Sonar and radar usage

Originally Posted by PavelKirilovich

Contact, by association I wish they'd hear me launch torpedoes. I'm limited to compressed air launches here, water-ram ejection didn't happen until fairly recently, so they should at least have some idea that someone just shot at them when conditions are reasonable. The gramophone thing always gets me; though I do like singing "Lili Marleen" while being depthcharged.

The launch of a torpedo the same as door of torpedo tubes opening/closing should be also heard by hydrophone if ASW vessels crew is enough competent or elite I think. Also it should be rare event to detect you launching a torp, since sonar guy has to listen the right bearing (listening you) to trigger alarm on board and convoy around if there is one.