Garmin GPSMAP 76CSx Handheld GPS Receiver

The unit is very accurate, often to within 10 feet. The antenna which gives you extra gain is not needed (separate purchase) as the unit is very accurate without it. The plug in for 12 volt power supply is very handy to spare the AA batteries, but must be purchased separately. For being most useful, you must purchase maps, such as Bluechart (for marine use), topo (for hiking), and city navigator (to have all the streets in the USA). Ebay is the best place to buy those. The map which comes with the unit is fairly accurate, but low on details. It gives major intersections, general outlines of lakes, etc. I love the built in electronic compass and altimeter. I love that it is watertight and floats. The sun-moon feature is great. The screen is a little hard to read in the shade, but great in the sunlight. This partly depends on what color background you choose. The backlight works great, but lowers battery life if you don't have it hooked to external power. The unit, along with the bluechart software may have saved my life. Coming into Bodega Bay from the ocean in my boat, in dense fog, I was able to skirt around some dangerous rocks and steer directly into the harbor. I couldn't see 50 feet! I bought it after comparing features with many others. I haven't been disappointed. I wish all the maps were included, but they really are the products of hundreds of maps seamlessly put together, so in reality they are a good buy also. The micro sd card is nice, but unless you are going on very very long trips, the 76cs or 60cs will hold lots of data. If I had to do it over, I would probably get one of those, as the built-in memory holds enough data for several states. All in all, I have had fun with this unit and expect to do so for a long time. Mack