Abstract: An alert apparatus and an alert method implemented by said direct broadcast apparatus for protection against collisions with debris and the like found in the Earth's atmosphere or in space, said apparatus comprising: —a containing structure mounted outside or inside a body of an aircraft, of a space vehicle or of a flying object in general which moves through the atmosphere or the space, in which sensor means are housed that is arranged for checking a release of debris and the like, coming from said body following an explosion and/or ablation thereof that are dispersed in a hazard space (2) and/or arranged for checking conditions that are referable to said explosion and/or ablation and for detecting features of the hazard space (2), —a processing unit, arranged in the containing structure, connected to the sensor means for processing the features of the hazard space (2) in order to determine the extent and the dynamics of the hazard space (2); —transceiver means arranged for sending an output signal (B) carry