I'm a newbie, but adjusting the elevation on my two finds today seems to have made a difference. When I manually entered the coords on my eTrex, for whatever reason the "default" elevation was 79 ft. below sea level. When I got close to each cache, I noted my actual elevation (+59 and +53 feet), edited the waypoint, and hit GoTo again. In both cases, I got much closer than I had with my previous two finds where I didn't use the elevation -- in fact, I didn't need the hints. It seems to me that if I hadn't changed the elevation on the waypoint, I would have been ~120 feet off. Of course, this is assuming the coords for the cache are accurate.
Am I not understanding the third dimension of this? It seems to me if I was standing on the edge of a cliff 200 ft above sea level, directly over a cache hidden in the face of the cliff 100 ft below me, the GPSr would say I'm 100 ft away. I guess the arrow would spin as I moved because it wouldn't be N, S, E or W of me, but...
I understand what Kerry and Team Dragon say about the accuracy of elevation on entry-level GPSrs, but it seems to have made a difference today. Or maybe it's just that the cachers' coordinates were more accurate.
No matter how cynical you become, it's never enough to keep up. - Lily Tomlin