The GPSMAP 420 is a sleek, space-saving chartplotter that
features an ultra-bright 4” QVGA display; built-in,
satellite-enhanced worldwide basemap and simplified user
operation. The 420 also has an SD card slot so you can add
additional features with the optional BlueChart® g2 Vision card.
View Satellite-enhanced Maps
The 420’s basemap contains worldwide satellite images in
place of more traditional maps, and its SD card slot makes it
easy to add additional maps without connecting to a computer.
With fewer keys and a simple, intuitive interface, the 420 makes
navigating your way through the water easy.
Add Sonar
The sounder version, GPSMAP 420s, comes with a powerful dual
frequency or dual beam transducer that clearly paints depth
contours, fish targets and structure whether you’re fishing in
freshwater or off the coast. The 420 and 420s are also CANet™
compatible, so you can share sounder data with another
chartplotter on your boat.
Add Extras with BlueChart g2 Vision
With the optional BlueChart g2 Vision SD card, you can add a
whole new dimension of exceptional features to your chartplotter.
- 3D mariner’s eye view or fish eye view provides you with
a 3-dimensional perspective of map information, both above
the waterline and below it.
- High-resolution satellite images and aerial photographs
help you orient yourself in unfamiliar areas.
- Auto Guidance technology searches through all relevant
charts to create a route you can actually follow — one that
avoids obstacles, shallow water, buoys and other
obstructions.