wmclark43

You guys are right, I'm not using this for geocaching. You guys seem to know GPS units, so I figured I'd ask here. Trimble doesn't have a good online forum (like ESRI products do, for example) for trouble shooting. I'm guessing you are using state plane coordinates to survey property corners or something similar, and that you've borrowed the Trimble from a surveyor. IIRC (fuzzy memory) some Trimbles require a ground station within maybe 50 miles of the survey site to achieve their centimeter accuracy. I'm not a surveyor, but I doubt you will find anyone on this site except a surveyor who geocaches for a hobby who can answer your question. Hi- I am new to this geocaching, however I too use a Trimble Geoexplorer 6000. Also set up in the NAD83 cons format. I reset the unit to WGS 84 and all seems to work. My base map won't work because it is in the NAD coordinate system. My experience has been in developing a GIS map for our local water system showing meters, valves and such. All the answers from the previous posts seem corect. I had this large error in distance but was not entering (manually) the waypoint coordinates properly, had the west and east reversed. Any good ideas for info on conversions between different Nad - WGS systems? Bill