Garmin GPSMAP 8424



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The GPSMAP 8400 series displays are the premium multifunction displays from Garmin. The range of sizes mean there’s a solution for every helm. These units are fully networkable with other GPSMAP displays and the full HD LCD display means they look incredible too.

One of the most noticable features of these displays is the lightning fast response time when it comes to navigating between menus and functions. Garmin has loaded the 8400 series with a capable processor, and it definitely shows!


Take Control of a Beautiful Helm

GPSMAP 8424 large-format multifunction display features a 24-inch full HD screen with touch control. Sunlight-readable, anti-glare display is exceptionally easy to view and also includes auto-dimming feature for use in low light or at night. New maximum glass design enables you to experience a beautifully powerful, completely networked helm at your fingertips. In-plane switching (IPS) LCD display — an industry first for this class — provides consistent, accurate colors from all viewing angles. It also provides standard USB touch output for use as a touchscreen monitor for Windows® and Mac operating systems. Install multiple displays with the industry’s lowest flush-mount profile or flat mount them edge-to-edge to create a sleek glass helm look. Quick, 1-touch access to the information you need makes boating easier

Full System Integration
GPSMAP 8424 integrates various sonar technologies as well as autopilot, connectivity, apps, engine data and multi-media. User data can be automatically synced for all networked 8400/8600 series chartplotters across multiple helms — everything you need is at your fingertips, all on 1 screen. A full digital switching system uses CZone technology. You can power up your boat while away from the dock, switch on pumps and control lights — even underwater lights. Nearly all of your controls are available right at your fingertips either at the helm or programmed into a remote key fob or an app on your tablet provided by CZone by Mastervolt.

New High-performance Processor
Experience the fluidity of our fastest map drawing ever and enhanced video processing. Add up to 4 IP camera streams and simultaneous Garmin Helm support. In addition, all your added sensors, such as radar, sonar, multimedia and more, will benefit from the increased performance to provide a premium experience across your boat’s entire network.

To make boating easier, GPSMAP 8424 includes presets for sonar, radar, cameras, media and digital switching, which can be independent or incorporated into SmartMode. With SmartMode control, you can quickly change all screens at a helm in sync to a preset mode, for example, fishing, docking, night cruising, etc. One-touch access allows you to switch all monitors in sync from 1 mode to another without manually switching each monitor separately. Fully customizable layouts, data and gauges allow you to place the information you need to see right where you want it.

Network Sharing
GPSMAP 8424 allows you to share features with other compatible GPSMAP units such as radar, supplemental maps and user data, including waypoints, routes and tracks. You can also share images from Garmin VIRB action cameras, GC 10 marine cameras and FLIR cameras. User data entered into 1 chartplotter can be automatically synced with other chartplotters in a network.

Heading, Position Refreshed 10 Times per Second
Fast, responsive built-in 10 Hz GPS refreshes your position and heading 10 times each second to make your movement on the screen more fluid. Now, it’s quick and easy to drop up to 5,000 accurate waypoints and find your way back to them.

Create Your Own HD Maps
Quickdraw Contours is a free, easy-to-use software feature that is already installed on your GPSMAP 8424. It instantly creates your very own personalized HD fishing maps with 1-foot contours. Tailor them to fit your needs. They are your maps. You own them. Keep the data to yourself or share it with Garmin or your friends. There’s no special surveying expertise required. You just fish while it creates maps. You don’t have to wait around or send your files away like other mapping software requires — your results appear instantly. Use with any Garmin Panoptix, any HD-ID™, any CHIRP-enabled, Garmin ClearVü transducer or NMEA 2000-compatible depth transducer. Have more than 1 sonar device installed onboard? Quickdraw Contours automatically selects the most capable sonar device to provide the very best results for you!

Built-in Connectivity
It’s easy to connect to peripheral devices with built-in Wi-Fi connectivity, ANT technology, 4 wired Ethernet ports, NMEA 2000, HDMI and USB ports with complete network compatibility. It’s easier than ever to enjoy the full range of features provided by Garmin Helm and BlueChart Mobile apps.

  • Premium 24-inch full HD display with pinch-to-zoom touchscreen control has highest resolution on the marine market
  • Configure the full system to provide 1-touch setting access for docking, cruising, fishing, anchoring and more
  • Beautiful glass helm look with ability to install multiple displays either flush or flat mounted edge-to-edge
  • High-performance processor delivers our fastest map drawing ever and enhanced video processing
  • Provides a superior user experience across your entire network for radar, sonar and multimedia

Physical dimensions    22.8″ x 16.1″ x 2.8″ (60.0 cm x 41.0 cm x 7.1 cm)
Weight    18.95 lbs (8.60 kg)
Water rating

Display type    Touchscreen IPS display (anti-glare finish)
Display size    20.4″ x 12.8″ (51.8 x 32.5 cm)
Display resolution    1920 x 1200 pixels
Power consumption
Max power usage at 10 Vdc: 87 W

Typical current draw at 12 Vdc: 6.1 A

Max current draw at 12 Vdc: 7.6 A

Antenna    External only
Mounting options    Flush or Flat
10 Hz high-sensitivity

Garmin Marine Network™ ports

Maps & Memory
Accepts data cards
2 SD Cards (with Garmin SD card reader accesory)


Routes    100 (250 waypoints each)
Track log    50,000 points; 50 saved tracks, with 5000 points each
Preloaded maps

Outdoor Recreation Features
Tide tables
Chartplotter Features
Garmin Radar compatible
Garmin Sonar compatible

Garmin SmartMode compatible (customizable monitor presets)
Supports AIS (tracks target ships position)
Supports DSC (displays position data from DSC-capable VHF radio)
Garmin Meteor™ Audio System compatible
Supports FUSION-Link™ compatible radios
GSD Black Box sonar support
GCV Black Box sonar support
BlueChart Mobile (planning) compatible

Garmin Helm compatible

GRID (Garmin Remote Input Device) compatible
Sonar Features & Specifications
Dual-frequency (50/200 kHz) sonar capable    Yes (with compatible black box sonar)
Dual-beam (77/200 kHz) sonar capable    Yes (with compatible black box sonar)
CHIRP sonar technology    Yes (with external black box)
Yes (with GCV black box, sold separately)

Yes (with GCV black box, sold separately)

NMEA 2000® compatible
NMEA 0183 input ports

NMEA 0183 output ports

Video input ports
1 – BNC composite

1 – HDMI (HDCP compliant)

Video output ports
1 – HDMI

Wireless connectivity

Additional connections:

NMEA 2000 port: 1
USB port: 1
J1939 port: 1
HDMI and composite video inputs are encoded and shared across the Garmin Marine Network to other comaptible chartplotters.

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