Abstract: A method for monitoring an object (20) in the environment of an aircraft (10) on the ground (2), having the steps of: transmitting a communication signal between a communication device arranged on the object (20), in particular a land vehicle, and at least one communication device spatially allocated to the aircraft (10) on the ground (2), and determining spatial location information relating to the object (20) on the basis of the transmitted communication signal. In addition, a device having an interface which is configured to read in data based on the communication signal transmitted between the communication devices, and a determination unit which is configured to determine spatial location information relating to the object (20) on the basis of the data which have been read in. Furthermore, a system for monitoring an object (20) in the environment of an aircraft (10) on the ground (2), having such a device.