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 Mach 1
D2 Air
d2 air
D2 Air X10
Lens Materialdomed sapphire crystaldomed sapphire crystaldomed sapphire crystalsapphire crystalCorning Gorilla Glass 3Corning Gorilla Glass 3
Bezel Materialstainless steeltitaniumtitaniumtitaniumstainless steelstainless steel
Case Materialfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with titanium rear coverfiber-reinforced polymer with metal rear coverfiber-reinforced polymer with stainless-steel rear cover
QuickFit watch band compatible✅ (20mm)✅ (22mm)✅ (26mm)✅ (22mm)
Quick release bands✅ (20mm, Industry standard)✅ (20mm, Industry standard)
Strap materialsilicone or leathersilicone or leathersilicone or leatherLeather version: Italian leather & silicone
Titanium version: Titanium & silicone
silicone or leathersilicone
Physical size 42 x 42 x 15.4 mm47 x 47 x 15.8 mm51 x 51 x 17.5 mm47 x 47 x 14.5 mm
Fits wrists with the following circumference: 
Silicone Band: 125-208 mm
Leather Band: 132-210 mm
Titanium Band: 132-215 mm
43.2 x 43.2 x 12.4 mm
Fits wrists with a circumference of 125-190 mm
43.6 x 43.6 x 12.6 mm
Fits wrists with a circumference of 125-190 mm
Touchscreen
Weight65 g76 g87 g70 g (case only: 47 g)46.3g51.0 g
Water rating 10 ATM10 ATM10 ATM10 ATM5 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 modeAMOLED; optional always-on modeAMOLED; optional always-on mode
Display size 1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.3″ (33.0 mm) diameter1.2″ (30.4 mm) diameter1.3″ (33.0 mm) diameter
Display resolution 240 x 240 pixels240 x 240 pixels240 x 240 pixels416 x 416 pixels390 x 390 pixels416 x 416 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 11 days (4 days always-on)
Battery Saver Smartwatch mode: Up to 21 days
GPS only: Up to 42 hours (30 hours always-on )
All satellite systems: Up to 32 hours (24 hours always-on)
All satellite systems with multi-band: Up to 20 hours (15 hours always-on)
All satellite systems with music: Up to 10 hours (9 hours always-on)
Max battery GPS: Up to 75 hours
Expedition GPS: Up to 14 days
Fly activity (GPS + SpO2): Up to 24 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
Smartwatch mode: Up to 7 days
Battery Saver Smartwatch Mode: Up to 10 days
GPS mode with music: Up to 8 hours
GPS mode without music: Up to 24 hours
GPS + SPO2: Up to 20 hours
See details
Memory/History 16 GB16 GB16 GB32 GB7 timed activities, 14 days of activity tracking data200 hours of activity 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 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
Sensors
GPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/GalileoGPS/GLONASS/Galileo
Multi-Frequency Positioning
Garmin Elevate wrist heart rate monitor
Barometric altimeter
Compass
Gyroscope
Accelerometer
Thermometer✅ (with a separately sold accessory)✅ (with a separately sold accessory)
Ambient Light Sensor
Pulse Ox✅ (with acclimation)
Daily Smart Features
ConnectivityBluetooth®, ANT+®, Wi-Fi®Bluetooth®, ANT+®, Wi-Fi®Bluetooth®, 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)
On-Device Connect IQ Store
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 2,000 songsUp to 500 songsUp to 650 songs
Find my Phone
Find my Watch
VIRB camera remote
Smartphone compatibilityiPhone®, Android™iPhone®, Android™iPhone®, Android™iPhone®, Android™iPhone®, Android™iPhone®, Android™
Compatible with Garmin Connect Mobile
Garmin Pay
Aviation 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
Aviation alerts
MOS & Meteogram
Fly Activity Emergency Mode
Density Altitude Calculator
METAR (Meteorological Aerodrome Report)
TAF (Terminal Aerodrome Forecast)
Tactical Features
Stealth Mode
Dual Grid Coordinates
Kill Switch
Activity 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 minutes
TrueUp
Move IQ
Fitness Age ✅ (in app)✅ (in app)✅ (in app)✅ (in app)
All-day stress tracking
Fitness 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, Cardio, HIIT and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates, YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, YogaStrength, HIIT, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Breathwork, Pilates, Yoga
Cardio workouts
Strength workouts
HIIT workouts
Yoga workouts
Pilates workouts
On-screen workout animations
On-screen workout muscle maps
Automatic rep Counting
Training, Planning and Analysis Features
GPS speed and distance
Customizable data pages
Customizable activity profiles
Auto pause
Interval training
Advanced workouts
Downloadable training plans
Power Modes – Customizable in-activity battery settings
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 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)✅ (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™)✅ (with HRM-Tri™ and HRM-Swim™)
HR broadcast (broadcast HR data over ANT+ to paired devices)
Running Features
Available run profiles Running, Treadmill Running, Trail RunningRunning, Treadmill Running, Trail RunningRunning, Treadmill Running, Trail RunningRunning, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running, Ultra RunningRunning, Treadmill Running, Trail RunningRunning, Treadmill Running, Indoor Track Running
GPS-based distance, time and pace
Running dynamics✅ (with compatible accessory)✅ (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)✅ (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)✅ (with compatible accessory)
Stride length (real time)✅ (with compatible accessory)✅ (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)✅ (with compatible accessory)
Run workouts
Trail run auto climb
Race predictor
Foot pod capable
Golfing Features
Preloaded with 42,000 courses worldwide
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)AutomaticAutomaticAutomaticAutomaticAutomaticAutomatic
Digital scorecard
Stat tracking (strokes, putts per round, greens and fairways hits)
Garmin Autoshot
Full Vector map
Auto CourseView updates
Green View with manual pin position
Hazards and course targets
Pinpointer
PlaysLike Distance
Touch-targeting
TrueSwing compatible
Round timer/odometer
Tournament Legal
Outdoor Recreation Features
Available outdoor recreation profilesHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticalHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticalHiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, TacticalHiking, Indoor Climbing, Bouldering, Climbing, Mountain Biking, Skiing, Snowboarding, XC Classic Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Snowshoeing, Jumpmaster, TacticalSkiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, RowingHiking, Indoor Climbing, Bouldering, Skiing, Snowboarding, XC Classic 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
Preloaded road and trail maps
Preloaded ski resort maps
Downloadable cartography support
Compatible with BaseCamp
GPS coordinates
Projected waypoint
Sight ‘N Go✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Area calculation ✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Hunt/fish calendar✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)✅ (via Connect IQ™)
Sun and moon Information Dual grid coordinates
XERO Locations
Cycling Features
Available cycling profilesBiking, Indoor Biking, TriathlonBiking, Indoor Biking, TriathlonBiking, Indoor Biking, TriathlonBiking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, TriathlonBiking, Indoor BikingBiking, 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)✅ (with compatible accessory)
Garmin cycle map (routable cycling-specific street map)
Compatible with Vector and Rally (power meters)
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 Features
Available swim profilesPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming, Open Water Swimming, Swimming/RunningPool Swimming, Open Water Swimming, Swimming/RunningPool SwimmingPool 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™)✅ (with HRM-Tri™, HRM-Swim™ and HRM-Pro™)
Underwater wrist-based heart rate
Time and distance alerts