RTB = Return to Base (land)
GK or NK = Good kill/nice kill
<S> = Salute! (Good fight, well flown)
[don't see this often enough in main]
Out = Exiting out of the fight, (damage, fuel, ammo, need to rebuild Energy, grabbing alt, etc)
Goon, goony = C-47 (nicknamed goony birds)
Troop transport
cc or vv = copy, I understand
(taken from flight of the navigator, double mike click= confirm, copy, understood, etc)
Jabo = Hvy fighter loaded for ground targets, bombs, rockets etc.
Buff = Big Ugly Fat F##ker, Bomber, lancaster, b17, etc
CAS = Close Air Support (Fighter cover over ground vehicles
CAP = Combat Air Patrol (ie need cap a33 = need fighters to cap field 33 for field capture.
GV = Ground Vehicle, Panzer, ostwind,M16, etc
FH = Fighter Hanger
BH = Bomber Hanger
VH = Vehicle Hanger
AGL = Above Ground Level (Troops need to be dropped 800 feet AGL)
AA = Anti Aircraft gun or fire
AAA or Flak = Anti Aircraft Artillery (the black puffs)