diff --git a/OpenRA.Mods.RA/Combat.cs b/OpenRA.Mods.RA/Combat.cs
index 1f2658f352..fc6c371da5 100755
--- a/OpenRA.Mods.RA/Combat.cs
+++ b/OpenRA.Mods.RA/Combat.cs
@@ -39,7 +39,7 @@ namespace OpenRA.Mods.RA
 			if (!world.Map.IsInMap(targetTile))
 				return;
 
-			var isWater = pos.Z == 0 && world.GetTerrainInfo(targetTile).IsWater;
+			var isWater = pos.Z <= 0 && world.GetTerrainInfo(targetTile).IsWater;
 			var explosionType = isWater ? warhead.WaterExplosion : warhead.Explosion;
 			var explosionTypePalette = isWater ? warhead.WaterExplosionPalette : warhead.ExplosionPalette;
 
diff --git a/mods/ra/weapons.yaml b/mods/ra/weapons.yaml
index fb287567cb..d064caebbe 100644
--- a/mods/ra/weapons.yaml
+++ b/mods/ra/weapons.yaml
@@ -1168,8 +1168,10 @@ UnitExplodeSmall:
 			Light: 60%
 			Heavy: 25%
 		Explosion: large_explosion
+		WaterExplosion: large_splash
 		InfDeath: 4
 		ImpactSound: kaboom15.aud
+		WaterImpactSound: splash9.aud
 
 BarrelExplode:
 	Warhead: