As a general rule I always calibrate my compass before lift off (I'm a safety kinda guy), however when I get to my next location which sometimes is 10 miles away, (once I was 40 miles from my last location) I turn everything on it tells me that my home point has been updated please check it on the map. I calibrate my compass regardless because I don't like taking chances, but does this mean its not necessary? Everything I've ever read says re-calibrate when you move to another location. I think when it says my home point has been updated please check it on the map means the satellites have found my new location but does excuse me from compass re-calibration. Am I correct?