Originally Posted by HoundDog

Simple Put them on the charts

At towered air ports Controllers/ATIS warns arriving and departing Pilots all the time of hazard to flight. Where there is a AWOS (Automatic Weather Observation Station) It has continues broad of weather and an announcement can be added to the end of the broadcast. i.e. 250' unlighted crane on the 248 degrees radial of xyz VOR or Active Model air plane field 2,9 miles @ 180 degrees from airport.






All towers/Power lines/ect. are charted on all VFR charts why not Chartered Model air plane fields. With all modern GPS's and Glass Panel planes those warnings come to the attention of the Pilot when they become a factor to safe flight.

Another way is that in 2020 all aircraft that have an electrical system must be equipped with ADS-B witch brodcasts a planes position speed heading and altitude to all other aircraft with in range. An ADS-B transmitter could be set up to tell aircraft there are air planes in the air.
See there are many ways to skin the CAT.