Unmanned Aircraft Systems (UAS) is an emerging technology with an enormous potential to revolutionize the world and enable new technological applications. It is part of future integral applications, urban, civil and military. The technological maturity is enough to be integrated into civil society. The importance of UAS in scientific applications has been demonstrated extensively in recent years. Whatever the type of selected missions is, their number and their use will increase significantly in the future. RSUs are playing a growing role in many public missions such as monitoring borders, wildlife surveys, military training, real-time monitoring and enforcement of local law. Challenges such as the lack of an onboard pilot to see and avoid other aircrafts and the large variety of missions and capabilities of unmanned aircraft must be addressed in order to fully integrate UAS operations in the context of the next generation. Drones are better suited to difficult or dangerous missions than manned aircraft. Information and monitoring services use drones primarily for intelligence, surveillance and reconnaissance, border security, the insurgency against the attack and strike, identification and target designation, the relay communication, electronic attack, mapping and meteorology.?The Unmanned Aircraft (AU) which is plane without a pilot on board, can be a remote controlled aircraft (for example, controlled by a driver to a ground control station) or may fly autonomously on preprogrammed flight plans according to a path in the XY plane or in the orthonormal X, Y, Z or more complex dynamic automation systems. It can carry a lethal or non-lethal payload, which can be high and low resolution video cameras, day reconnaissance equipment and night, crop-spraying system, 3D scanner for mapping, weapons of war and generally any equipment necessary for the mission for whom the drone is designed.