I made/used this in one of my missions and since I've had multiple people asking for it. Here it is.
I wanted to make a mission with insurgents mortaring a base, but I wanted it to be more challenging and realistic than the fancy satellite map targeting system you get from the Artillery module (I doubt the takibans have such things ) or a silly map click system.
This little script waits for the player to get in to a mortar (vehicle type defined as parameter) and then just displays the current azimuth and elevation. This makes map reading and having forward observers more important.
You probably want to make your own ballistics tables to help the players. Here are mine, for the Podnos: