I once had a problem when I was helping in the training arena to teach gunnery in tanks - one of the issues was using film on distance shots - you had to literally slow down the film viewer until someone fired, then track it because the icons disappear at a distance.
One of the keys is being able to lock on an enemy tank and see YOUR icon so you can track your rounds and watch where they hit, many people jump to conclusion the tank game is broken because they "hit" the tank, but don't know where they hit.
