The GPSMAP® 162 offers boat owners an affordable option in fixed-mount navigationThe GPSMAP 162 is a combination GPS receiver and chartplotter that's rich in features including a powerful 12 parallel channel GPS receiver and tide prediction tables. Even more remarkable, the GPSMAP 162 can download up to 2.5 MB of extra map data from GARMIN's apSource line of CD-ROMs, including Fishing Hot Spots®.Physically, the unit resembles GARMIN's popular Fishfinder 240. The GPSMAP 162 measures about five by six inches in size and boasts a four-level gray FSTN LCD display with 240 x 240 pixels. Even in the dark the units are easy to read, thanks to a backlit display.