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Garmin GPSMAP 420
This sleek chartplotter offers big capability in a small package. The GPSMAP 420 features an ultra-bright 4” QVGA display and a built-in, satellite-enhanced worldwide basemap. Add even more mapping capabilities with the optional BlueChart® g2 Vision card.
See detail-rich imagery like never before
The worldwide basemap on the 420 can be enhanced with the optional BlueChart® g2 Vision card, which provides high-resolution aerial reference photos for help navigating tricky harbors and channels — or locating spots like area marinas, fuel stops or restaurants.
The g2 Vision plug-in data card also allows the GPSMAP 420 to graphically depict a true 3D “mariner’s eye” topside view or “fish eye” underwater navigation perspective.
Experience super simple user interface for easy operation
With fewer buttons to push and fewer operational steps to navigate, the simplified menu format on the 420 makes it easy for you to see and select the data you want to access on-screen.
Simplify navigation with Auto Guidance
Optional g2 Vision auto guidance technology will help simplify your navigation. It’s like having a knowledgeable guide to local hazards and waterways always on deck. Auto Guidance searches all the chart features to suggest the best known charted route for navigation.
Enjoy added functionality of sonar The 420s comes with powerful dual frequency or dual beam sonar to clearly paint depth contours, fish targets, structure, etc. It’s also CANet™ capable, allowing sounder data to be shared with other plotter displays on your boat | 
