diff --git a/mods/ra2/rules/allied-naval.yaml b/mods/ra2/rules/allied-naval.yaml
index 492f5c6a5..892d4b7bf 100644
--- a/mods/ra2/rules/allied-naval.yaml
+++ b/mods/ra2/rules/allied-naval.yaml
@@ -175,10 +175,10 @@ dlph:
 		UncloakOn: Damage
 		IsPlayerPalette: true
 	Targetable:
-		TargetTypes: Ground, Water
+		TargetTypes: Ground, Water, ImmuneToAllySonic
 		RequiresCondition: underwater
 	Targetable@underwater:
-		TargetTypes: Underwater
+		TargetTypes: Underwater, ImmuneToAllySonic
 		RequiresCondition: underwater
 	DetectCloaked:
 		CloakTypes: Underwater
diff --git a/mods/ra2/weapons/zaps.yaml b/mods/ra2/weapons/zaps.yaml
index 61fb28f0a..bc38532f0 100644
--- a/mods/ra2/weapons/zaps.yaml
+++ b/mods/ra2/weapons/zaps.yaml
@@ -69,11 +69,10 @@ SonicZap:
 	Range: 6c0
 	Report: vdolatta.wav
 	ValidTargets: Water, Underwater
-	Burst: 2
 	Projectile: AreaBeam
-		Speed: 1c0
-		Duration: 10
-		DamageInterval: 5
+		Speed: 0c256
+		Duration: 5
+		DamageInterval: 1
 		Width: 0c512
 		Shape: Flat
 		ZOffset: 2047
@@ -102,6 +101,7 @@ SonicZap:
 			Concrete: 60
 		DamageTypes: Prone50Percent, TriggerProne, ExplosionDeath
 		ValidTargets: Water, Underwater
+		InvalidTargets: ImmuneToAllySonic
 
 PrismShot:
 	ReloadDelay: 1