Garmin Descent Mk3i 51 mm Dive Computer, DLC Titanium

1 / 6

Product guide

Garmin Descent Mk3i 51 mm Dive Computer, DLC Titanium

Titanium: Garmin Descent Mk3i is a 51 mm watch-style dive computer with a listed 1.4-inch AMOLED display and a 200-meter dive-rated case. Its multiple dive modes, dive logging, maps and optional-transceiver functions are aimed at divers who want navigation and fitness features in one wrist device.

At a glance

Multiple dive modes cover recreational and technical scuba diving as well as freediving, according to the listing.
Dive log storage is listed for up to 200 dives, with dive records also available through the Garmin Dive app on a compatible smartphone.
DiveView maps include bathymetric contours and more than 4,000 dive sites. The listing says GPS tracking does not work underwater.
SubWave preset diver messages require software v.15.70 or later. Tank-pressure and depth monitoring for up to eight divers requires a separately sold Descent T2 transceiver and is listed within a 10-meter range.
The built-in LED flashlight offers red or white light, variable intensities and strobe modes.
Health features listed include wrist-based heart rate, sleep monitoring, respiration tracking and Pulse Ox. Pulse Ox is not available in all countries and the device is not a medical device.

Price

$1,499.99Save 17%

Reference price: ~~$1,799.99~~

Price checked: Nov 14, 2026

View offer

Often bought together

Garmin Descent™ T2 Transceiver, Subwave™ Wireless Communication | Monitor Up to 8 Tanks When Under Water, Pair with Your Compatible Air-Integrated Descent™ Dive Computer (Sold Separately)

$499.99

IPG for Garmin Descent Mk3i (Case Dimention:51 mm) Hydrogel Screen Protector (2 Units) Invisible HD Clear Film Anti Scratch Guard-Smooth/Self-Healing/Bubble for Mk3i/51 mm

$14.95

Pros and cons

Pros

Combines dive-computer modes, dive logging, mapping, GPS and general fitness features in a watch-style device.
The listed sapphire lens and titanium bezel offer a specified material and lens choice for a dive-focused watch.
Built-in flashlight offers red or white light, with adjustable intensity and strobe options.
Compatible with Android and iPhone, according to the listing.

Cons

Advanced group tank-pressure and depth monitoring depends on buying a compatible Descent T2 transceiver separately.
The 51 mm case and listed weight of 165.9 g may be substantial for buyers seeking a smaller or lighter watch.

Technical specifications

12 specifications

Identity
Brand	Garmin
Model	Descent™ Mk3i – 51 mm

Display and video
Screen size	1.4 inches
Screen technology listed	AMOLED

Connectivity and controls
Wireless connection listed	Bluetooth, USB
Control methods listed	Push Button

Power and battery
Battery type	Lithium Polymer

Dimensions and installation
Form factor	Round
Dimensions listed	2.01 x 2.01 x 0.63 inches
Weight listed	165.9 g

Materials and protection
Water resistance listed	Waterproof

Computing specifications
Storage listed	32 GB

What to know before buying

Listing details to confirm

The listing calls the case 200-meter dive-rated, while its details also say “Waterproof” and give a separate “IP68 or higher” rating. Treat these as distinct, unconfirmed listing descriptions rather than interchangeable standards. GPS tracking does not work underwater. SubWave messages require software v.15.70 or later, and group tank-pressure and depth monitoring requires the separately sold Descent T2. Health metrics are estimates, not medical measurements, and Pulse Ox availability varies by country.

What’s in the box

Included

Descent Mk3i 51 mm, carbon gray DLC titanium with black silicone band
Black extra-long adjustment strap
USB-C to clip charging/data cable
Documentation

Who is it for?

A good fit for

Divers wanting a wrist-mounted computer with multiple dive modes, an on-watch log and dive-site maps.
Divers who may use the separately sold T2 transceiver for group tank-pressure and depth monitoring.
Buyers who also want GPS, fitness apps and health tracking outside diving.

Less suited to

Buyers seeking a lightweight or compact watch, given the listed 51 mm case and 165.9 g weight.
Divers who need underwater GPS tracking or expect T2-based group monitoring without purchasing the transceiver.

Garmin Descent Mk3i 51 mm Dive Computer, DLC Titanium · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 139 ratings

5 stars89%89%
4 stars2%2%
3 stars2%2%
2 stars4%4%
1 star3%3%

Customer feedback reports positive impressions of functionality, performance and battery life, alongside favorable value opinions. That praise may matter to divers using the listed dive modes and logging features, but it does not independently establish performance or battery duration. Durability feedback is mixed, including concerns about long-term reliability, so buyers prioritizing long service life should weigh that uncertainty.

Positive themes

Customer feedback praises functionality and performance.
Customers report positive impressions of battery life and value.

Mixed feedback

Durability feedback is mixed, with some customers expressing concerns about long-term reliability.

Frequently asked questions

Can the Descent Mk3i track GPS underwater?

No. The listing specifically says GPS tracking does not work underwater. It describes GPS and ABC sensors, including an underwater compass, for navigation around a dive.

Does it monitor tank pressure for a group without extra equipment?

No. Monitoring tank pressures and depth for up to eight divers requires a separately sold Descent T2 transceiver and is listed within a 10-meter range.

What is included in the listed package?

The package details list the Descent Mk3i 51 mm watch, a black extra-long adjustment strap, a USB-C to clip charging/data cable and documentation.

Is Pulse Ox available everywhere, and is the watch a medical device?

The listing says Pulse Ox is not available in all countries and that the device is not a medical device. Its health data is described as an estimate.