Funny how you seem to continue to argue with petty comments on a thread where you made the OP with completely incorrect statements that I came on and corrected, including advising you that WY G&F GWs are now using them! However, the instruments we are talking about should not be used by anyone to get down to the nitty gritty of determining exactly where a property line or corner is located. That includes the GWs who are not using them for that purpose, but are actually just using them to get an approximation as to whether a person is well onto private property illegally and not just a few feet over a boundary line! As I stated before, using a hand held GPS like it's a survey grade instrument is only going to get a person into trouble sooner or later. Even if your GPS is accurate to within 3' all day every day, and it would have to be an awfully good one to be that accurate, look at any company related material that makes them and you will read disclaimers that the companies post regarding accuracy. The inaccuracy distance of the hand held units needs to be considered whether you are out hunting or cutting trees for a living is all I'm saying! The GPS units along with the landowner chips or downloads for them are probably the best thing to have come on the market over the last 20 years that I can think of for hunters along with the Thermacell units for skeeter control, LOL!