Yes that is correct. Calibrating the compass in a magnetic compromised area won't do any good. It just takes the data of that altered magnetic field as normal one. So you put the drone in a condition that normal magnetic field on a different location could be recognized as not normal, therefore you can have problems then. Automatic switch to ATTI is safety measure against compass problems. Of course you must noticed that and fly according to that ATTI situation - manually. If there is rather windy doing nothing would cause the craft to fly with the wind. If you get interference at take off location just pack and go to a different one and everything will be normal without calibration. I fly 3A and 4P for more than three years now and never do a compass calibration.
But there can be a radio frequency interference as well. The cure is equal.
There seems to be two distinct groups : Those of us that do not need to do compass calibration and those that do.
Because we as Pilots all fly with different firmware , the story will not be the same for everyone.
Having the right firmware as many of us know is key:
The first thing I do in every flight before taking off is to check the sensors. Sometimes I get a calibrate compass prompt but it is due to interference. Then I move the drone and see if the compass sensor comes back to normal. Do I have to turn off and turn on the drone in that situation as suggested in this thread or not? I usually move the drone while it is on and find a spot without interference and take off. Is this correct?
The first thing I do in every flight before taking off is to check the sensors. Sometimes I get a calibrate compass prompt but it is due to interference. Then I move the drone and see if the compass sensor comes back to normal. Do I have to turn off and turn on the drone in that situation as suggested in this thread or not? I usually move the drone while it is on and find a spot without interference and take off. Is this correct?
Can't a modification be made to the Phantom Wet Suit design to protect from rain AND all compass interference? ;-)NO you should turn the drone off and than move and restart. This will give you the best odds of a successful flight.
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