Garmin Descent Mk3i 43mm Dive Smartwatch

Garmin Descent Mk3i 43mm Dive Smartwatch

Name: Garmin Descent Mk3i 43mm Dive Smartwatch
Brand: Garmin
SKU: 010-02753-13
Price: 1399.99 USD
Availability: InStock

by Garmin

$1,399.99 - $1,399.99

$1,399.99

$1,399.99 - $1,399.99

$1,399.99

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Descent Mk3i 43 mm

Garmin Descent Mk3i 43mm Dive Smartwatch

The Garmin Descent Mk3i 43mm Dive Smartwatch is a dive computer built into a 43 mm watch with a titanium bezel, weighing 49.3 g without its band. The backlight turns on automatically at depth, and alarms sound and vibrate for ascent rate, PO2, NDL and gas switching. Technical divers can plan with air through trimix at up to 100% oxygen: one bottom gas and up to 11 deco or backup gases. An extra-long strap in the box stretches the fit out to a 360 mm wrist. The finishes are bronze PVD titanium on a French gray band or carbon gray DLC titanium on a black band.

The Garmin Descent Mk3i is an air-integrated dive computer and GPS smartwatch built for deep, connected exploration. With a bright 1.2-inch AMOLED display, 200-meter dive rating, sapphire lens, and inductive metal buttons, it's built for technical diving and extreme durability. With SubWave sonar technology and up to 8 Descent T2 transceivers (sold separately), you can monitor tank pressure and send diver-to-diver messages. The same transceivers let you keep track of your dive team, all without surfacing. SubWave messaging is a supplemental feature that should not be relied upon as a method to receive emergency assistance. DiveView color maps, multi-gas dive modes, surface GPS, and a personalized Dive Readiness Tool help you prepare for every dive.

Out of the water, the Mk3i moves into your daily life with multisport training, smart notifications, music storage, Garmin Pay, and health tracking features like VO2 max, Pulse Ox, sleep monitoring, and Jet Lag Adviser. Smart notifications arrive when paired with your compatible smartphone (music subscription may be required). Preloaded topo, ski, and golf maps plus turn-by-turn navigation make it your go-anywhere adventure companion. It runs up to 30 hours in dive mode and carries a full set of smartwatch features.

Sapphire crystal lens Leakproof inductive buttons Titanium rear cover USB-C clip charger

Garmin Descent Mk3i 43mm, the dive mode menu on the AMOLED screen

Built for technical diving

How it works

Air integration

Each paired Descent T2 transceiver reports its tank pressure to the watch, along with gas time remaining and your gas consumption rate.

Up to 8 tanks

Decompression model

Buhlmann ZHL-16c with gradient factors sets your stops, with conservatism at low, medium, high or a custom gradient factor of your own.

Dive readiness

Sleep, exercise, stress and jet lag feed a score that informs your preparation; it does not measure whether it is safe for you to dive.

Post-dive guidance

After a dive, an alert tells you when it may be a good idea to postpone your training.

On every dive

Key features

DiveView maps

Bathymetric contours and more than 4,000 dive sites

Surface GPS

Marks your entry and exit points

Deco planner

Basic NDL and multi-gas planning on the watch

Tides

Tide data via your paired smartphone

Variometer

Descent and ascent feedback on a freedive

Big Numbers mode

A simpler dive screen in large type

Lume mode

A night vision setting read by the ambient light sensor

Garmin Dive app

Dive logs sync and share from your phone

Living with the 43 mm

How to use it

Build

Coated titanium bezel

The bezel is diamond-like carbon (DLC) coated titanium or bronze PVD coated titanium, over a fiber-reinforced polymer case with a titanium rear cover. Leakproof inductive metal buttons handle every press, at the surface or at depth.

QuickFit 20 mm band compatible
Silicone band fits 128-224 mm wrists
Weighs 68.3 g on its silicone band

Garmin Descent Mk3i 43mm, the sensor for wrist heart rate

Recovery

Body Battery on a dive trip

Body Battery, an estimate of your energy reserves through the day, and the morning report, a summary of your sleep, recovery and planned training when you wake, both come along on a dive trip.

