GARMIN GPSMAP 620 ALL IN ONE MARINE & AUTOMOTIVE GPS (34173) Navigate by land and by sea with the Garmin GPSMAP 620. This full-featured marine chartplotter pulls double duty with an automotive mode that’s ready to go as soon as you reach the shore when loaded with optional City Navigator NT road maps for North America. And to make sure you always know the way, the GPSMAP 620 comes standard with a high-sensitivity GPS receiver […]