diff --git a/mods/ra/rules/misc.yaml b/mods/ra/rules/misc.yaml
index 0fa7e5d263..e172652d5a 100644
--- a/mods/ra/rules/misc.yaml
+++ b/mods/ra/rules/misc.yaml
@@ -144,15 +144,9 @@ camera.spyplane:
 		CloakTypes: Cloak, Hijacker
 
 SONAR:
-	AlwaysVisible:
-	Immobile:
-		OccupiesSpace: false
-	Health:
-		HP: 1000
-	ProximityCaptor:
-		Types: Sonar
+	Inherits: camera.spyplane
+	-RevealsShroud:
 	DetectCloaked:
-		Range: 10c0
 		CloakTypes: Underwater
 
 FLARE: