The following code allows you to cloak your airfield:
Code:
Behavior = StealthUpdate ModuleStealth_E1
StealthDelay = 2500 ; msec
StealthForbiddenConditions = ATTACKING USING_ABILITY TAKING_DAMAGE
InnateStealth = No ;Requires upgrade first
OrderIdleEnemiesToAttackMeUponReveal = Yes
End
Behavior = StealthUpgrade ModuleStealth_E2
TriggeredBy = Upgrade_GLACamoNetting
END
This cloaking ability however, does not include your uncloaked aircrafts. Any human that see your aircrafts on the ground can simply determine that they are on a cloaked airfield.