I'm one of those drone pilots that only does a compass calibration when the drone shows it needs it. That's me. If you calibrate before every flight than that is you and not me. My Typhoon received a compass calibration when I received it long ago and has not had another one since that time. Normally I fly within 70 kilometers at various spots of the location where the compass was calibrated. This week I drove 500 kilometers east of my last calibration location. I took off in a tight spot (plenty of trees around) and took the bird above the trees to hover. There was almost no wind. The Typhoon began to drift which is a sign that it could benefit from a compass calibration. I compensated for the drifting and performed a manual POI (i.e., flew the bird in a big circle without automation) while capturing video footage of an object. Once completed I released the controls to hover and it remained rock solid. Apparently it had figured out any compass deviation and adjusted for it. Flew 4 more flights over 2 days and the Typhoon remained rock solid in the air. Nice! Second item was the No Fly Zone. I was in a large field about to takeoff when each press of the start button just produced a beep. Odd. The rear indicator light flashed white rapidly. I did a reboot of everything and this time I noticed that the ST16 flashed a screen which said I was in a NFZ. Really? I see no airport or special buildings.... I just see fields and trees. Well upon further inspection of the area there was indeed an airport about 3 kilometers in the woods used by the military for rotary wing aircraft. Thank you Google Maps satellite view or I'd still be scratching my head. So again, well done Yuneec.