This is the template for the whiz wheel to be printed out & made.
http://www.gamefront.com/files/KM_Wi.../fileinfo.html
It seems OLC's targeting wheel is different though and both are needed. The olc targeting wheel basically went around your attack peri. I found a pic:
The real life kaleun had this exact wheel, a metal slider they used to calculate distance, speed, and aob to feed into the TDC.
OLC made a youtube vid with a nifty tutorial. I'll hunt it down later tonight.