Abstract: An acoustic collision detection system that enables an aircraft to detect an approaching target, recognize the potential for collision and change course to maintain a safe separation distance, with or without operator invention. The acoustic collision detection system consists of an array of acoustic probes and a digital signal processor which receives acoustic data from the approaching target. The digital signal processor is configured to receive acoustic data from the array of acoustic probes; filter out noise and its own acoustic signals; extract the acoustic signals emanating from the approaching target; calculate the intensity, the bearing and the bearing angle rate of change of the approaching target, and determine whether the aircraft and the approaching target are on a potential collision course.

Abstract: In accordance with the present invention, a store covering for reducing the radar observability of an externally mounted store is provided with a non-rigid body covering. The body covering is provided with a radar reflective material. The body covering is formed to fit around a portion of the externally mounted store. The body covering is in slidable engagement and disengagement about at least a portion of the externally mounted store to allow repeated installation and removal.