Since I have some experience with this I will try and give my two cents. You are talking about one tank and tanks very rarely fight by themselves. At the lowest they will fight as a pair, but usually as a platoon of four.
Each tank will be given an arc on the clock, like fighter planes, to cover. Their gunners will continuously scan this arc until contact is made and then the platoon will react accordingly.
I tried to put a wedge formation in the post but it didn't work, so I can't help you visualize this.
[ March 22, 2002, 07:31 PM: Message edited by: Jwirry ]