>.  Most of the lower resolution
> coordinates claim only +/-6 arcsecond resolution, but I've rarely seen one
> off by more than about 1 arcsecond on either longitude or latitude, so the
> GPSR should get you within eyeball distance of the marker - perhaps 100
feet
> or so (but of course, some are hard to see under the scrub bushes and so
on).

The one that was near my work showed a difference of 5 feet between my GPSR
and the published coords.

Darren
Team Imperial Eagle