Which term describes "Courses whose protected airspaces are coincident, overlap, or intersect and whose angular difference is 45 degrees through 135 degrees inclusive"?

The term "Crossing Courses" accurately describes courses that possess protected airspaces which are coincident, overlap, or intersect at angles ranging from 45 degrees to 135 degrees, inclusive. This terminology is essential in air traffic control to ensure the safe management of aircraft that may be operating in close proximity to each other. In this context, crossing courses refer specifically to scenarios where the paths of aircraft could potentially intersect, leading to a need for careful monitoring and separation to prevent mid-air collisions. Understanding this term helps controllers recognize situations where more stringent spacing and communication protocols may be necessary to maintain safety in the airspace system.