reconnaissance planes could have a radar system (albeit half the radius of a field dar) that displays enemy cons to the country as long as the recon plane is alive. could make it so where the pilot has only a certain amount of time he/she can broadcast the radar. (i.e. you have 500 seconds of radar time and you pull the trigger to engage it). Once its gone, its gone, unless the pilot rearms.
Not sure how historically accurate this would be as I don't know of any recon planes like the PBY Catalina or Piper Grasshopper being able to carry a radar system. I know the Germans had a variation of the AR234 that had an on board radar system, but that's all I know.
