>>683948You can't hold a compass near any metallic objects (including other compasses) or you will get a bogus reading. If you have a watch on your domininant hand, take it off. Don't take readings under power lines, and keep in mind that some geologic features (such as underground minerals) can throw off compass work. That's why you should contact your local natural resources department before setting off on a trek. They can provide you with this information.
