ORIGINAL: RCFlyerDan
ORIGINAL: MajorTomski
Your approach of just creating a one time WRITTEN agreement with the airport authority/control tower, and constant use of spotters is probably the best approach.
MTC YMMV
Maj T! This is exactly what I am proposing to the Officers' and BOD of our Club.
I agree. There are too many different situations for one simple rule to cover adequately.
As for the difficulty in measuring altitudes, it's probably just a matter of time until models operating near airports will have to have telemetry installed, just as full-scale planes in some classes of airspace have to have transponders that show the controllers their altitude.