GPS frequently shows an EPE of less > > that 15m and he would ignore errors at that low level though larger > > errors he would take notice of. > > Just to clarify. A low EPE means that the GPS thinks everything is > fine even though those estimates are less than what is possible with > the technology. I think (have to turn it on, and wait for a while) that my Garmin can show 15 ft accuracy, which is 4.5m. There are additional (or different) satellites to achieve such increased accuracy, called WAAS. But not in all areas. I've seen such accuracy displayed quite often, and didn't notice it to be incorrect, though such accuracy exceeded that of the built-in map :-). And, yes - GPS can be used as a subsitute for compass (but it should be a supplement, - there is no excuse not to carry at least $5 around-the-neck compass). Even GPS without a compass can display a bearing to some map point or waypoint. *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Thu Sep 02 2004 - 11:24:06 PDT
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