GARMIN GPSMAP-640 Car Marine GPS. Garmin International is pleased to announce the new GPSMAP 620 and GPSMAP 640. These two new Garmin products offer elements of the GPSMAP 5000 series marine chartplotters combined with elements of the popular nuvi series for use on the road all in one easy to use device. Portable and powerful, the GPSMAP 620 and GPSMAP 640 feature a high sensitivity GPS receiver and boast a large, super bright 5.2 in WVGA touchscreen display that reacts as users tap and drag through the intuitive user interface. Out of the box, the GPSMAP 640 comes complete with marine and automotive mounts. This true land and sea navigator features preloaded maps such as highly detailed BlueChart g2 marine cartography of the coastal United States /including Alaska, Hawaii and the Bahamas/ as well as highly detailed City Navigator NT road maps for North America.