I am going to be doing some filming at 13900 feet....... however I am taking off at 12300/12600. There is no airplanes or helicopters because of the high peaks that I am going to be flying around.
I am doing as much research as I can to find out how things work at that altitude with these drones and would greatly appreciate any input from the audience.
The flight rules are AGL, not MSL. If you're taking off at Angels12.3, then the theoretical max is 12.7. However, contact the tower and let them know your intentions. I've yet to be told "no" and many of my flights are within the meridian of international airports. You can find the local tower number on the web or in any number of apps.