Jet Lag Adviser adds light, sleep and exercise guidance for the first days in a new time zone.

Sleep score and sleep stages
Skin temperature and respiration rate
Health snapshot, a 2-minute log of key stats

Modes

Dive modes for every kind of dive

Single-gas, multi-gas, gauge, apnea, apnea hunt, pool apnea and closed circuit rebreather (CCR) modes each keep their own data fields. PO2 runs up to 2.0 with a customizable deco setting.

Up to 40 custom alerts per dive mode, by depth or time
Side mount support
Residual tissue loading reset on the surface

Descent Mk3i in the water

Videos

Descent sizes beside a Fenix 8

How it compares

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Garmin Descent Mk3i 43mm, dive computer in bronze titanium

Garmin Descent Mk3i 43mm Dive Smartwatch

Air-integrated dive computer and smartwatch in a 43 mm case.

200 m dive rating Up to 30 hr dive mode 1.2 in. AMOLED

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Descent Mk3i 43 mm

Frequently asked questions

The watch on its silicone band, an extra-long adjustment strap, a USB-C clip charging and data cable, and documentation. The bronze version ships with a French gray band and strap.

Yes. Tank pressure and diver messaging run over SubWave from Descent T2 transceivers, which are sold separately and paired to the watch. One watch reads up to 8 of them.

To 200 meters, in a case with leakproof inductive buttons. The diving features of this device are for use by certified divers only. This device should not be used as a sole dive computer.

Yes. The Garmin Dive app auto-syncs your dive logs, and you can share them from there.

The silicone band fits wrists from 128 to 224 mm, and the extra-long strap reaches 360 mm. The case measures 43 x 43 x 14.3 mm.

Yes, paired with an inReach device (sold separately; active satellite subscription required), it can trigger an SOS message while above the surface. Some jurisdictions regulate or prohibit the use of satellite communication devices. You can also sync your Divers Alert Network (DAN) ID, with DAN membership required.

Yes. A basic NDL and multi-gas deco planner runs on the watch, covering air, nitrox and trimix.

Garmin backs it with a one-year limited warranty from the date of purchase against defects in materials or workmanship, and Garmin repairs or replaces defective components.

Display type: AMOLED
Touchscreen: Yes
Display size: 1.2 in. (30.4 mm) diameter
Display resolution: 390 x 390 pixels
Color display: Yes
Large font option: Yes
Water rating: Dive (200 meters)
Lens material: Sapphire crystal
Bezel material: Diamond-like Carbon (DLC) coated titanium or bronze PVD coated titanium
Case material: Fiber-reinforced polymer with titanium rear cover
Strap material: Silicone
Leakproof inductive buttons: Yes
QuickFit watch band compatible: Yes (20 mm)
Physical size: 43 x 43 x 14.3 mm
Fits wrists: Silicone band: 128-224 mm; extra long silicone band: 128-360 mm
Weight: No band: 49.3 g; silicone band: 68.3 g
Battery life: Smartwatch: up to 10 days (4 days always-on); battery saver watch mode: up to 12 days; GPS only: up to 28 hours (22 hours always-on); all satellite systems: up to 20 hours (16 hours always-on); all satellite systems + multi-band: up to 17 hours (14 hours always-on); all satellite systems + music: up to 6 hours; max battery GPS: up to 44 hours; expedition GPS: up to 10 days; dive mode: up to 30 hours; dive mode with air integration: up to 15 hours
Charging method: Garmin proprietary clip charger
Memory/history: 32 GB
Dive activity maximum operating depth: 200 meters
Dive modes: Single-gas, multi-gas, gauge, apnea, apnea hunt, pool apnea, closed circuit rebreather (CCR)
Decompression model: Buhlmann ZHL-16c with gradient factors
Gas mixes: Air, nitrox and trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gases
PO2: Up to 2.0 with customizable deco PO2 setting
Air integration: Yes (via SubWave; Descent T2 transceivers sold separately), up to 8 transmitters
Dive planner: Basic NDL and multi-gas deco planner
Dive alerts: Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure and gas consumption rate; up to 40 customizable alerts per dive mode, by depth or time
Backlight: Configurable time and intensity; auto-on at depth
Conservatism: Low, medium, high or custom using gradient factors
Missed deco lockout: Yes (can be disabled prior to dive with user acknowledgement)
Built-in mapping: Yes
Music storage: Yes
Garmin Pay: Yes
Multi-band GPS: Yes
Pulse Ox blood oxygen: Yes
Sleep score and insights: Yes
Training readiness: Yes
Training status: Yes (improved)
Wrist-based heart rate (constant, every second): Yes
Abnormal heart rate alerts: Yes (high and low)
Body Battery energy monitor: Yes
Skin temperature: Yes
Jet lag adviser: Yes
Health snapshot: Yes
Sensors: GPS, GLONASS, Galileo, SatIQ technology, Garmin Elevate wrist heart rate monitor, Pulse Ox, barometric altimeter, compass, gyroscope, accelerometer, thermometer, ambient light sensor, depth sensor
Connectivity: Bluetooth, ANT+, Wi-Fi, SubWave
Smartphone compatibility: iPhone, Android
Compatible with Garmin Messenger app: Yes
Red shift mode: Yes
Garmin Share: Yes
Stocks: Yes

