Recently I came across this description about the fire control equipment on M60A3/TTS. It says that Azimuth corrections are applied to the LRF sight for the lead.
In the game, I find a confusing behavior of the fire control system. A lead does apply to the mirror after a range is fed from the LRF to the M21 ballistic computer, but the TC has to relay the gun and put the reticle back onto the target. Why does the gunner's periscope and the TTS has the lead applied without a need to relay the gun, but when the TC viewing through the LRF sight, he has to relay the gun to apply the lead?