Unmanned Aircraft Systems (UASs) have become an important and promising field of study in the aerospace industry. Their versatility and efficiency have led them to be used in a considerable number of different applications. Research in this field is constantly increasing their capabilities and with them the number of tasks they are able to perform. For instance, it is only recently that developments in autonomous driving, often supported by artificial intelligence algorithms, have allowed them to work independently from human intervention. This advancement has greatly improved the possibility of using UASs in critical environments where it would be difficult or dangerous for a human to intervene.