"Steve Lusardi" wrote in
:

It's wonderful, but how do you use it?
Steve

"Larry" wrote in message
...
http://www.geomag.us/models/WDMAM/WDMAM_NGDC_V1.1.pdf

No WONDER the damned compass won't compensate!



--
"iPad is to computing what Etch-A-Sketch is to art!"

Larry



I'm not sure. It's calibrated in nanoteslas + and - so there seems to
be pushing and pulling the card at various magnetic levels that keep
shifting, it seems. Zooming in on the Charleston-Savannah area, there
are several strong magnetic anomalies of BOTH directions.



This chart may also cause the compass to spin in both directions at
times....a very worrying condition:
http://www.kitco.com/images/live/gold.gif


--
"iPad is to computing what Etch-A-Sketch is to art!"

Larry