Patent ID: 8395533

Claim:
An anti-collision system for aircraft, said system comprising means of detecting collision with a threat and at least one head-up viewing device, said device comprising means of generating, collimating and superimposing the symbols on the external landscape intended to assist in the piloting of said first aircraft in the horizontal and vertical planes, said symbols being a scale of altitude, a scale of speed, the horizon and the flight director, wherein, when the threat is the terrain situated under the aircraft, the symbol system comprises two display modes dedicated to collision detection which are: an action mode: wherein a potential collision is detected by the system, and the symbol system also comprises a symbol representative of the limits of the disengagement path of the aircraft to avoid the collision and enabling the pilot to engage his avoidance maneuver; a control mode: wherein this mode is displayed when the avoidance maneuver is engaged and the collision avoided, and the symbol system comprises the symbol representative of the limits of the disengagement path of the aircraft and, in addition, a plan view representing the air space around the aircraft and including at least one representation of the threat, the symbol representative of the limits of the disengagement path comprising a horizontal bar representative of the minimum gradient necessary for the aircraft to succeed in its avoidance maneuver.