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Garmin Descent Mk3i Watch Style-Dive Computer 51mm Carbon Gray with Black Band
$1,599.99
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About this item
Highlights
- Pair with Garmin Descent T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks via the SubWave sonar data network.
- Exchange preset diver-to-diver messages (coming soon via required software update) up to 30 meters as well as monitor tank pressures and depth for up to 8 divers within a range of 10 meters.
- Get multiple dive modes for single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed-circuit rebreather.
Description
Featuring SubWave sonar-based communication and diver monitoring, this advanced, air-integrated Garmin Dive Computer and Smartwatch comes with Garmin innovations to help prepare you to make the most of your diving experience plus multisport training and smart features for your active life out of the water. Air IntegrationPair with Garmin Descent T2 transceivers (sold separately) for integrated pressure monitoring on up to 8 tanks via the SubWave sonar data network.Subwave Sonar NetworkingExchange preset diver-to-diver messages (coming soon via required software update) up to 30 meters as well as monitor tank pressures and depth for up to 8 divers within a range of 10 meters.Dive ModesGet multiple dive modes for single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed-circuit rebreather.Dive Readiness ToolThis 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 MapsColor 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.Dive-Focused DesignWith its bright 1.4-inch AMOLED color display, sapphire lens, 200-meter dive-rated case and leakproof metal inductive buttons, this watch is built to go deep.Built-In Led FlashlightSee and be seen with variable light intensities and strobe modes, in or out of the water.Dive LogStore and review data, track gear, take notes and share via the Garmin Dive smartphone app.Long Battery LifeStay in the water longer with up to 66 hours in dive mode plus up to 25 days in smartwatch mode.Customizable Dive ModesAdd additional screens for each dive mode that features the fields you want to see.Surface GPSTrack your entry and exit points on the surface with advanced satellite connectivity.Garmin Dive AppPair the app with your Descent dive computer to automatically sync and upload your dive logs.Lume ModeTo aid readability and help maintain night vision, an ambient light sensor gives a green luminescence to your watch face in low-light conditions.Dive CompassBuilt-in ABC sensors, including an underwater compass, help navigate every part of your dive.Reference PointUse this GPS tool for surface navigation to a dive site, so you can drop right onto your target every time.VariometerThis tool helps you monitor your freedive descent and ascent rates through tone and vibration feedback.Big Numbers ModeGet a simplified dive screen on your wrist, with larger text to see critical diving data.Tide DataStay up to date on ocean conditions by pairing your Descent device with your compatible smartphone.Inreach Device CompatiblePair with inReach devices and the inReach dive case for satellite messaging off-grid.Sports AppsUse preloaded activity profiles for trail running, swimming, running, biking, hiking, rowing, skiing, golfing and more.Surf ActivityRecord the number of waves surfed, maximum speed reached, distance traveled and more.Surfline CameraCreate a video of every wave you ride in front of a Surfline camera with Surfline Sessions technology. Use the Surfline widget to see tide, wave height, wind and surf rating for each of the five nearest surf spots.Backcountry Ski and SnowboardGet ascent and descent data along with metrics such as cadence, stride length and grade.Vo2 MaxSee your current fitness level, and track changes over time to set goals, evaluate progress and more..
Weight: 1 pounds
Compatible With: Android
Material: Silicone
Battery: Required, Included
TCIN: 1004951445
UPC: 753759332891
Origin: Imported
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Shipping details
Estimated ship dimensions: 10.4 inches length x 6.6 inches width x 8.3 inches height
Estimated ship weight: 1 pounds
We regret that this item cannot be shipped to PO Boxes.
This item cannot be shipped to the following locations: American Samoa (see also separate entry under AS), Guam (see also separate entry under GU), Northern Mariana Islands, Puerto Rico (see also separate entry under PR), United States Minor Outlying Islands, Virgin Islands, U.S., APO/FPO
item ships from third party seller: Focus Camera
Return details
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Guests are saying
The Garmin Descent MK3i is a versatile dive computer and smartwatch that excels in tracking underwater activities, fitness metrics, and daily health data. Guests appreciate its bright AMOLED display, exceptional battery life, and user-friendly interface. The watch is designed for both diving enthusiasts and active individuals, offering features like GPS, customizable settings, and a built-in flashlight. While it has some minor issues with sleep tracking and button sensitivity, it remains a top choice for those seeking a reliable and multifunctional device.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.6 out of 5 stars with 132 reviews
4 out of 5 stars
30 December, 2025
originally posted on Garmin
Beautiful Watch
I've actually only had the watch about 2 weeks and that is why I'm giving it 4 stars instead of five. The one thing Garmin could do that would help immensely is the addition of a quick start fundamentals guide included in the box. Garmin assumes everyone is capable of finding all the information for functions of this watch thru the App and Websites but I found that the basic startup was just a little confusing. I've owned an Apple Watch prior so I had some understanding of basic setup. This watch blows Apple right out of the water with its bright easy to read face and functionality with buttons and touchscreen. I"m still learning about its different features and operation, but so far I couldn't be happier about its performance. I did add an App to referee soccer matches and that was the main reason for buying the watch so far is working great. I hope to get an opportunity to check out some of the scuba diving features this summer.
