Unmanned Air Vehicles (UAVs) are becoming more and more important in our lives. UAVs, light and heavy, are playing an important role in the modern battle field. The technology which is developed for military purposes is slowly moving toward civilian applications. UAVs can be considered as “flying robots” with the capability to perform missions autonomously or under the remote control of a human operator. Latest UAV technology allows it to operate at different regions of the world and to send information and receive commands from a single protected ground station. The modern UAVs utilize state of the art airframe structures, efficient aerodynamic design, efficient propulsion systems, innovative electro optical sensors, long range communication devices and the latest computers technology.