Part Number: 010-01182-00
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8" Keyed Chartplotter for Cruising, Sailing or Fishing

  • 8” colour SVGA display with keyed control
  • with BlueChart® g2 Vision and BlueChart® g2 mapping
  • High-sensitivity internal 10 Hz GPS/GLONASS receiver
  • Compatible with LakeVü™ HD Ultra, BlueChart® g2 and BlueChart g2 Vision®
  • Supports all Garmin marine radar

The 8” colour GPSMAP 820 keyed chartplotter has a preloaded worldwide basemap. The built-in 10 Hz GPS/GLONASS receiver updates your position and heading 10 times per second.

With NMEA 2000® support for autopilot capability, engine data, SiriusXM® Weather and more, the GPSMAP 820 is compatible with LakeVü HD Ultra, BlueChart g2 and BlueChart g2 Vision. It also supports all Garmin marine radar.

For even more functionality, wirelessly connect to Apple® (mobile digital device) for BlueChart® Mobile. The chartplotter includes 2 SD™ data card slots, allowing for gigabytes of storage. It can be flat, flush or bail mounted.


The GPSMAP 820xs offers select networking capabilities that allow you to share features with other compatible GPSMAP units, such as radar, GCV 10 DownVü and SideVü scanning sonar, supplemental maps, and user data, such as waypoints, routes and tracks.

Special Sailing Features

Supported sailing features include laylines, enhanced wind rose, heading and course-over-ground lines, and true wind data fields.

Enhanced Auto Guidance

Just enter the location where you want to go and patented Garmin Auto Guidance technology instantly searches through relevant charts to create a safe virtual pathway on the display that helps you avoid low bridges, shallow water and other charted obstructions en route.

Better still, with enhanced Version 2.0, you now have access to even more features and capabilities. You’re able to adjust the calculated Auto Guidance pathway by inserting “via” points at interim stops or landmarks along your desired route. You can easily review hazard points along your calculated path. And you can even engage your compatible Garmin autopilot to follow the Auto Guidance route, automatically. Other 2.0 enhancements give you the ability to calculate arrival times at any point on your route (great for timing arrivals to correspond with bridge openings and other time-critical events). Better still, you can now save your plotted Auto Guidance paths for future navigation by backing them up on an SD™ card with your BlueChart® g2 Vision® or Lake Vü™ HD Ultra cartography¹.

GPX Waypoints Transfer

If you have waypoints, tracks or frequently used routes stored on another manufacturer’s GPS product – or on a Garmin handheld device –  now it’s easier than ever to transfer those items to your new Garmin chartplotter, via industry-standard GPX software formatting. GPX is an open standard format for GPS data exchange across platforms and applications. With this easy-to-use interface technology, Garmin has taken “no waypoint left behind” to a whole new level of trade-up convenience.

Panoptix™ Down Transducer

With 1 Panoptix Down transducer, you get 3 remarkable views, allowing you to actually see fish and bait swimming around under your boat – in real time. You can even see fish in the water column in 3-D, from the bottom to the surface. You can be stationary yet still see things in 3-D below your boat.


Shows real-time moving sonar images below the boat. This screen shows bait drop echo trail movement in purple with sonar history data at left.


Scans the area below the boat from front to back and side to side. This screen shows a school of fish sitting against the back side of vertical face, on Pport side of boat 35 feet deep.


Scrolls through the data as the boat moves to show the history of entire water columns – from the bottom to the surface and all of the fish in between. This screen shows the boat passing over a stream channel with a school of fish between 30 to 40 feet.

Panoptix Forward Transducer

One Panoptix Forward transducer provides 2 impressive views, even while your boat is stationary. It shows the bottom plus fish and bait swimming in the water column in front of your boat – in real time. You can even see your lure as you reel it in. You can also get 3-D views of fish and structure in front of your boat.


Updates are provided with a single ping, providing real-time moving images of what’s in the water. This screen shows a large target (a diver) approaching the boat.


Digitally scans the area in front of the boat, creating a forward-looking 3-D view of the bottom, structure and fish. This screen shows fish targets at 10 feet and drawing bottom depth of 20 feet.

New Charts Guarantee LakeVü HD Ultra


Physical & Performance

Physical dimensions 29.3 x 18.8 x 7.4 cm
Display size, WxH 16.2 x 12.1 cm, 20.3 cm diagonal
Display resolution, WxH 800 x 600 pixels
Display type SVGA display
Weight 1.6 kg
Water rating IPX7
Antenna Internal with external connection
NMEA 2000® compatible
NMEA 0183 compatible
SiriusXM™ Weather & Radio compatible
Power consumption

Max power usage at 10 Vdc: 14 W

Typical current draw at 12 Vdc: 1.1 A

Max current draw at 12 Vdc: 3.2 A

Mounting options Bail, flat or flush
Garmin Marine Network™ ports 1

Maps & Memory

Preloaded maps None
Accepts data cards 2 SD™ cards
Waypoints 5,000
Routes 100
Track log 50,000 points; 50 saved tracks

Chartplotter Features

Garmin Radar compatible
Garmin Sonar compatible Yes (with GCV™ black box, sold separately)
Supports AIS (tracks target ships position)
Supports DSC (displays position data from DSC-capable VHF radio)
Tide tables
Garmin Meteor Audio System compatible
Supports Fusion-Link compatible marine radios
GCV™ Black Box sonar support
BlueChart® Mobile (planning) compatible
Garmin Helm compatible

Sonar Features & Specifications

DownVü™ Yes (with GCV™ black box, sold separately)
SideVü™ Yes (with GCV™ black box, sold separately)


NMEA 0183 input ports 2
NMEA 0183 output ports 2
Video input ports None
Video output ports None
Wireless connectivity



Wifi can only be used with the below compatible Garmin apps.

  • Garmin BlueChart Mobile
  • Garmin Helm

In the Box

  • GPSMAP 820 with worldwide basemap
  • Power/data cable
  • Bail mount
  • Flush mount
  • Protective cover
  • Documentation


Maps for New Regions

Need maps for other regions? See all maps that are compatible with this device.

Need a map update?

Update the maps that came with your device for the best navigation experience.

Check for Updates


Lake Search

Search for LakeVü lakes by name or location.