Hi, this was actually a TV mast and the frequencies are way down the spectrum from where we are in the inspire. I personally think the mast is a red herring but who knows. The RTH was displayed on the iPad before it fell to the ground but whether the RTH had been initialised or whether it was just displayed because it had lost all communication, I don't know. One person on another forum thought that the cup or a component had been "fried" by the signal, interestingly l have now powered up the inspire and despite looking rather sad, it is working apart from the camera which it landed on! All systems check fine, gps is there and all motors start up fine!!!!!!