this whole radar thing throws reality out of the window. few planes even today have a map with a real-time God's-eye view of the action. i don't mind radar, but the radar towers should give the planes periodic radio messages of where enemy planes are like they did in real life. something like: "SHOWER, tower 5, contact ALPHA bearing 295, 300kts. vector is 270. probable hostile bomber." also, if a friendly gets within visual range of a plane it's assumed they radio back to HQ, so you'd get messages like "SHOWER, tower 5, HiTech IDs BETA as hostile snub 190." or "SHOWER, tower 5, NateDog reports GAMMA is down." if radar is bombed of course you stop getting messages.
my $.02
shower