@TheWanderer
"Reliability or functionality of UAV is competely irrelevant, if one is unable to program or reprogram it."
Well that depends on the nature of the program I suppose. Anyway, on the types I operate, it would be much more convenient to don the blindfold and then trip over the datalink power supply cable. On loss of comms, home it comes. Of course we can make it do other tricks, and indeed it doesn't need the datalink at all anyway. Perhaps after having tripped over and still with blindfold, I could use my cellphone to call a friend, the datalink is networked via cellnet and satellite, so any friend anywhere in the world with the ground-station software will do. Then again, we are working to develop voice command, "I think you said, Return to Home, is that correct?"