Like ddiplock, I leave my radar off the majority of the time, your radar warning is your real life saver. I`ve had plenty of aircraft warnings, don`t assume all radar warnings are ships, they`re not. Many times I`ve been attacked at night by radar, and searchlight equipted flying boats. It can be a real challenge late in the war, but remember even in early 1941 the Germans lost 3 of their top U-Boat Aces in the same month. So Happy Sailing, and stay alert.