Carl Westin

B-2 Constructing the solution space 195 Protected zone Conflict zone Intruder aircraft B Controlled aircraft A - V 2 V 2 V 1 V relative (a) Conflict geometry in relative space - V 2 V 2 V 1 Current speed V min V max (b) Conflict geometry in absolute space No-go zone Aircraft symbol with speed (history) dots) (c) SSD for controlled aircraft F IGURE B-2: The SSD representation in a conflict between two aircraft. ing abstract SSD visualization, as an example of how it can be integrated with an ATC radar display. The partly shown conflict zone of aircraft B , referred to as the no-go zone , is visualized within the maximum V max and minimum V min speeds of aircraft A’s maneuver envelope. The no-go zones provide the boundaries for safe travel. The size and position of the no-go zone reflect the relative position, velocity, and proximity of aircraft B . The angle between the legs of the triangle provides in- formation on the relative proximity of aircraft B . The direction to which the triangle is convex (i.e., expands in width) represents the direction from which aircraft B is