Seem dodgy.
For example, the other day I noticed a base flashing with radar down and nothing on bardar, no vehicle spawns to the field so I figured it must be an NOE raider.....so I upped to defend from another field nearby and headed straight for the flashing airfield. I got to around 5 miles away with still nothing showing on dar when suddenly a bardar appeared. Ok, so the NOE raider must have just popped up....however, not 10 seconds later an N1K appeared at 13,000ft.
I have this on film, but the film doesnt show my clipboard map.