that is pretty much it.
mag interference may or may not affect the calibration of the AC. Remember, the AC calibration is all about the AC not the things around it. So taking off, or flying thru mag interference may or may not change the AC signature. I guess it would always be prudent to verify map orientation before and during flight if there are any questions. You can see why calibration in a neutral environment is important, unless you plan on flying with that metal table attached.
mag interference may or may not affect the calibration of the AC. Remember, the AC calibration is all about the AC not the things around it. So taking off, or flying thru mag interference may or may not change the AC signature. I guess it would always be prudent to verify map orientation before and during flight if there are any questions. You can see why calibration in a neutral environment is important, unless you plan on flying with that metal table attached.