[TorpX]

Originally Posted by smoothsailing

Well then how would input to the tdc when using only the radar.Since there is no way to do it other than the hydrophone tdc switch,I guess you cant fire torpedo with just the radar,I will have to send a ping,right?

I know it is a newby question but I have been in weather where I couldn`t see to get a visual.

Haven't used SH 4 radar, but I would try this:

Use the slide out panals of the periscope TDC, enter the range, bearing and speed. Make sure you click the button and the TDC "receives" the information. This should work, I think. You don't need to raise the scope to do this.