Originally Posted by
FUTABA-RC
So 393.7 feet to 492.1 feet. Seems 400 feet is towards the low end of what other countries do.
The US makes provision currently allow flight above 400 in controlled airspace if approved by FAA. I don't recall seeing any such provision in other countries. Hence if the US moves to harmonize with other countries regs, I could see that provision going away entirely.