Oh, I see, I was mistaken about what those arcs do. But still, that situation is not what I have here.
Pardon me if I'm failing to understand your point, but what I want the infantry to do, is to actually engage infantry in that arc as well, but I want them to use small arms and preserve their rockets. The above lines from the manual suggest that target armour arc makes your unit only target armour in that arc, which is not what I want.