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GARMIN GPSMAP 78, 79 & 86 Series GPS Comparison
Here's how the models are different

Click here to compare with other Garmin handhelds

Discontinued
Discontinued
gpsmap 86s
gpsmap 86sc
gpsmap 86i
gpsmap 86sci
gpsmap 79s
gpsmap 79sc
Garmin GPSMAP 78
Garmin GPSMAP 78s
Garmin GPSMAP 78sc
Unit dimensions:
2.65" 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)
2.67'' x 6.85'' x 1.67'' (6.77 x 17.40 x 4.23 cm)
2.67'' x 6.85'' x 1.67'' (6.77 x 17.40 x 4.23 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 size:
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)
1.5"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 resolution:
240 x 400 pixels
240 x 400 pixels
240 x 400 pixels
240 x 400 pixels
240 x 400 pixels
240 x 400 pixels
160 x 240 pixels
160 x 240 pixels
160 x 240 pixels
Display type:
transflective, 65K color TFT
transflective, 65K color TFT
transflective, 65K color TFT
transflective, 65K color TFT
transflective, 65K color TFT
transflective, 65K color TFT
transflective, 65-K color TFT
transflective, 65-K color TFT
transflective, 65-K color TFT
Weight:
9.59 oz (272 g)
9.59 oz (272 g)
9.59 oz (272 g)
9.59 oz (272 g)
9.95 oz (282g) with batteries
9.95 oz (282g) with batteries
7.7 oz (218.3 g) with batteries
7.7 oz (218.3 g) with batteries
7.7 oz (218.3 g) with batteries

Battery:

rechargeable internal lithium ion
rechargeable internal lithium ion
rechargeable internal lithium ion
rechargeable internal lithium ion
2 AA batteries (not included); NiMH or Lithium recommended
2 AA batteries (not included); NiMH or Lithium recommended
2 AA batteries (not included); NiMH or Lithium recommended
2 AA batteries (not included); NiMH or Lithium recommended
2 AA batteries (not included); NiMH or Lithium recommended
Battery life:
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 35 hours in 10-minute tracking mode; up to 200 hours (expedition mode)
Up to 35 hours in 10-minute tracking mode; up to 200 hours (expedition mode)
up to 19 hours
up to 19 hours
20 hours
20 hours
20 hours
Waterproof:
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
yes (IPX7)
Floats:
High-sensitivity receiver:
GPS/GLONASS/Galileo/QZSS
GPS
GPS
GPS
GPS
GPS, GLONASS, Galileo, Beidou, QZSS and SBAS
GPS, GLONASS, Galileo, Beidou, QZSS and SBAS
GPS
GPS
GPS
Interface:
USB and NMEA 0183 compatible
USB and NMEA 0183 compatible
USB and NMEA 0183 compatible
USB and NMEA 0183 compatible
high speed microUSB and NMEA 0183 compatible
high speed microUSB and NMEA 0183 compatible
USB and NMEA 0183 compatible
high-speed USB and NMEA 0183 compatible
high-speed USB and NMEA 0183 compatible
MIL-STD-810
x
x
x
x
yes (thermal, shock, water); bare unit only
yes (thermal, shock, water); bare unit only
x
x
x
 
