An Altitude Zone is an area of restricted flight altitude. Each of these zones consists of two parts. Part one is a 60-meter height-restricted area, which extends 3.6 km outwards from the four corners of a Restricted Zone at an angle of 8.5°. Part two is a 120-meter height-restricted area, which extends 8.4 km outwards from the corners of part one.
I'm right at the end of the altitude zone and limited to 120M which I never fly that high and I always keep the bird pretty much in my line of sight, so charlie why should I worry about losing my Mavic. or am I missing something.