diff --git a/resources/scripts/weapons/weapon_frigate_naval_gun.js b/resources/scripts/weapons/weapon_frigate_naval_gun.js
index 592c2a60f..e3169003e 100644
--- a/resources/scripts/weapons/weapon_frigate_naval_gun.js
+++ b/resources/scripts/weapons/weapon_frigate_naval_gun.js
@@ -4,6 +4,10 @@ var Constructor = function()
     {
         return qsTr("Naval gun");
     };
+    this.getEnviromentDamage = function(enviromentId)
+    {
+        return 20;
+    };
     this.damageTable = [// ships
                         ["GUNBOAT", 75],
                         ["CANNONBOAT", 75],
diff --git a/resources/scripts/weapons/weapon_gunboat_naval_gun.js b/resources/scripts/weapons/weapon_gunboat_naval_gun.js
index 9e421dd87..dd1e0a255 100644
--- a/resources/scripts/weapons/weapon_gunboat_naval_gun.js
+++ b/resources/scripts/weapons/weapon_gunboat_naval_gun.js
@@ -4,6 +4,10 @@ var Constructor = function()
     {
         return qsTr("Naval gun");
     };
+    this.getEnviromentDamage = function(enviromentId)
+    {
+        return 10;
+    };
     this.damageTable = [["GUNBOAT", 55],
                         ["CANNONBOAT", 55],
                         ["BLACK_BOAT", 55],