Fix aircraft defaults.

mods/cnc/rules/defaults.yaml

@@ -204,7 +204,7 @@
 		CruisingUpgrades: cruising
 		CanHover: True
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 	ActorLostNotification:
 	Explodes:
 		Weapon: HeliExplode
@@ -500,7 +500,7 @@
 	AppearsOnRadar:
 		UseLocation: yes
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 		AlwaysVisibleStances: None
 	ActorLostNotification:
 	AttackMove:

mods/d2k/rules/defaults.yaml

@@ -299,7 +299,7 @@
 	AppearsOnRadar:
 		UseLocation: true
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 		AlwaysVisibleStances: None
 	ActorLostNotification:
 	AttackMove:

mods/ra/rules/defaults.yaml

@@ -432,7 +432,7 @@
 		TargetTypes: Air
 		RequiresCondition: airborne
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 	AttackMove:
 	Guard:
 	Guardable:

mods/ts/rules/defaults.yaml

@@ -571,7 +571,7 @@
 	Voiced:
 		VoiceSet: Heli
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 	AttackMove:
 		Voice: Move
 	ActorLostNotification:
@@ -614,7 +614,7 @@
 	Armor:
 		Type: Heavy
 	HiddenUnderFog:
-		Type: CenterPosition
+		Type: GroundPosition
 	AutoTargetIgnore:
 	ScriptTriggers:
 	Tooltip: