You will find a number of compasses at any sporting goods store. I like the type that is liquid damped and mounted on clear plastic so it can be laid on a map and you can still see the map through it. That way, you can take the bearing of a landmark that won't change during the pole shift, then after the pole shift record the new bearing. Then you will be able to re-orient your map post pole shift and still be able to use your compass and map as a guide.
Offered by Ron.