OTC does several things:
It makes all optics present a dimensionally correct image. A ship that is 450 feet long will subtend the proper angle in the periscope view, for example. So you can actually measure the mast height and calculate range.
It makes the optics display the proper magnification and field of view, so you see what you should be able to see.
It corrects for the fact that the optics are not located at the exact center of the boat's length.
It adds a range dial to the TDC, so you can easily enter range manually. Useful for manual targeting.
It couples the AoB input dial, so the solution dial moves with it when you are entering data.
It provides accurate range and bearing data on the radar scopes.
It allows you to adjust the optics views to be correct for your monitor's aspect ratio.
In short, it makes the entire fire control system, which you are trying to use to simulate the way attack solutions were determined, actually work, instread of just being eye candy.
An excellent mod!
|