Hi
Yes, you will hear from your Ra. Yes, the enemy can detect your radar signals as you can his. I mostly donīt use the radar as it seems that enemy planes home in on it. If you leave it off your radar detector will still work, giving you time to react. It detects the enemy's signal on greater distance than your radar detects any objects. The same is probably true from the enemy's end. Using the radar in high seas is mostly impossible as it switches off every time the conning tower gets drowned by a wave. I have had known contacts on the hydrophone that the radar has not detected when I surfaced. Maybe the later models have greater range but I did not try it, too many aircrafts around to take the risk. As for sonar I donīt know, never used it other than to get the depth under the keel. Hope this helps
