Autopilots for Unmanned Aerial Vehicles (UAV) or Drones; Navigation apparatus and system for Unmanned Aerial Vehicles (UAV) or Drones comprising of circuit boards, integrated circuits, electronic circuits, electric sensors, proximity sensors, GPS antenna, data processors, digital signal processors, and embedded software for altitude solution and flight controls; Electronic components for Unmanned Aerial Vehicles (UAV) or Drones, namely, datalink electronic transmitters for communications, aut...