diff --git a/scripts/shiptemplates/40k/Croiseurs.lua b/scripts/shiptemplates/40k/Croiseurs.lua
index 48cff1e7fb..1b6dc09b4c 100644
--- a/scripts/shiptemplates/40k/Croiseurs.lua
+++ b/scripts/shiptemplates/40k/Croiseurs.lua
@@ -1098,6 +1098,7 @@ template:registerSquadronComposition("Ch", 5, 15, "Chasseur Mk2", "Chasseur", "C
 template:registerSquadronComposition("Ch2", 5, 15, "Chasseur Mk2", "Chasseur", "Chasseur","Chasseur")
 template:registerSquadronComposition("Ch3", 5, 15, "Chasseur Mk2", "Chasseur", "Chasseur","Chasseur")
 template:registerSquadronComposition("Ch4", 5, 15, "Chasseur Mk2", "Chasseur", "Chasseur","Chasseur")
+template:setBlueprintAvailable("Ch", "Ch3")
 
 --Dock/balise de renfort de la marine
 
diff --git a/src/shipTemplate.cpp b/src/shipTemplate.cpp
index 5712d13245..516c150914 100644
--- a/src/shipTemplate.cpp
+++ b/src/shipTemplate.cpp
@@ -349,12 +349,16 @@ REGISTER_SCRIPT_CLASS(ShipTemplate)
     /// Defaults to true.
     /// Example: template:setCanLaunchProbe(false)
     REGISTER_SCRIPT_CLASS_FUNCTION(ShipTemplate, setCanLaunchProbe);
-    ///Registers a new squandron type
+    ///Registers a new squandron type (this is a kind of Blueprint)
     ///First argument registers the name of the squadron, this is an identifier (for instance "Interceptors")
     ///Second argument is maximum number of squadrons (ex: 5)
     ///Third argument is creation duration in seconds (ex : 30)
     ///Other arguments register the ship class name (for instance "Light Fighter Defiant class", "Viper", ...)
     REGISTER_SCRIPT_CLASS_FUNCTION(ShipTemplate, registerSquadronComposition);
+    ///Sets a blueprint available. By default, all blueprints are deactivated and not available for player
+    ///You can specify a SquadronComposition name here, or any list.
+    ///ex : setBlueprintAvailable("Ch", "Ch1", "Interceptors")
+    REGISTER_SCRIPT_CLASS_FUNCTION(ShipTemplate, setBlueprintAvailable);
 
     /// Returns an exact copy of this ShipTemplate and sets the new copy's reference name to the given name, as ShipTemplate:setName().
     /// The copy retains all other traits of the copied ShipTemplate.
diff --git a/src/shipTemplate.h b/src/shipTemplate.h
index ab4a5e93a9..79f221ad89 100644
--- a/src/shipTemplate.h
+++ b/src/shipTemplate.h
@@ -285,6 +285,19 @@ class ShipTemplate : public PObject
         squadrons_compositions.push_back(sqt);
     }
 
+    void setBlueprintAvailable(const std::vector<string>& squadron_name)
+    {
+        std::unordered_set<string> template_names(squadron_name.begin(), squadron_name.end());
+        for(auto &sqt : squadrons_compositions)
+        {
+            if(template_names.find(sqt.template_name) != template_names.end())
+            {
+                sqt.available = true;
+                template_names.erase(sqt.template_name);
+            }
+        }
+    }
+
 public:
     static P<ShipTemplate> getTemplate(string name);
     static std::vector<string> getAllTemplateNames();