Garmin
Descent™ Mk3 – 43 mm vs Descent™ Mk3i – 43 mm
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Which one fits you
Both need much the same wrist — roughly 45–61mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Descent™ Mk3 – 43 mm and Descent™ Mk3i – 43 mm share a near-identical 43mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
On the wrist the Descent™ Mk3i – 43 mm feels lighter (49.3g vs 53.5g, case only).
The Descent™ Mk3 – 43 mm is thicker than 72% of the 318 43mm watches we hold thickness for, the Descent™ Mk3i – 43 mm than 74% — so both sit higher than their widths suggest.
The Descent™ Mk3 – 43 mm is 0.2mm thinner and 4.2g heavier than the Descent™ Mk3i – 43 mm. Both are circular.
Descent™ Mk3 – 43 mm
Descent™ Mk3i – 43 mm
Case width
43mm
43mmsame
Lug-to-lug
43mm
43mmsame
Thickness
14.2mm
14.3mm+0.2mm
Weight
53.5g
49.3g−4.2g
Switch or add watches
Garmin
Descent™ Mk3 – 43 mm
Garmin
Descent™ Mk3i – 43 mm
Fit tool
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Your wrist
mm
≈ 146.9mm aroundDepth
How to Measure Wrist Width
1
Lay your arm flat on a table, palm facing up
2
Measure across the flat top of your wrist (not the circumference)
3
Measure at the point where you wear your watch — typically just below the wrist bone
⚠ Important
Wrist width ≠ circumference. We need the flat width across the top of your wrist where the watch sits, not how far around.
Garmin Descent™ Mk3 – 43 mm
Case 43.0mm · Lug-to-lug 43.0mm · Thickness 14.2mm · 54g
Balanced Fit
43mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 6.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 43mm, so you could go bigger.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.0mm spare each side
Comfortable, with visible skin either side.
- Off the wrist14.2mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (14.2mm case, back against the skin)
- How it seats~4.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist54g
Light enough to forget you have it on. (1.0g per mm of wrist)
Garmin Descent™ Mk3i – 43 mm
Case 43.0mm · Lug-to-lug 43.0mm · Thickness 14.3mm · 49g
Balanced Fit
43mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 6.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 43mm, so you could go bigger.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.0mm spare each side
Comfortable, with visible skin either side.
- Off the wrist14.3mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (14.3mm case, back against the skin)
- How it seats~4.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist49g
Light enough to forget you have it on. (0.9g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
Highlight
- Garmin Descent™ Mk3 – 43 mm43mm · 14.2mm thick
- Garmin Descent™ Mk3i – 43 mm43mm · 14.3mm thick
3D preview
Descent™ Mk3 – 43 mm vs Descent™ Mk3i – 43 mm on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Runtime for every power mode either watch publishes, 9 of them directly comparable.
Mk3 – 43 mmMk3i – 43 mm
Battery Saver
12 days12 daysSmartwatch
10 days10 daysExpedition GPS
10 days10 daysMax Battery GPS
44 hours44 hoursDive
30 hours30 hoursGPS Only
28 hours28 hoursAll Satellite Systems
20 hours20 hoursAll Satellite Systems + Multi-band
17 hours17 hoursDive with Air Integration
—15 hoursAll Satellite Systems + Music
6 hours6 hours
Specifications
The short version
7 key specs| Spec | GarminDescent™ Mk3 – 43 mm | GarminDescent™ Mk3i – 43 mm |
|---|---|---|
| Case Width | 43mm | 43mm |
| Thickness | 14.15mm | 14.3mm |
| Weight | 53.5g | 49.3g |
| Shape | Circular | Circular |
| Display type | AMOLED | AMOLED |
| 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 | 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 |
| Released | 2023 | 2023 |
Every specification
347 specs| Spec | Garmin Descent™ Mk3 – 43 mm | Garmin Descent™ Mk3i – 43 mm |
|---|---|---|
| Overview | ||
| Family | Garmin | Garmin |
| General | ||
| 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 | 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 |
| Display Size | 1.2” (30.4 mm) diameter | 1.2” (30.4 mm) diameter |
| Case material | fiber-reinforced polymer with stainless steel rear cover | fiber-reinforced polymer with titanium rear cover |
| Color display | Yes | Yes |
| Lens Material | sapphire crystal | sapphire crystal |
| Bezel Material | stainless steel | Diamond-like Carbon (DLC) coated titanium or bronze PVD coated titanium |
| Memory/History | 32 GB | 32 GB |
| Strap material | silicone | silicone |
| Charging method | Garmin proprietary clip charger | Garmin proprietary clip charger |
| Large font option | Yes | Yes |
| Display resolution | 390 x 390 pixels | 390 x 390 pixels |
| Leakproof inductive buttons | Yes | Yes |
| QuickFit® watch band compatible | yes (20 mm) | yes (20 mm) |
| Sensors | ||
| GPS | Yes | Yes |
| Compass | Yes | Yes |
| GLONASS | Yes | Yes |
| Galileo | Yes | Yes |
| Gyroscope | Yes | Yes |
| Thermometer | Yes | Yes |
| Depth sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| SatIQ™ Technology | Yes | Yes |
| Ambient light sensor | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | Yes | Yes |
| Garmin Elevate™ wrist heart rate monitor | Yes | Yes |
| Product Info | ||
| Main SKU | 010-02753-03 | 010-02753-13 |
| Product ID | 852183 | 852217 |
| Product Name | Descent™ Mk3 – 43 mm | Descent™ Mk3i – 43 mm |
| Product Variation | Stainless Steel with Fog Gray Silicone Band | Bronze PVD Titanium with French Gray Silicone Band |
| Release Date | — | 11/15/2023 |
| Clock Features | ||
| Timer | Yes | Yes |
| Stopwatch | Yes | Yes |
| Time/date | Yes | Yes |
| Alarm clock | Yes | Yes |
| GPS Time Sync | Yes | Yes |
| Sunrise/sunset times | Yes | Yes |
| Automatic daylight saving time | Yes | Yes |
| Diving Features | ||
| PO2 | Up to 2.0 with customizable deco PO2 setting | Up to 2.0 with customizable deco PO2 setting |
| Tides | Yes | Yes |
| Backlight | yes (configurable time and intensity; auto-on at depth) | yes (configurable time and intensity; auto-on at depth) |
| Gas mixes | Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. | Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. |
| APNEA mode | Yes | Yes |
| Deep Stops | yes (using custom gradient factors) | yes (using custom gradient factors) |
| Gauge mode | Yes | Yes |
| Pool APNEA | Yes | Yes |
| No fly time | Yes | Yes |
| Safety Stop | yes (customizable off/3min/5min) | yes (customizable off/3min/5min) |
| Dive planner | yes (basic NDL + multi-gas deco planner) | yes (basic NDL + multi-gas deco planner) |
| Multi-gas mode | Yes | Yes |
| Nitrox support | Yes | Yes |
| Trimix support | Yes | Yes |
| APNEA hunt mode | Yes | Yes |
| Alerts & alarms | Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure, gas consumption rate. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time | Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure, gas consumption rate. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time |
| Single-gas mode | Yes | Yes |
| 3-axis dive compass | yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading | yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading |
| Auto start/end dive | Yes | Yes |
| Decompression model | Bühlmann ZHL-16c with gradient factors | Bühlmann ZHL-16c with gradient factors |
| Missed Deco Lockout | yes (can be disabled prior to dive with user acknowledgement) | yes (can be disabled prior to dive with user acknowledgement) |
| Custom end-dive timeout | yes (20s to 10 m) | yes (20s to 10 m) |
| Custom dive data screens | Yes | Yes |
| Customizable conservatism | yes (low/medium/high or custom using gradient factors) | yes (low/medium/high or custom using gradient factors) |
| Surface diver status widget | yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) | yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) |
| Automatic altitude adjustment | Yes | Yes |
| Residual Tissue Loading Reset | yes (on the surface with user acknowledgement) | yes (on the surface with user acknowledgement) |
| Closed Circuit Rebreather (CCR) | Yes | Yes |
| Dive ascent/descent rate indicator | Yes | Yes |
| Dive activity maximum operating depth | 200 meters | 200 meters |
| Sync dive log to Garmin Dive™ Mobile app | Yes | Yes |
| Automatically saves dive entry and exit locations | Yes | Yes |
| Air integration | — | yes (via Subwave™) |
| Gas time remaining | — | Yes |
| Subwave™ Support | — | Yes |
| Gas consumption rate | — | Yes |
| Number of transmitters supported | — | 8 |
| Gaming Features | ||
| Gaming Activity | Yes | Yes |
| GameOn™ app compatible | Yes | Yes |
| Boating Features | ||
| Anchor Alarm | Yes | Yes |
| Countdown timer | Yes | Yes |
| Tack assist mode | Yes | Yes |
| Autopilot Control | Yes | Yes |
| Boat Data Streaming | CIQ | CIQ |
| Virtual starting line | Yes | Yes |
| Available Boating Profiles | Boating, Sailing, Sail Racing | Boating, Sailing, Sail Racing |
| Wearable trolling motor remote | Yes | Yes |
| Built-in barometer and tide tables | yes (downloadable tides) | yes (downloadable tides) |
| Cycling Features | ||
| Courses | Yes | Yes |
| Power guide | Yes | Yes |
| MTB Grit & Flow | Yes | Yes |
| Race an activity | Yes | Yes |
| Power meter compatible | Yes | Yes |
| Advanced cycling dynamics | Yes | Yes |
| Power curve and % FTP workouts | Yes | Yes |
| Compatible with Varia™ lights | Yes | Yes |
| FTP (Functional Threshold Power) | yes (with compatible accessory) | yes (with compatible accessory) |
| Compatible with Varia headlight camera | Yes | Yes |
| Speed and cadence sensor support (w/sensor) | Yes | Yes |
| Cycle Map (routable cycling-specific street map) | Yes | Yes |
| Bike lap and lap maximum power (with power sensor) | Yes | Yes |
| Compatible with Varia™ radar (rear-facing radar) | Yes | Yes |
| Compatible with Vector™ and Rally™ (power meters) | Yes | Yes |
| Compatible with Varia Vision™ (head-mounted display) | Yes | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | Yes |
| Golfing Features | ||
| PinPointer | Yes | Yes |
| Custom targets | Yes | Yes |
| Tempo Training | Yes | Yes |
| Virtual caddie | Yes | Yes |
| Full vector map | Yes | Yes |
| Handicap scoring | Yes | Yes |
| Tournament legal | Yes | Yes |
| Digital scorecard | Yes | Yes |
| Garmin AutoShot™ | Yes | Yes |
| PlaysLike distance | Yes | Yes |
| Round timer/odometer | Yes | Yes |
| Auto CourseView updates | Yes | Yes |
| Yardage to layups/doglegs | Yes | Yes |
| Hazards and course targets | Yes | Yes |
| Pairs with Garmin Golf app | Yes | Yes |
| Green View with manual pin position | Yes | Yes |
| Preloaded with 43,000 courses worldwide | Yes | Yes |
| Green Contours (with Garmin Golf membership) | Yes | Yes |
| CT10 Automatic club tracking compatible (requires accessory) | Yes | Yes |
| Yardage to F/M/B (distance to front, middle and back of green) | Yes | Yes |
| Stat tracking (strokes, putts per round, greens and fairways hit) | Yes | Yes |
| Wind speed and direction (requires connection to Garmin Golf app) | Yes | Yes |
| Touch-targeting (touch target on display to see the distance to any point) | Yes | Yes |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | automatic | automatic |
| Running Features | ||
| Hill score | Yes | Yes |
| Run workouts | Yes | Yes |
| Running power | Yes | Yes |
| Race predictor | Yes | Yes |
| Foot pod capable | Yes | Yes |
| Running dynamics | Yes | Yes |
| Lactate threshold | yes (with compatible accessory) | yes (with compatible accessory) |
| Grade-adjusted pace | Yes | Yes |
| Trail run auto climb | Yes | Yes |
| Performance condition | Yes | Yes |
| Run/Walk/Stand detection | Yes | Yes |
| Stride length (real time) | Yes | Yes |
| PacePro™ Pacing Strategies | Yes | Yes |
| Vertical oscillation and ratio | Yes | Yes |
| Ground contact time and balance | Yes | Yes |
| GPS-based distance, time and pace | Yes | Yes |
| Course- and weather-specific race predictor | Yes | Yes |
| Cadence (provides real-time number of steps per minute) | Yes | Yes |
| What You'll Love | ||
| Touchscreen | Yes | Yes |
| Display type | AMOLED | AMOLED |
| Water rating | Dive (200 meters) | Dive (200 meters) |
| Garmin Pay™ | Yes | Yes |
| Music storage | Yes | Yes |
| Multi-band GPS | Yes | Yes |
| Training status | yes (improved) | yes (improved) |
| Built-in mapping | Yes | Yes |
| Training readiness | Yes | Yes |
| Pulse Ox blood oxygen | Yes | Yes |
| Sleep score and insights | Yes | Yes |
| Battery life (smartwatch mode) | Up to 10 days (4 days always-on) | Up to 10 days (4 days always-on) |
| Activity Profiles | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing |
| Swim | Pool Swimming, Open Water Swimming | Pool Swimming, Open Water Swimming |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | Walking, Pilates, Yoga, Indoor Walking | Walking, Pilates, Yoga, Indoor Walking |
| Multisport | Swimming/Running, Triathlon | Swimming/Running, Triathlon |
| In the ring | Boxing, Mixed Martial Arts | Boxing, Mixed Martial Arts |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the Water | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Sailing Expedition, Whitewater | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Sailing Expedition, Whitewater |
| Racket sports | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Snow & winter | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Outdoor recreation | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Other activity profiles | Jumpmaster, Tactical, Inline Skating | Jumpmaster, Tactical, Inline Skating |
| Swimming Features | ||
| Pool swim workouts | Yes | Yes |
| Critical swim speed | Yes | Yes |
| Time and distance alerts | Yes | Yes |
| Auto rest (pool swim only) | Yes | Yes |
| Drill logging (pool swim only) | Yes | Yes |
| Pacing alerts (pool swim only) | Yes | Yes |
| Countdown start (pool swim only) | Yes | Yes |
| Underwater wrist-based heart rate | Yes | Yes |
| "Repeat on" rest timer (pool swim only) | Yes | Yes |
| Basic rest timer (up from 0) (pool swim only) | Yes | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | Yes | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | Yes | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | Yes | Yes |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus) | yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus) |
| Tactical Features | ||
| Kill switch | Yes | Yes |
| Stealth Mode | Yes | Yes |
| Ballistics solver | yes (unlock required) | yes (unlock required) |
| Night vision mode | Yes | Yes |
| XERO™ Locations | Yes | Yes |
| Dual grid coordinates | Yes | Yes |
| Outdoor Recreation | ||
| Tides | Yes | Yes |
| Up Ahead | Yes | Yes |
| Auto rest | Yes | Yes |
| TracBack® | Yes | Yes |
| Sight 'N Go | Yes | Yes |
| Tide glance | Yes | Yes |
| Back to start | Yes | Yes |
| Fish forecast | Yes | Yes |
| Explore Nearby | Yes | Yes |
| UltraTrac mode | Yes | Yes |
| Vertical speed | Yes | Yes |
| GPS coordinates | Yes | Yes |
| Reference point | Yes | Yes |
| Area calculation | yes (via Connect IQ™) | yes (via Connect IQ™) |
| Elevation profile | Yes | Yes |
| Projected waypoint | Yes | Yes |
| Total ascent/descent | Yes | Yes |
| Future elevation plot | Yes | Yes |
| NextFork™ navigation | Yes | Yes |
| Distance to destination | Yes | Yes |
| Expedition GPS Activity | Yes | Yes |
| Sun and moon information | Yes | Yes |
| Point-to-point navigation | Yes | Yes |
| Preloaded ski resort maps | Yes | Yes |
| ClimbPro™ Ascent Planner | Yes | Yes |
| Rest Timer (Ultra Run only) | Yes | Yes |
| Preloaded road and trail maps | Yes | Yes |
| Bread crumb trail in real time | Yes | Yes |
| Downloadable cartography support | Yes | Yes |
| Barometric trend indicator with Storm Alert | Yes | Yes |
| Daily Smart Features | ||
| Stocks | Yes | Yes |
| Calendar | Yes | Yes |
| Connectivity | Bluetooth®, ANT+®, Wi-Fi®, Subwave™ | BLUETOOTH®, ANT+®, Wi-Fi®, Subwave™ |
| Garmin Share | Yes | Yes |
| Find My Phone | Yes | Yes |
| Find My Watch | Yes | Yes |
| VIRB® Remote | Yes | Yes |
| Morning report | Yes | Yes |
| Red shift mode | Yes | Yes |
| Weather forecasts | Yes | Yes |
| Smart Notifications | Yes | Yes |
| Smart trainer control | Yes | Yes |
| Smartphone compatibility | iPhone®, Android™ | iPhone®, Android™ |
| Controls smartphone music | Yes | Yes |
| On-device Connect IQ™ Store | Yes | Yes |
| Plays and controls watch music | Yes | Yes |
| Find My Phone during GPS activity | Yes | Yes |
| Pairs with Garmin Connect™ Mobile | Yes | Yes |
| Compatible with Garmin Messenger app | Yes | Yes |
| Battery saver (customizable low power watch) | Yes | Yes |
| Realtime settings sync with Garmin Connect™ mobile | Yes | Yes |
| View images from notifications on watch (Android™ only) | Yes | Yes |
| Text response/reject phone call with text (Android™ only) | Yes | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | Yes | Yes |
| Activity Tracking Features | ||
| TrueUp™ | Yes | Yes |
| Move IQ™ | Yes | Yes |
| Step counter | Yes | Yes |
| Floors climbed | Yes | Yes |
| Calories burned | Yes | Yes |
| Distance traveled | Yes | Yes |
| Intensity minutes | Yes | Yes |
| Automatic rep counting | Yes | Yes |
| Garmin Connect™ Challenges app | yes (optional Connect IQ app) | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | Yes | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | Yes |
| Workout and Training Plans | ||
| HIIT workouts | Yes | Yes |
| Yoga workouts | Yes | Yes |
| Cardio workouts | Yes | Yes |
| Pilates workouts | Yes | Yes |
| Strength workouts | Yes | Yes |
| Garmin Cycling Coach | Yes | Yes |
| Garmin Running Coach | Yes | Yes |
| Garmin Running Coach Experts | Yes | Yes |
| On-screen workout animations | Yes | Yes |
| On-screen workout muscle maps | Yes | Yes |
| Daily Suggested Workout - Cycling | Yes | Yes |
| Daily Suggested Workout - Running | Yes | Yes |
| Garmin Coach - Prebuilt Cycling Plans | Yes | Yes |
| Health & Wellness Monitoring | ||
| Sleep | yes (advanced) | yes (advanced) |
| Hydration | yes (in Garmin Connect™) | yes (in Garmin Connect™) |
| Breathwork | Yes | Yes |
| Fitness age | yes (in app) | yes (in app) |
| Nap detection | Yes | Yes |
| All-day stress | Yes | Yes |
| Women's health | yes (in Garmin Connect™) | yes (in Garmin Connect™) |
| Jet lag adviser | Yes | Yes |
| Respiration rate | Yes | Yes |
| Skin temperature | Yes | Yes |
| Resting heart rate | Yes | Yes |
| Abnormal heart rate alerts | yes (high and low) | yes (high and low) |
| Relaxation breathing timer | Yes | Yes |
| Body Battery™ energy monitor | Yes | Yes |
| Wrist-based heart rate (constant, every second) | Yes | Yes |
| Health snapshot | — | Yes |
| Safety and Tracking Features | ||
| Assistance | Yes | Yes |
| Live Event Sharing | Yes | Yes |
| Incident Detection during select activities | Yes | Yes |
| Incident detection alert on phone for wearables | Yes | Yes |
| Kid Activity Tracking Features | ||
| Toe-to-Toe™ Challenges app | yes (optional Connect IQ Toe-to-Toe™ Challenges app) | yes (optional Connect IQ Toe-to-Toe™ Challenges app) |
| Training, Planning and Analysis Features | ||
| % HRR | Yes | Yes |
| % HR max | Yes | Yes |
| HR zones | Yes | Yes |
| HR alerts | Yes | Yes |
| Shortcuts | Yes | Yes |
| HRV status | Yes | Yes |
| Load ratio | Yes | Yes |
| Manual lap | Yes | Yes |
| Rest timer | Yes | Yes |
| Auto max HR | Yes | Yes |
| Auto scroll | Yes | Yes |
| Finish time | Yes | Yes |
| HR calories | Yes | Yes |
| Voice alerts | Yes | Yes |
| Custom alerts | Yes | Yes |
| Physio TrueUp | Yes | Yes |
| Recovery time | Yes | Yes |
| Training load | Yes | Yes |
| VO2 Max (Run) | Yes | Yes |
| Course guidance | Yes | Yes |
| Endurance score | Yes | Yes |
| Training effect | Yes | Yes |
| Virtual Partner | Yes | Yes |
| Race an Activity | Yes | Yes |
| Realtime stamina | Yes | Yes |
| Advanced workouts | Yes | Yes |
| Interval training | Yes | Yes |
| Race glance/widget | Yes | Yes |
| Training load focus | Yes | Yes |
| VO2 Max (Trail Run) | Yes | Yes |
| Garmin Live Segments | Yes | Yes |
| Strava Live Segments | Yes | Yes |
| GPS speed and distance | Yes | Yes |
| Improved recovery time | Yes | Yes |
| Configurable lap alerts | Yes | Yes |
| Customizable data pages | Yes | Yes |
| Unified training status | Yes | Yes |
| Touch and/or button lock | Yes | Yes |
| Activity history on watch | Yes | Yes |
| Downloadable training plans | Yes | Yes |
| Training effect (anaerobic) | Yes | Yes |
| Manual multisport activities | Yes | Yes |
| HRM running pace and distance | Yes | Yes |
| Heat and altitude acclimation | Yes | Yes |
| Customizable activity profiles | Yes | Yes |
| Trendline™ Popularity Routing | Yes | Yes |
| Auto Pause® automatic timer halt | Yes | Yes |
| Respiration rate (during exercise) | yes (with compatible accessory) | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | Yes | Yes |
| Primary benefit (Training Effect labels) | Yes | Yes |
| Round-trip course creator (running/cycling) | Yes | Yes |
| Power Modes - customizable in-activity battery settings | Yes | Yes |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | Yes | Yes |
| HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) | yes (with compatible accessory) | yes (with compatible accessory) |
Wrist Fit
Garmin Descent™ Mk3 – 43 mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Garmin Descent™ Mk3i – 43 mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Frequently Asked Questions
Is the Garmin Descent™ Mk3 – 43 mm bigger than the Garmin Descent™ Mk3i – 43 mm?
Both have a 43mm case. Compare their thickness and lug-to-lug above to judge wrist presence.
Which fits a smaller wrist better, the Garmin Descent™ Mk3 – 43 mm or the Garmin Descent™ Mk3i – 43 mm?
The Garmin Descent™ Mk3 – 43 mm suits wrists around 45–61mm wide, and the Garmin Descent™ Mk3i – 43 mm around 45–61mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Descent™ Mk3 – 43 mm and Garmin Descent™ Mk3i – 43 mm side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.