Currently, the calculate screen does not clearly show the degree of expected circular error based on the terrain-raycast slant angle. The software operator needs to be clearly and obviously informed on the category of expected circular error using a visual indicator such as color, prominent text output, or crosshair shape.
From Joint Publication 3-09.3 "Close Air Support" July, 2009 pg. V-4:
Currently, the calculate screen does not clearly show the degree of expected circular error based on the terrain-raycast slant angle. The software operator needs to be clearly and obviously informed on the category of expected circular error using a visual indicator such as color, prominent text output, or crosshair shape.