Marbee40 0 Posted December 4, 2006 All, This was written by a good buddy of mine, Chuck Albrecht. As you can see, Chuck works for the Border Patrol, but this info is good for ANYONE working with maps, GPS, etc. Chuck used to work here in SD and one of his jobs was teaching a two-day land nav course of which I graduated from...twice! (Perishable skill, doncha know!) Enjoy, Coordinate_Systems_and_Understanding_Them.doc Share this post Link to post Share on other sites