They should still know the relevant law instead of relying on technology. There isn't that much you need to know. In the UK, article 166 and potentially arti

They should still know the relevant law instead of relying on technology. There isn't that much you need to know. In the UK, article 166 and potentially article 167 of the Air Navigation Order (http://publicapps.caa.co.uk/modalapplication.aspx?appid=11&mode=detail&id=226 http://publicapps.caa.co.uk/modalapplication.aspx?appid=11&m...) are relevant. In any case, the drone should be within line of sight, lower than 400 feet above ground level, and not be in controlled airspace or near an airport (which should be checked on an aeronautical chart - they're only about £25 and look good on your wall). This gives a quick summary of both articles: http://www.independent.co.uk/news/uk/drone-rules-everything-you-need-to-know-to-fly-domestic-drones-legally-a6994291.html http://www.independent.co.uk/news/uk/drone-rules-everything-... And bear in mind that there are cases where pilots might be flying light aircraft well below 400 feet AGL away from an aerodrome: during ag operations (crop dusting), during a forced landing, or during a practice forced landing under instruction, so even with the ANO rules there's still potential (albeit unlikely) conflict.