As Doug mentioned the cost of doing that is prohibitive. Much easier to get
two compasses. When you see the need, and it will be very apparent. Switch
to the other one. Then you only have to swing the compass for correction
which is not all that difficult. Remember you now have things like GPS to
help you out. Or use a star sight for N. and S. Figure amplitude on the
sun's rising and setting to find E. and W. Sounds much more intimidating
that it really is.

MST

One day left.