Near miss can be a confusing phrase, but it means a miss where the objects (or planes here) were very near each other. With that context, a near collision wouldn't make sense as there's no way to have a collision where the objects are just near each other (as opposed to contacting each other).
Near miss can be a confusing phrase, but it means a miss where the objects (or planes here) were very near each other. With that context, a near collision wouldn't make sense as there's no way to have a collision where the objects are just near each other (as opposed to contacting each other).