Use a compass?

[Gerritt]

http://news.nationalgeographic.com/news/20...earth-core.html

 

G.

[Fisherman]

Ya, it's always on the move although adding or subtracting the annual declination to adjust for topo maps isn't all that much unless you plan on trekking for tens of kms and have to get to a very specific point. As long as you are using it as a safety item to get off the lake in a snowstorm or "out of the woods" to a general area, we're still pretty safe.

Edited December 27, 2009 by Fisherman