5 out of 5 stars
27 December, 2025
originally posted on Garmin
Great upgrade!
I purchased this to upgrade from my MK1, I am a commercial diver and wear this everyday. I’m extremely impressed by how well it holds up to the rigors of commercial diving. I also use the MK3i for my main dive computer for recreational diving and it has never failed me. This is a great product and I would recommend it to anyone!
5 out of 5 stars
20 December, 2025
originally posted on Garmin
Hello MK3i, goodbye ultra2
If diving and fitness tracking are your top priorities—or you’re after a rugged, reliable multisport watch with outstanding battery life and complete independence from any smartphone ecosystem—go with the Garmin Descent Mk3i. It absolutely crushes the Apple Watch Ultra 2 on battery endurance: switching from daily charging on the Ultra 2 to charging just once every 10–25 days (depending on usage) with the Mk3i is a total game-changer for multi-day adventures or dive trips. The Ultra 2’s reliance on the subscription-based Oceanic+ app felt frustrating—limited interface for anything beyond recreational diving, an ongoing yearly fee, and it just wasn’t up to more technical needs. On top of that, cellular connectivity was unreliable (often failing without the iPhone nearby), and Siri prompts constantly conflicted with my phone. I also added Garmin’s Index smart scale and Index BPM blood pressure monitor to my setup—they integrate seamlessly with the Mk3i via Garmin Connect, making it effortless to log workouts, track recovery, and monitor overall health metrics in one place. The Mk3i is packed with so many advanced features (air integration, diver messaging, superior depth rating, and pro-level training tools) that I genuinely wish I’d switched from Apple sooner—it’s built for serious use without the constant hassles.
1 out of 5 stars
16 November, 2025
originally posted on Garmin
Horrible watch! Did not work and just locked up!
I would not buy this watch. After diving with 11 guys for a week the best answer is a the Apple Watch Ultra. The Apple Watch Ultra can function as a dive computer using the built-in Depth app and the Oceanic+ app. The Depth app automatically launches when submerged and tracks depth, time, and water temperature, while the Oceanic+ app provides more advanced features like dive planning and decompression information, requiring a subscription for full functionality. Just works!
5 out of 5 stars
8 November, 2025
originally posted on Garmin
Great watch
I purchased this watch as a dive watch, adventure race watch, and a running/open water swimming watch. I have been very impressed with the watch after a month of use. It is easy to see underwater and can be customized in so many different ways to display what you want to see underwater. Battery life is awesome! I am very happy with this watch, and still learning more everyday on what this thing can do.
5 out of 5 stars
31 October, 2025
originally posted on Garmin
Best battery life I've ever had on a smartwatch!!!
This thing just goes and goes! 25 days of battery life on a full charge. Gone are those days where I used to have to take off my watch every 3 to 4 days to charge it up. The greatest thing is it actually is a smartwatch and not just a dive computer. It shows messages can pay by tap, and a whole host of workout and physical condition information. Government is the best company! Now they just need to make a quality smartphone!
5 out of 5 stars
30 October, 2025
originally posted on Garmin
Couldn’t live without my MK3i
I only have great things to say about my MK3i. The watch and Garmin ecosystem have fundamentally awoke my fitness and health awareness. I appreciate the direction we are heading with wearable tech. One thing that I can attest to without any doubt is the absolute quality of the glass. I beat this watch up daily and have yet to scratch or crack the glass. The raised bezel does its job exceptionally well.
5 out of 5 stars
27 October, 2025
originally posted on Garmin
Best sports watch for divers ever!
I bought this over a months ago and I enjoy ever single day! So many things you can use it for besides diving, especially if you work out or doing anything active. The charge on the battery is insane it lasts forever. I have a teric and a perdix which are great dive computers but that’s all they are. I use this garmin for biking, swimming , working out and everything I try to do. Totally love it.
5 out of 5 stars
21 October, 2025
originally posted on Garmin
Has more features still learning what it can do.
bought it for diving it is great and not complicated have many others this one is the one
5 out of 5 stars
20 October, 2025
originally posted on Garmin
Super Excited
I have had all previous versions of the Descent MK and I have loved them! So was super keen to grab the MK3i! Super keen to take it for a spin off Straddie and also do the Noosa Tri in 2 weeks! Husband also gets a new computer in grabbing my MK2i now… lucky man
2 out of 5 stars
14 October, 2025
originally posted on Garmin
Nice watch
I enjoy the watch, but the transmitter does not stay connected. I keep losing my air pressure reading
1 reply from Care team - 3 months ago
Thank you so much for reaching out with this concern. We'd love to assist with this connection issue - please give us a call at 800-800-1020 so we can troubleshoot this with you and help find a solution. *KC
5 out of 5 stars
6 October, 2025
originally posted on Garmin
First Smart-Watch
I got the 51mm, and it is a chonk (in a good way). The titanium band is very nice, but even adjusted to smallest setting, is a touch loose for me (8” wrists), so consider that. I’ve done about 8 dives in murky water, but only down about 30 feet. The sceen is easy to read, and all the features seem very useful, even for a noob like me. It does a strange thing where it’ll go into “Red-Shift” mode rather randomly. And…..the flashlight is very handy! I use that all the time. Not cheap, but I have no regrets.
