GPS Handhelds. Erin Miller Suzette Stone. Introduction. At one time all GPS units attempted to cater to everyone. Currently more specialized units are available. You need to understand exactly what you intend to do with a GPS unit before you buy one.
A navigation receiver is not a survey device but it more accurate than most of the digitized maps you use it with. Remember many of these maps were digitized using paper maps.
The Meridian GPS by Thales Navigation seems to be the best choice.