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.