S-class and SD Radar in 1942

[Deathfrombelow23]

I just installed SD radar in my S-class boat. It's late February and I'm beginning my 3rd war patrol. I can't see any lines on the SD screen to indicate that it's on... and hitting the ON switch doesn't seem to do anything. Any tips?? :damn: :damn:

[orangenee]

The SD radar isn't actually modelled into the game, it just works by the operator telling you there's a plane coming and how far away it is. The radar screen in the sub is for the SJ radar.