"Clear display, is easy to read and easy to use."5.0 starson by GarminChartplotter
Pros: If you interested in fishing, the sounder version of Garmin chartplotter GPSMAP 421s comes with a powerful dual frequency transducer that clearly paints depth contours, fish targets and structure whether you're fishing in freshwater or off the coast.
Cons: Not made for land lovers.
Summary: With fewer keys and a simple, intuitive interface, the GPS chartplotter 421s makes navigating your way through the water easy.