5 out of 5 stars
2 October, 2025
originally posted on Garmin
Great Scuba Diving Watch/Computer
What I like most about this watch is that it never loses communication with its’ transceiver, unlike other air-integrated dive watches I’ve owned; maybe because it’s range is 10 meters instead of just 1 meter. I also like that it automatically goes into dive mode with no required action by me except to descend below 4 feet. I also like that with the Garmin Descent S1 Buoy, I am able to find my way back to the dive boat (Find My Buoy) out to 100 meters, which was something I’ve been looking for over the 40 years that I’ve been diving.
5 out of 5 stars
21 September, 2025
originally posted on Garmin
Extraordinary Tool!
This is a fantastic tool to link with your phone and keep up with emails and other important input. It is Extraordinary accessory for diving and other sport activities. Not only is it excellent in keeping track of your time, depth, and air consumption (When using with a transmitter), It gives simple tools to track your dive buddies and send simple messages.
5 out of 5 stars
19 September, 2025
originally posted on Garmin
Impressive
I had a MK2i for 5 years. This is a nice improvment. The screen is wonderful.
5 out of 5 stars
15 September, 2025
originally posted on Garmin
A learning curve- But I like it.
I dive quite a bit, and this will simplify my back up dive computer & health monitoring, exercise recording.
5 out of 5 stars
9 September, 2025
originally posted on Garmin
Garmin Mki3
I bought this a few weeks ago, so far it has been the best and most comfortable watch I’ve had so far. Easy to navigate and upgraded from a tactix Bravo. Activities I tested so far with it: running, swimming, snorkeling, and diving. Battery life is insane, future content coming soon on my IG account @saltwater_discipline
5 out of 5 stars
8 September, 2025
originally posted on ExpertVoice.com

(no review title)
I love this to help me lose weight. The Garmin family is amazing. Best all in one dive computer I have.
3 out of 5 stars
7 September, 2025
originally posted on Garmin
A Powerhouse Watch with One Glaring Weakness
Overall, I really want to love my Garmin Descent Mk3i. As a tool for diving and fitness, it's nearly perfect. The GPS is lightning-fast, the build quality is exceptional, and the battery life truly lives up to the hype. It feels like a rugged, capable companion for adventures. However, for a watch in this premium price range, I have one significant gripe that holds me back from giving a full five stars: the sleep tracking is surprisingly inconsistent. The core of the issue isn't that it doesn't track sleep at all, but that it often does so inaaccurately and at the wrong times. For instance: · If I'm relaxing on the couch in the evening, being still while watching a movie or reading, the watch sometimes interprets this lack of movement as me being asleep. This leads to the "sleep" data starting far earlier than it actually does. · Conversely, on nights when I lie awake for a while, it doesn't always seem to capture that period of restlessness correctly. The other minor frustration is the somewhat rigid "Sleep Mode" schedule. While I understand the intent is to help with sleep hygiene, I wish it were more of a suggestion than a default. For those of us with irregular schedules, the automatic dimming and Do Not Disturb activation can be a nuisance if you're still active, and while you can adjust the times, you can't easily completely decouple it from the sleep schedule without manual intervention. The Bottom Line: This is a phenomenal diving and sports watch that feels let down by its sleep tracking features. If your primary focus is on underwater performance, surface activities, and navigation, the Mk3i is arguably one of the best you can buy. But if nuanced, granular sleep analysis is a top priority for you, this might not be the device to meet that specific need. It's a fantastic tool that's unfortunately just okay at tracking rest.
2 out of 5 stars
27 August, 2025
originally posted on Garmin
amoled is bad for an outdoor adventure watch
I wanted to try the latest garmin watch after wearing the descent mk1 and quatix 7 solar for many years. The previous watches used an e-ink style display with plenty of resolution, perfect visibility in sunlight, and the only battery saving technique I worried about was whether or not to update the display with every second tick. The mk3i takes several steps backwards with the amoled screen. Sure, the resolution and colors are beautiful, but it doesn't matter because the screen is in power saving mode frequently enough that there is nothing to see when you turn your wrist over (there is a required nightly sleep mode that requires your other hand to turn the screen on to see any output). And when the screen is on under heavy sunlight or with sunglasses on you can't read the output either. Overall I will sell this one in favor of the Felix 8e with the superior MIP display.