The Garmin D2 family of premium GPS aviator watches was the first to put true global flight navigation capability on the wrists of forward-looking pilots and flying enthusiasts. Compare the current Garmin D2 aviation watches below.

ProductD2 Delta S
d2 delta s
D2 Delta
d2 delta
D2 Delta PX
d2 delta px
D2 Air
d2 air
Lens Materialdomed sapphire crystaldomed sapphire crystaldomed sapphire crystalCorning Gorilla Glass 3
Bezel Materialstainless steeltitaniumtitaniumstainless steel
Case Materialfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with metal rear cover
QuickFit watch band compatible✅ (20mm)✅ (22mm)✅ (26mm)
Quick release bands✅ (20mm, Industry standard)
Strap materialsilicone or leathersilicone or leathersilicone or leathersilicone or leather
Physical size 42 x 42 x 15.4 mm47 x 47 x 15.8 mm51 x 51 x 17.5 mm43.2 x 43.2 x 12.4 mm
Fits wrists with a circumference of 125-190 mm
Touchscreen
Weight65 g76 g87 g46.3g
Water rating 10 ATM10 ATM10 ATM5 ATM
Display typesunlight-visible, transflective memory-in-pixel (MIP)sunlight-visible, transflective memory-in-pixel (MIP)sunlight-visible, transflective memory-in-pixel (MIP)AMOLED; optional always-on mode
Display size 1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter
Display resolution 240 x 240 pixels240 x 240 pixels240 x 240 pixels390 x 390 pixels
Color display
Battery life Smartwatch mode: Up to 7 days
GPS mode: Up to 11 hours
GPS + Music: Up to 4.5 hours
UltraTrac™ mode: Up to 25 hours
Smartwatch mode: Up to 12 days
GPS mode: Up to 18 hours
GPS + Music: Up to 8 hours
UltraTrac™ mode: Up to 42 hours
Smartwatch mode: Up to 20 days
GPS mode: Up to 32 hours
GPS + SPO2: Up to 18 hours
GPS + Music: Up to 13 hours
UltraTrac™ mode: Up to 70 hours
Smartwatch mode:  Up to 5 days
GPS mode with music:  Up to 6 hours
GPS mode without music: Up to 20 hours
GPS+SPO2: Up to 10 hours
Memory/History 16 GB16 GB16 GB7 timed activities, 14 days of activity tracking data
Clock FeaturesTime/Date in Zulu/UTC, 12/24h, day/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset timesTime/Date in Zulu/UTC, 12/24h, day/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset timesTime/Date in Zulu/UTC, 12/24h, day/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset timesTime/Date in Zulu/UTC, 12/24h, day/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset times
SensorsSensorsSensorsSensorsSensors
GPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/Galileo
Garmin Elevate wrist heart rate monitor
Barometric altimeter
Compass
Gyroscope
Accelerometer
Thermometer✅ (with a separately sold accessory)
Pulse Ox✅ (with acclimation)
Daily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart Features
ConnectivityBluetooth®, ANT+®, Wi-Fi®Bluetooth®, ANT+®, Wi-Fi®Bluetooth®, ANT+®, Wi-Fi®Bluetooth®, ANT+®, Wi-Fi®
Connect IQ (downloadable watch faces, data fields, widgets and apps)
Smart notifications
Text response/reject phone call with text (Android only)
Calendar
Weather
Controls smartphone music
Plays and controls watch music
Music storage Up to 500 songsUp to 500 songsUp to 500 songsUp to 500 songs
Find my Phone
Find my Watch
VIRB camera remote
Smartphone compatibilityiPhone®, Android™iPhone®, Android™iPhone®, Android™iPhone®, Android™
Compatible with Garmin Connect Mobile
Garmin Pay
Aviation FeaturesAviation FeaturesAviation FeaturesAviation FeaturesAviation Features
World wide airport databases
Altimeter with adjustable baro settings
3-axis compass with HSI (horizontal situation indicator)
Multiple time zones with Zulu/UTC
Wirelessly receive flight plans from Garmin Pilot
NEXRAD on moving map
Moving map with aviation airports, navaids, roads, bodies of water and more
Waypoints information page
Worldwide NAVAID and intersection database(s)
Connext avionics connectivity
In-flight Pulse Ox
Activity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking Features
Step counter
Move Bar (displays on device after a period inactivity; Walk for a couple of minuets to rest it)
Auto goal (learns your activity level and assigns a daily step goal)
Sleep monitoring (monitors total sleep and periods of movements or restful sleep)
Calories burned
Floors climbed
Distance traveled
Intensity minuets
TrueUp
Move IQ
Fitness Age ✅ (in app)✅ (in app)✅ (in app)✅ (in app)
All-day stress tracking
Fitness Equipment/ GymFitness Equipment/ GymFitness Equipment/ GymFitness Equipment/ GymFitness Equipment/ Gym
Available gym activity profilesStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Yoga
Cardio workouts
Strength workouts
Yoga workouts
Pilates workouts
On-screen workout animations
Automatic rep Counting
Training, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis Features
GPS speed and distance
Customizable data pages
Customizable activity profiles
Auto pause
Interval training
Advanced workouts
Downloadable training plans
Auto lap
Manual Lap
Configurable lap alerts
V02 Max
Training status (lets you see if your training effectively by tracking your training history and fitness)
Training load (your total training load for the last 7 days calculated from estimated EPOC)
Training effect (aerobic)
Training effect (anaerobic)
Customizable alerts
Audio prompts
Finish time
Virtual partner
Race an activity
Auto multisport activities
Manual multisport activities
Course guidance
Segments (Live, Garmin)
Strava features (Beacon, live segments)
Live tracking
Group Livetrack
Round-trip course creator (running/cycling)
Trendline popularity Routing
Touch and/or button lock
Hot keys
Auto scroll
Activity history on watch
Physio TrueUp
Heart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate Features
HR zones
HR alerts
HR calories
% HR max
% HRR
Recovery time
Auto max HR
HRV stress test (measures your heart rate variability while standing still, for 3 minuets, to provide you with an estimated stress level; the scale of this 1 to 100; low scores indicate lower stress levels)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Records heart rate while swimming ✅ (with HRM-Tri™ and HRM-Swim™)✅ (with HRM-Tri™ and HRM-Swim™)✅ (with HRM-Tri™ and HRM-Swim™)
HR broadcast (broadcast HR data over ANT+ to paired devices)
Running FeaturesRunning FeaturesRunning FeaturesRunning FeaturesRunning Features
Available run profiles Running, Treadmill Running, Trail RunningRunning, Treadmill Running, Trail RunningRunning, Treadmill Running, Trail RunningRunning, Treadmill Running, Trail Running
GPS-based distance, time and pace
Running dynamics✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Vertical oscillations and ratio (the degree of ‘bounce’ in your running motion and the cost-benefit ratio with stride length)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Ground contact time and balance (shows how much time, in the running motion, your foot is on the ground rather than in flight and lets you check your running symmetry)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Stride length (real time)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
cadence (provides real-time number of steps per minuet)
Performance condition (after running 6-20 minuets, compares your real-time condition to your average fitness level)
Lactate threshold (through analysis of your pace and heart rate, estimates the point where your muscles start to rapidly fatigue)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Run workouts
Race predictor
Foot pod capable
Golfing FeaturesGolfing FeaturesGolfing FeaturesGolfing FeaturesGolfing Features
Yardage to F/M/B (distance to front, middle and back)
Yardage to layups/doglegs
Measures shot distance (calculates exact yardage for shots from anywhere on course)AutomaticAutomaticAutomaticAutomatic
Digital scorecard
Stat tracking (strokes, putts per round, greens and fairways hits)
Garmin Autoshot
Auto CourseView updates
Green View with manual pin position
Hazards and course targets
TrueSwing compatible
Round timer/odometer
Outdoor Recreation FeaturesOutdoor Recreation FeaturesOutdoor Recreation FeaturesOutdoor Recreation FeaturesOutdoor Recreation Features
Available outdoor recreation profilesHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticaHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticaHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticaSkiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing
Point-to-point navigation
Bread crumb trail in real time
Back to start
TracBack
UltraTrac mode
Around me mode
Elevation profile
Distance to destination
Barometric trend indicator with storm alert
ClimbPro ascent planner
Trail run auto climb
Vertical speed
Total ascent/decent
Future elevation plot
Preloaded topographical maps
Downloadable cartography support
Compatible with BaseCamp
GPS coordinates
Projected waypoint
Sight ‘N Go✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Area calculation ✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Hunt/fish calendar✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Sun and moon Information Dual grid coordinates
XERO Locations
Cycling FeaturesCycling FeaturesCycling FeaturesCycling FeaturesCycling Features
Available cycling profilesBiking, Indoor Biking, TriathlonBiking, Indoor Biking, TriathlonBiking, Indoor Biking, TriathlonBiking, Indoor Biking
Courses
Bike lap and lap maximum power (with power sensor)
Race an activity
Time/distance alerts (triggers alarm when you reach goal)
FTP (Functional Threshold Power)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Garmin cycle map (routable cycling-specific street map)
Compatible with vector (power meter)
Power meter compatible (displays power data from compatible third-party ANT+ -enable power meters)
Compatible with varia vision (head-mounted displays)
Compatible with varia radar (rear-facing radar)
Compatible with Varia lights
Speed and cadence sensor support (with sensor)✅ (ANT+® and Bluetooth® Smart sensors)✅ (ANT+® and Bluetooth® Smart sensors)✅ (ANT+® and Bluetooth® Smart sensors)
Swimming FeaturesSwimming FeaturesSwimming FeaturesSwimming FeaturesSwimming Features
Available swim profilesPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming
Pool swim metrics (lengths, distance, pace, stroke, count/rate, calories)
Stroke type detection (freestyle, backstroke, breaststroke, butterfly)
Swim efficiency (SWOLF)
Drill logging
Pool swim workouts
Open water swim metrics (distance, pace, stroke count/rate, calories)
Heart rate (real-time during rests, interval and session stats during rests, and automatic heart rate downloadable post-swim)✅  (with HRM-Tri™ and HRM-Swim™)✅  (with HRM-Tri™ and HRM-Swim™)✅  (with HRM-Tri™ and HRM-Swim™)
Underwater wrist-based heart rate
Time and distance alerts