Wait!!! 9,000 yards and 18,000 yards? Ouch...let me go think for a minute!
Thats a positive ID at 9,000 yards = 5 miles for friendly?
..........................and 18,000 yards = 10 Miles for enemy?
Thats a bit much for both isnt it isnt it?
In the heat of battle werent guys shooting their own airplanes at much closer distinces?