The problem with large variation numbers is that they aren't consistent, very local and then it's back to normal but you don't know it's back to normal and you're still trying to figure out how far off the compass is from where it should be.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.