These terms are used interchangeably. RPAS means a Remotely Piloted Aircraft System. It is a relatively new term that has been adopted by ICAO (International Civil Aviation Organisation) to encompass an unmanned aerial vehicle (UAV) and everything involved in their operation including software, aircraft, and operation procedures. UAS means an Unmanned Aerial System. This term … Continue reading What is the difference between the terms RPAS, UAV, UAS and drone?