Garmin GPSMAP 78 & 86 series handheld GPS units are reliable and portable GPS devices that are suitable for hiking, hunting, ATV-ing or any outdoor adventure.

Some of the key differences between the units in the GPSMAP 78 & 86 series include:

  • Internal batteries: the GPSMAP 86 series has an internal rechargeable battery whereas the GPSMAP 78 requires two AA batteries.
  • Pre-loaded maps: The “sc” units (GPSMAP 86sc & 86sci) have preloaded BlueChart g3 U.S. coastal charts, the other units have no preloaded maps. All units have the ability to add maps.
  • Internal memory: The GPSMAP 78 series has a much smaller internal memory (1.7GB) than the GPSMAP 86 series (16GB). This impacts how many routes, waypoints and tracklogs you can store.
  • Photo navigation: The GPSMAP 78 series allows you to navigate to places where you’ve taken photos, the GPSMAP 86 series does not.
ProductGPSMAP 86s
gpsmap 86s
GPSMAP 86sc
gpsmap 86sc
GPSMAP 86i
gpsmap 86i
GPSMAP 86sci
gpsmap 86sci
GPSMAP 78
Garmin GPSMAP 78
GPSMAP 78s
Garmin GPSMAP 78s
GPSMAP 86sc
Garmin GPSMAP 78sc
Unit Dimensions2.65″ x 7″ x 1.7″ (6.75 x 17.8 x 4.4 cm)2.65″ x 7″ x 1.7″ (6.75 x 17.8 x 4.4 cm)2.75″ x 7″ x 1.7″ (7 x 17.8 x 4.4 cm)2.75″ x 7″ x 1.7″ (7 x 17.8 x 4.4 cm)2.6″ x 6.0″ x 1.2″
(6.6 x 15.2 x 3.0 cm)
2.6″ x 6.0″ x 1.2″
(6.6 x 15.2 x 3.0 cm)
2.6″ x 6.0″ x 1.2″
(6.6 x 15.2 x 3.0 cm)
Display Size1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm) 1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)
1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)
Display Resolution240 x 400 pixels240 x 400 pixels240 x 400 pixels240 x 400 pixels160 x 240 pixels160 x 240 pixels160 x 240 pixels
Display TypeTransflective, 65K color TFTTransflective, 65K color TFTransflective, 65K color TFTransflective, 65K color TFTransflective, 65K color TFTransflective, 65K color TFTransflective, 65K color TFT
Weight9.59 oz (272 g)9.59 oz (272 g)9.59 oz (272 g)9.59 oz (272 g)7.7 oz (218.3 g) with batteries7.7 oz (218.3 g) with batteries7.7 oz (218.3 g) with batteries
Batteryrechargeable internal lithium ionrechargeable internal lithium ionrechargeable internal lithium ionrechargeable internal lithium ion2 AA batteries (not included); NiMH or Lithium recommended2 AA batteries (not included); NiMH or Lithium recommended2 AA batteries (not included); NiMH or Lithium recommended
Battery LifeUp to 40 hours (standard mode); up to 200 hours (expedition mode)Up to 40 hours (standard mode); up to 200 hours (expedition mode)Up to 40 hours (standard mode); up to 200 hours (expedition mode)Up to 40 hours (standard mode); up to 200 hours (expedition mode)20 hours20 hours20 hours
Waterproof✅ (IPX7)✅ (IPX7)✅ (IPX7)✅ (IPX7)✅ (IPX7)✅ (IPX7)✅ (IPX7)
Floats
High-Sensitivity Receiver
InterfaceUSB and NMEA 0183 compatibleUSB and NMEA 0183 compatibleUSB and NMEA 0183 compatibleUSB and NMEA 0183 compatibleUSB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatible
Basemap
Preloaded Maps✅ (preloaded BlueChart g3 U.S. coastal charts)✅ (preloaded BlueChart g3 U.S. coastal charts)✅ (preloaded U.S. coastal charts)
Ability to Add Maps✅16GB
Built-in Memory16GB16GB16GB16GB1.7 GB1.7 GB1.7 GB
Accepts Data CardsmicroSD™ card (not included)microSD™ card (not included)microSD™ card (not included)microSD™ card (not included)microSD™ card (not included)microSD™ card (not included)microSD™ card (not included)
Waypoints10,00010,00010,00010,000200020002000
Routes250250250250200200200
Tracklog20,000 points, 250 saved gpx tracks, 300 saved fit activities20,000 points, 250 saved gpx tracks, 300 saved fit activities20,000 points, 250 saved gpx tracks, 300 saved fit activities20,000 points, 250 saved gpx tracks, 300 saved fit activities10,000 points, 200 saved tracks10,000 points, 200 saved tracks10,000 points, 200 saved tracks
Automatic Routing✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)✅ (with optional mapping for detailed roads)
Electronic Compass✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)
Barometric Altimeter
Photo navigation
Picture Viewer
Custom Maps Compatible
Geocahing- Friendly✅ (Paperless)✅ (Paperless)✅ (Paperless)✅ (Paperless)✅ (Paperless)✅ (Paperless)✅ (Paperless)
Hunt/Fish Calendar
Sun and Moon Information
Tide Tables
Area Calculations
Custom POIs
Unit-to-unit Transfer
Garmin Connect Compatible
Smart Notification
Interactive SOS
Send and Receive Text Messages to SMS and Email
Send and Receive Text Messages to other inReach Device
Exchange Locations with Other inReach Devices
Mapshare Compatible with Tracking
Virtual Keyboard for Custom Messaging
inReach Remote Compatible
Boat Data Streaming
Functions as a Remote Control for Garmin Autopilot and Select FUSION Marine Products
Adjustable GPS Filter