Abstract: An apparatus for and a method of detecting a flight obstacle (28, 30, 32, 34) in the surroundings (50) of an aircraft (4), in particular for collision warning purposes, wherein images of the surroundings (50) are recorded, the flight obstacle (28, 30, 32, 34) is detected from the images and provided with an identification, and a signal (66, 68, 76) associated with the identification is outputted in a ground station (6). In order to guarantee a high level of certainty in respect to the control of the aircraft (4) which is effected automatically or by a ground control pilot it is proposed that detection and allocation of the identification are effected on board the aircraft (4) and the identification is sent to the ground station (6).