Air integration with Descent T2 transceivers (sold separately)
SubWave sonar networking with diver-to-diver messaging and pressure monitoring (dive messaging is a supplemental feature and should not be relied upon as a method to receive emergency assistance)
Multiple dive modes including nitrox, trimix, gauge, apnea, and rebreather
Dive readiness tool based on sleep, exercise, stress, and jet lag
DiveView maps with bathymetric contours and 4,000+ dive sites
Bright 1.2-inch AMOLED display, sapphire lens, 200 m dive-rated case
Dive log with sharing via Garmin Dive app
Up to 30 hours battery in dive mode; 10 days in smartwatch mode
Customizable dive modes with user-defined fields
Surface GPS to track dive entry and exit points
Garmin Dive app auto-syncs dive logs
Lume Mode for night vision with ambient light sensor
Underwater compass with built-in ABC sensors
GPS Reference Point for surface navigation to dive sites
Variometer for freedive descent/ascent feedback
Big Numbers Mode for simplified dive screen readability
Tide data via paired smartphone
inReach compatible for off-grid satellite messaging (inReach device sold separately; active satellite subscription required)
Preloaded sports apps: trail running, swimming, biking, rowing, golf, more
Surf activity tracking: wave count, speed, distance
Surfline camera + Sessions video and surf forecast widget (when paired with the Garmin Connect and Surfline apps)
Backcountry ski and snowboard metrics including cadence and stride
VO2 max for fitness level monitoring
Recovery time recommendations after training
Daily suggested workouts adapting to progress
Animated workouts for cardio, strength, yoga, Pilates
Wrist-based heart rate monitoring
Pulse Ox sensor for blood oxygen. This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition.
Jet lag adviser with light/sleep/exercise guidance
Endurance score based on VO2 max and training load
Hill score for uphill strength and endurance
Garmin Coach with dynamic training plans
Sleep monitoring with stages, score, and insights
Women's health tracking for menstrual cycle or pregnancy. The menstrual cycle tracking feature should not be used in support of conception, contraception or birth control. This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition.
SatIQ tech for optimized multi-band GPS accuracy
Multicontinent TopoActive maps preloaded
SkiView maps for 2,000+ ski resorts
ABC sensors: altimeter, barometer, compass
PacePro strategy planning for GPS-based race pacing
Turn-by-turn navigation with Garmin Connect or 3rd-party courses
Round-trip routing with TrendLine popularity data
Safety and tracking: sends location if incident occurs (when paired with your compatible smartphone; not available while in dive mode)
Music storage and playback from Spotify, Deezer, Amazon Music (subscription may be required)
Garmin Pay contactless payments
Smart notifications for calls, texts, and emails (when paired with your compatible smartphone)
Connect IQ store access for apps, watch faces, and more

Descent Mk3i - 43 mm watch with silicone band
Extra-long adjustment strap
USB-C clip charging/data cable
Documentation