Re: GPS and/or topo maps for ranging
Dave, that's great accuracy! You'll really like the transparent UTM grids. I've been wanting to get out and test accuracy since the SA is off, but just haven't had time yet.
Any day the new I-Finders will be out. Never thought I'd have any use for a background map, but with the new software that's coming out, they're like having a topo inside your unit.
I think there is also a 'position correction factor' on your unit that will align your GPS to your map. This is a must when using a topo.
I took a surveying class in college and the major factor in better accuracy was the amount of readings their unit took for average. There was no difference in the magnitude of change in position between it and my old 8-channel handheld.