Well, I am from the USA and I see no code or even a hint in that article and letter that causes me to be afraid. And it's absurd and condescending to say that anyone from another country is incapable of reading and understanding it.
The letter...
the guy was launching and landing from where he was staying at a cabin in the park.
Far as the 'fog', he has other versions of his video that demonstrate him flying up through the layer. Unless he was on the side of a mountain where he could...
A state may legally prohibit launching, landing, and operating drones in its parks, but a state lacks the jurisdiction to regulate use of the nation's airspace above those parks. That's solely the FAA's responsibility. Thus, it should be...
Thanks! I cancelled auto landing a couple of times because I couldnt get it near my takeoff spot. I noticed early on that it showed downward obstacle avoidance of 1.4m (I believe) so I couldnt move down. Did it think there was a surface below it...