Unmanned aircraft comprising: a GPS receiver which is configured to receive a GPS signal defining a desired landing zone for the unmanned aircraft ; a transponder which is configured to transmit a position signal defining a current position of the unmanned aircraft and is also configured to receive a position correction signal if the current position of the unmanned aircraft differs from a desired position; a light signal receiver which is configured to receive a light signal defining the desired landing zone for the unmanned aircraft ; a foldable basic body ; and a control system for autonomously controlling the unmanned aircraft , which control system is configured (i) to control a landing approach of the unmanned aircraft to the desired landing zone at least in a first phase of the landing approach on the basis of the GPS signal received by the GPS receiver , (ii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a second phase of the landing approach following the first phase on the basis of the position correction signal received by the transponder , and (iii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a third phase of the landing approach following the second phase on the basis of the light signal received by the light signal receiver . a GPS receiver which is configured to receive a GPS signal defining a desired landing zone for the unmanned aircraft ; a transponder which is configured to transmit a position signal defining a current position of the unmanned aircraft and is also configured to receive a position correction signal if the current position of the unmanned aircraft differs from a desired position; a light signal receiver which is configured to receive a light signal defining the desired landing zone for the unmanned aircraft ; a foldable basic body ; and a control system for autonomously controlling the unmanned aircraft , which control system is configured (i) to control a landing approach of the unmanned aircraft to the desired landing zone at least in a first phase of the landing approach on the basis of the GPS signal received by the GPS receiver , (ii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a second phase of the landing approach following the first phase on the basis of the position correction signal received by the transponder , and (iii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a third phase of the landing approach following the second phase on the basis of the light signal received by the light signal receiver . (i) to control a landing approach of the unmanned aircraft to the desired landing zone at least in a first phase of the landing approach on the basis of the GPS signal received by the GPS receiver , (ii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a second phase of the landing approach following the first phase on the basis of the position correction signal received by the transponder , and (iii) to control the landing approach of the unmanned aircraft to the desired landing zone at least in a third phase of the landing approach following the second phase on the basis of the light signal received by the light signal receiver . <EOS>