Description

A Premium Dive Computer You Can Wear Every Day

The Garmin Descent Mk3i brings serious dive-computer capability into a premium multisport smartwatch designed to go from the dive boat to everyday life without changing devices.

Built for recreational, technical, freediving, and CCR divers, the Mk3i combines a bright AMOLED touchscreen with traditional dive buttons, a rugged titanium-accented case, sapphire crystal lens, advanced decompression features, optional air integration, underwater communication capabilities, GPS navigation, health monitoring, training tools, and smartwatch functionality.

Whether you are making a recreational nitrox dive, running multiple gases during decompression, diving trimix, using a closed-circuit rebreather, or simply tracking your next workout, the Descent Mk3i is designed to handle it.

Air Integration with Descent T2

Pair the Descent Mk3i with compatible Garmin Descent T2 transceivers to monitor cylinder pressure directly from your wrist.

Garmin’s SubWave sonar network allows the Mk3i to monitor tank pressure information and other data from compatible T2-equipped divers.

Depending on configuration, the Mk3i can monitor multiple cylinders or members of a dive team, making it useful for:

• Recreational air integration
• Doubles
• Stage and decompression cylinders
• Technical diving
• Dive team monitoring

Descent T2 transceivers are sold separately.

SubWave Underwater Communication

When paired with compatible Descent T2 transceivers, the Mk3i supports Garmin’s SubWave technology for enhanced underwater connectivity.

Compatible divers can use features such as:

• Diver-to-diver preset messaging
• Dive group tracking
• Tank pressure monitoring
• Depth monitoring
• Diver Assistance features

These tools add another layer of situational awareness while still complementing — not replacing — traditional dive communication and safety procedures.

Built for Recreational and Technical Diving

The Descent Mk3i supports a wide range of dive configurations, including:

• Single-gas diving
• Multi-gas diving
• Air
• Nitrox
• Trimix
• Gauge mode
• Closed-circuit rebreather diving
• Apnea
• Apnea hunt

Customizable data screens allow divers to configure the information they want to see underwater.

A large-font option can also simplify the dive display for quick viewing.

200-Meter Dive Rating

The Mk3i is built around a 200-meter dive-rated case with leakproof inductive buttons designed to remain fully operational at depth.

A scratch-resistant sapphire crystal lens protects the AMOLED display from the punishment associated with regular dive use.

Bright AMOLED Touchscreen

The high-resolution AMOLED display provides excellent visibility both above and below the surface.

Touchscreen operation makes navigating everyday smartwatch features intuitive, while physical buttons remain available for reliable operation during dives.

43mm Display

• 1.2-inch AMOLED display
• 390 x 390 pixel resolution

51mm Display

• 1.4-inch AMOLED display
• 454 x 454 pixel resolution

Built-In LED Flashlight — 51mm Model

The 51mm Descent Mk3i includes an integrated LED flashlight for additional visibility above or below the water.

Multiple brightness levels and strobe functions make it useful for:

• Equipment checks
• Low-light environments
• Surface signaling
• Dive boat use
• Backup illumination
• Everyday use

The LED flashlight is available on the 51mm Mk3i only.

DiveView Maps and GPS

Garmin’s built-in mapping and GPS functionality help you navigate both before and after the dive.

DiveView mapping provides access to thousands of dive locations, while multi-band GPS can record precise surface entry and exit locations.

The Descent Mk3i also includes Garmin’s broader mapping and navigation ecosystem for hiking, boating, travel, and outdoor activities.

Dive Readiness

Garmin’s Dive Readiness feature uses lifestyle and recovery information to provide additional context before a dive.

Factors such as:

• Sleep
• Stress
• Exercise
• Recovery
• Travel
• Overall training load

can contribute to a readiness score.

This information is intended as an additional planning tool rather than a replacement for personal judgment, proper training, or established dive-safety practices.

More Than a Dive Computer

Above the water, the Descent Mk3i becomes a full-featured Garmin multisport smartwatch.

Features include:

• Multi-band GPS
• Heart-rate monitoring
• Pulse Ox
• Sleep tracking
• Training readiness
• Training status
• Sports and activity profiles
• Music storage
• Garmin Pay
• Smartphone notifications
• Built-in mapping
• Health and wellness tracking
• 32 GB internal memory

For divers who also run, hike, cycle, train, travel, or simply want a premium everyday smartwatch, the Mk3i eliminates the need to maintain separate devices.

Choose Your Configuration

43mm — Carbon Gray DLC Titanium / Black Silicone Band

A compact version of the Mk3i for divers who prefer a smaller watch profile.

Case Size: 43mm
Bezel: Carbon Gray DLC-Coated Titanium
Band: Black Silicone
QuickFit Size: 20mm
MSRP: $1,399.99

43mm — Bronze Titanium / French Gray Silicone Band

The same compact 43mm Mk3i with a distinctive bronze titanium bezel and French Gray silicone band.

Case Size: 43mm
Bezel: Bronze PVD-Coated Titanium
Band: French Gray Silicone
QuickFit Size: 20mm
MSRP: $1,399.99

51mm — Carbon Gray DLC Titanium / Black Silicone Band

The larger Mk3i provides a larger 1.4-inch display, substantially greater battery life, and an integrated LED flashlight.

Case Size: 51mm
Bezel: Carbon Gray DLC-Coated Titanium
Band: Black Silicone
QuickFit Size: 26mm
MSRP: $1,599.99

Battery Life

43mm Mk3i

• Smartwatch Mode: Up to 10 days
• Always-On Smartwatch Mode: Up to 4 days
• Dive Mode: Up to 30 hours
• Dive Mode with Air Integration: Up to 15 hours
• GPS Only: Up to 28 hours

51mm Mk3i

• Smartwatch Mode: Up to 25 days
• Always-On Smartwatch Mode: Up to 10 days
• Dive Mode: Up to 66 hours
• Dive Mode with Air Integration: Up to 40 hours
• GPS Only: Up to 76 hours

Actual battery life varies according to enabled features and usage.

Key Features

• Advanced watch-style dive computer
• Available in 43mm and 51mm sizes
• Air integration with optional Descent T2 transceivers
• SubWave underwater sonar networking
• Diver-to-diver messaging capability
• Dive group monitoring
• Bright AMOLED touchscreen
• Sapphire crystal lens
• Titanium bezel
• 200-meter dive rating
• Leakproof inductive buttons
• Multi-gas capability
• Nitrox and trimix support
• Closed-circuit rebreather mode
• Gauge mode
• Freediving and apnea modes
• DiveView mapping
• Multi-band GPS
• Dive Readiness
• Extensive Garmin sports and fitness features
• Health and wellness tracking
• Garmin Pay
• Music storage
• Smartphone connectivity
• 32 GB memory
• QuickFit-compatible bands
• Integrated LED flashlight on 51mm model

Specifications

43mm Mk3i

Physical Size: 43 x 43 x 14.3 mm
Display: 1.2 in. / 30.4 mm
Resolution: 390 x 390 pixels
Weight with Silicone Band: Approx. 68.3 g
Lens: Sapphire Crystal
Bezel: Titanium
Band Compatibility: QuickFit 20mm
Water Rating: Dive Rated to 200m
Memory: 32 GB

51mm Mk3i

Physical Size: 51 x 51 x 16.4 mm
Display: 1.4 in. / 35.56 mm
Resolution: 454 x 454 pixels
Weight with Silicone Band: Approx. 105.6 g
Lens: Sapphire Crystal
Bezel: Titanium
Band Compatibility: QuickFit 26mm
Water Rating: Dive Rated to 200m
Memory: 32 GB
Flashlight: Integrated LED