What is the exact, or a typical process, to aim the main gun on a modern battle tank? What are the individual steps and who does the work (a gunner? loader? computer? commander?)? How does the actual aiming (deciding on elevation etc.) happen, is this done by computer? If so, what is the role of the tank gunner? What influence does the tank crew have on hitting, or not?
Assume the target is visible.
An answer could look like a step by step - what is done, by whom, what could go wrong, repeat for each step.
The background of my question is this: Many pen&paper rpgs model operation of such weapons the same way as for smallarms: There's the skill of the gunner, the gun may provide some modifiers. But basically there's a check against the gunners skill. My gut feelign is that this is simply the wrong way to think about such weapons.