[AVGWarhawk]

Yes, timeline for certain radar is modelled into the game. From what I gather using RFB it took some work to get a reasonable make up of the radar in use at the time it was available. From the numerous books I have read, the Japanese were not always diligent with their radar until very late war. Also, the could pick up the sub's radar beam so the US radar operators would turn the radar on and immediately turn them off so as not to be detected. I believe the USS Batfish used this technique when tracking and sinking 3 Japanese submarines. I also think this is modelled into the game as well. The best person to ask is LukeFF. He has spent a lot of time with the radar in game.