Take off in an A-143 Buzzard (CAS), and have a friend (or if you have the skill to make it happen using AI; which is highly unlikely) designate a group of vehicles for you to lock onto with the GBU-12 bomb. You will notice that it is difficult to tell what is being marked, whether you look at the HUD or radar, because both the HUD marker and the radar Icon that denotes a laser designation is identical to that of a vehicle.