Basemap:
Preloaded maps:
x
yes (preloaded BlueChart g3 U.S. coastal charts)
x
yes (preloaded BlueChart g3 U.S. coastal charts)
x
yes (preloaded BlueChart g3 U.S. coastal charts)
x
x
yes (preloaded U.S. coastal charts)
Ability to add maps:
Map Segments
N/A
N/A
N/A
N/A
15,000
15,000
N/A
N/A
N/A
Built-in memory:
16GB
16GB
16GB
16GB
8GB
8 GB (user space varies based on included mapping on sc version)
1.7 GB
1.7 GB
1.7 GB
Includes detailed hydrographic features (coastlines, lake/river shorelines, wetlands and perennial and seasonal streams)
x
x
x
x
Yes (downloadable from Garmin Express™)
Yes (downloadable from Garmin Express™)
x
x
x
Includes searchable points of interests (parks, campgrounds, scenic lookouts and picnic sites)
x
x
x
x
Yes (downloadable from Garmin Express™)
Yes (downloadable from Garmin Express™)
x
x
x
Displays national, state and local parks, forests, and wilderness areas
x
x
x
x
Yes (downloadable from Garmin Express™)
Yes (downloadable from Garmin Express™)
x
x
x
Accepts data cards:
microSD™ card (not included)
microSD™ card (not included)
microSD™ card (not included)
microSD™ card (not included)
yes (32 GB max microSD™ card, not included)
yes (32 GB max microSD™ card, not included)
microSD™ card (not included)
microSD™ card (not included)
microSD™ card (not included)
Waypoints:
10,000
10,000
10,000
10,000
10,000
10,000
2000
2000
2000
Routes:
250
250
250
250
250, 250 points per route; 50 points auto routing
250, 250 points per route; 50 points auto routing
200
200
200
Track log:
20,000 points, 250 saved gpx tracks, 300 saved fit activities
20,000 points, 250 saved gpx tracks, 300 saved fit activities
20,000 points, 250 saved gpx tracks, 300 saved fit activities
20,000 points, 250 saved gpx tracks, 300 saved fit activities
20,000 points, 250 saved gpx tracks, 300 saved fit activities
20,000 points, 250 saved gpx tracks, 300 saved fit activities
10,000 points, 200 saved tracks
10,000 points, 200 saved tracks
10,000 points, 200 saved tracks
RINEX Logging
x
x
x
x
x
x
x
 
Automatic routing:
yes (with optional mapping for detailed roads)
yes (with optional mapping for detailed roads)
yes (with optional mapping for detailed roads)
yes (with optional mapping for detailed roads)
Yes (with optional mapping for detailed roads)
Yes (with optional mapping for detailed roads)
yes (with optional mapping for detailed roads)

yes (with optional mapping for detailed roads)

yes (with optional mapping for detailed roads)
Point-to-point navigation        
x
x
x
Compass:
yes (tilt-compensated, 3-axis)
yes (tilt-compensated, 3-axis)
yes (tilt-compensated, 3-axis)
yes (tilt-compensated, 3-axis)
Yes (tilt-compensated 3-axis)
Yes (tilt-compensated 3-axis)
x
yes (tilt-compensated, 3-axis)
yes (tilt-compensated, 3-axis)
GPS Compass (while moving)
x
x
x
x
x
x
x
Barometric altimeter:
x
x
x
Photo navigation:
x
x
x
x
x
x
Picture viewer:
Custom maps compatible:
Geocaching-friendly:
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
yes (paperless)
Hunt/fish calendar:
Sun and moon information:
x
x
Tide tables:
x
x
x
x
x
x
Area calculation:
Custom POIs:
x
x
Unit-to-unit transfer:
x
x
x
Garmin Connect™ compatible:
x
x
Smart notifications:
x
x
x
x
x
 
Interactive SOS
x
x
x
x
x
x
x
Send and receive text messages to SMS and email
x
x
x
x
x
x
x
Send and receive text messages to other inReach device
x
x
x
x
x
x
x
Exchange locations with other inReach device
x
x
x
x
x
x
x
MapShare compatible with tracking
x
x
x
x
x
x
x
Virtual keyboard for custom messaging
x
x
x
x
x
x
x
inReach remote compatible
x
x
x
x
x
x
x
Boat data streaming
x
x
x
x
x
Functions as a remote control for Garmin autopilot and select FUSION® marine products
x
x
x
x
x
Adjustable GPS filter 
x
x
x
x
x
 
(1) Electronic compass: Provides direction information while you are standing still.
(2) Barometric altimeter: Gives altitude accurate to 10 feet with proper calibration.
(3) Elevation profiling: Records your "trip profile" in elevation
(4) Area calculation: Calculates the area enclosed by the track log


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