If you use a compass stick it up the top of a mast so its well away from the motors and other iron+steel.
Indoors you'll always have some magnetic disturbance, but on average it should be OK unless you are
near an NMR lab or the LHC!
If you use a compass stick it up the top of a mast so its well away from the motors and other iron+steel.
Indoors you'll always have some magnetic disturbance, but on average it should be OK unless you are
near an NMR lab or the LHC!