@scotland A friend of mine was scratching around a fence corner looking for a property corner (monument) a few years ago, and tripped an M44. It was ...

Wellllll, at least it wasn't an M44 Coyote "trap."

Yup, but it was 50 years ago. They DO "work" (and DON'T need batteries), but I would rather have a modern passive gradiometer (Sub-Surface or Schonste...

I remember spending many nights in a USFS "Tent Shack" @ 9000 ft. MSL, balancing earth-work under the light of a Coleman Lantern by hand calculations ...

@flga-2-2 The 0000 was even worse. I have a compete set somewhere, probably out in the garage. Probably a Leroy Set too. It all belongs in a museum (...

I hear ya man! I started in 1968 and all I can say is; What a long strange trip it's been. Loyal

@mark-mayer Actually the first definition of the US Foot relative to the Meter was in the Metric Act of July 28, 1866 (AKA The Kasson Act) which stip...

1% ????ÿ That would be 1.01 or 0.99 (10,000ppm) or 1 foot in 100 feet! I can't imagine ANY combination of prism offset. environmental correction, Cu...

@mark-mayer Excellent outline Mark!!! That pretty much follows the same SOP as I have used for decades (even before OPUS). I suppose that you could e...