transceiver (sold separately). A built-in LED flashlight keeps you going in low-light conditions, above or below water. Purpose-built specifically for divers, the Descent Mk3i dive computer combines a bright 1.4” AMOLED display with scratch-resistant sapphire lens, 200-meter dive-rated case and metal leakproof inductive buttons. DiveView maps offer bathymetric depth contours and more than 4,000 dive sites to help you find where to dive and get oriented. Plus, a dive readiness tool, developed by Garmin, shows how lifestyle factors such as sleep, exercise, stress and jet lag can affect your body’s overall preparedness for diving — so, ultimately, you can make better-informed dive plan decisions (data presented is intended to be a close estimation of metrics tracked). This dive computer is designed to help maximize your preparation for the physical and mental challenges of diving. When you’re ashore, built-in sports apps help you stay on top of your fitness, while Garmin Pay contactless payments, music storage and smart notifications keep you connected (compatible smartphone required).
Features
Dive-focused design
With its bright 1.4” AMOLED color display, sapphire lens, 200-meter dive-rated case and leakproof metal inductive buttons, this watch is built to go deep.
Air integration
Pair with our Descent T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks via the SubWave sonar data network.
Subwave sonar networking
Exchange preset diver-to-diver messages up to 30 meters as well as monitor tank pressures and depth for up to 8 divers within a range of 10 meters.
Dive modes
Get multiple dive modes for single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed-circuit rebreather.
Dive readiness tool
This Garmin first technology shows how lifestyle factors such as sleep, exercise, stress and jet lag can affect your body — to help gauge when you are best prepared to dive.
Diveview Maps
Color maps on your wrist offer bathymetric depth contours and more than 4,000 dive sites to help you discover new places to dive and get oriented.
Built-in LED flashlight
See and be seen with variable light intensities and strobe modes, in or out of the water.
Long battery life
Stay in the water longer with up to 66 hours in dive mode plus up to 25 days in smartwatch mode.
Lume Mode
To aid readability and help maintain night vision, an ambient light sensor gives a green luminescence to your watch face in low-light conditions.
Post-dive activity guidance
Physical fitness is important for divers, but exercising shortly after a dive can increase the risk of decompression sickness. Post-dive activity guidance alerts you when it may be a good idea to postpone your training due to a recent dive.
Specifications
- Screen Size35.5 millimetersTouch ScreenYesOperating System CompatibilityAndroid, Apple iOSOperating SystemGarminOSApp CompatibleYesBuilt-in Storage32 gigabytes
Reviews
Rating 5 out of 5 stars with 1 review
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Compare similar products

Discover a deeper connection with the Descent Mk3i watch-style dive computer. It features multiple dive modes plus SubWave sonar technology for diver-to-diver communication via preset messages (available with software v.15.70 or later). The device also supports monitoring of tank pressures and depth for up to eight networked divers, when paired with the Descent T2 transceiver (sold separately). A built-in LED flashlight keeps you going in low-light conditions, above or below water. Purpose-built specifically for divers, the Descent Mk3i dive computer combines a bright 1.4” AMOLED display with scratch-resistant sapphire lens, 200-meter dive-rated case and metal leakproof inductive buttons. DiveView maps offer bathymetric depth contours and more than 4,000 dive sites to help you find where to dive and get oriented. Plus, a dive readiness tool, developed by Garmin, shows how lifestyle factors such as sleep, exercise, stress and jet lag can affect your body’s overall preparedness for diving — so, ultimately, you can make better-informed dive plan decisions (data presented is intended to be a close estimation of metrics tracked). This dive computer is designed to help maximize your preparation for the physical and mental challenges of diving. When you’re ashore, built-in sports apps help you stay on top of your fitness, while Garmin Pay contactless payments, music storage and smart notifications keep you connected (compatible smartphone required).

Explore uncharted territories. Push your limits. MARQ Adventurer (Gen 2) is a modern tool watch like no other. It’s built from grade-5 titanium to be harder and stronger, with a stunning new AMOLED touchscreen display that gives you up to 16 days of battery life in smartwatch mode and up to 42 hours in GPS mode. Guide the expedition with preloaded TopoActive mapping with NextFork, ClimbPro and real-time ascent data right on your wrist. Should adventure take you to higher altitudes, a Pulse Ox sensor monitors your blood oxygen saturation levels (This is not a medical device, and data presented is intended to be a close estimation of metrics tracked. Pulse Ox not available in all countries). Stay true to your path with built-in ABC navigation sensors and etched, 2-tone compass bezel. For adventurers looking to break new ground, it all starts here.

You’ve never been this connected to your game. Approach S72, our most advanced golf smartwatch, features a lightweight titanium bezel, a ComfortFit fabric band and 43,000+ preloaded courses with the data you need to help lower your score. After your round, look back to see how heart rate affected your performance and start to see trends in how it relates to your overall score (data presented is intended to be a close estimation of metrics tracked). When putting, know the break and where to aim with the green reading feature (on select courses) and use aerial imagery to get an enhanced look at the shot ahead (requires an active Garmin Golf membership). Use the driving range activity to record your session. Get swing metrics at the range and even review them postround to help you identify tendencies. Off the course, work on strength and mobility with preloaded activity profiles, monitor everyday health data and get up to 16 days of battery on a single charge.

Set the goal. Strive for victory. MARQ Athlete (Gen 2) is a modern tool watch like no other. It’s built from grade-5 titanium to be harder and stronger, with a stunning new AMOLED touchscreen display that gives you up to 16 days of battery life in smartwatch mode and up to 42 hours in GPS mode. Train with a wide variety of built-in sports apps, then push your limits with performance metrics and endurance and stamina tracking. Preloaded TopoActive maps with NextFork help you see the distance to the next trail intersection as well as the name of the upcoming trail. Athletes that never settle for anything but their best have found their match.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.




































































