zem the head on flag indicates that uav 102 is on course to collide with the potential object of collision head on the alert avoid flag indicates that uav 102 is on course to enter in to some other type of collision both head on flag and alert avoid flag should activate auto avoid guidance 128 to avoid an object auto avoid guidance 128 receives the calculated parameters from avoid state calculator 124 the alert avoid flag as well as the head on indicator to override the existing guidance mode of uav 102 auto avoid guidance 128 maneuvers uav 102 by generating avoidance maneuver commands for flight controls 114 to avoid a collision and miss an approaching object by at least the predetermined miss distance auto avoid guidance 128 can also use an active transponder system used in commercial aviation to inject commands into auto avoid guidance module 128 in accordance with one embodiment auto avoid guidance 128 is programmed to make an avoidance maneuver according to the faa 39 s u201c rules of the road u201d for civilian aircraft operating in national air space nas in particular the avoidance maneuver complies with part 91 of the faa regulations and meets the faa 39 s collision avoidance systems final rule faa 2001 10910 487 and faa 2001 10910 489 after auto avoid guidance 128 completes.