diff --git a/MissileLauncher/Program.cs b/MissileLauncher/Program.cs
index 0bcea26..1116d01 100644
--- a/MissileLauncher/Program.cs
+++ b/MissileLauncher/Program.cs
@@ -185,12 +185,14 @@ namespace IngameScript
         public const double HYDRO_TANK_FILLED_PERCENT = 20;
 
         const string LAUNCHER_SMALL_CONNECTOR_NAME = "Connector Launcher"; // Following by a number: "01", "02", etc.
+        const string DOORS_MISSILES_GROUP = "Doors Missiles";
 
         const float EPSILON = 0.05f;
 
         readonly Output output;
 
         readonly List<Launcher> launchers = new List<Launcher>();
+        readonly IEnumerable<IMyDoor> missilesDoors;
 
         int nbLaunched = 0;
         int nextToLaunch = 0;
@@ -203,6 +205,13 @@ namespace IngameScript
             this.output = new Output(output);
             this.output.Print("Missile launcher system starting...");
 
+            this.missilesDoors = Utils.GetBlocksFromGroup<IMyDoor>(this.GridTerminalSystem, String.Format("{0} {1}", GRID_PREFIX, DOORS_MISSILES_GROUP));
+            if (missilesDoors.Count() == 0)
+            {
+                this.output.Print("No missile doors found: Aborted");
+                return;
+            }
+
             var connectorNamePrefix = String.Format("{0} {1} ", GRID_PREFIX, LAUNCHER_SMALL_CONNECTOR_NAME);
 
             // Find all launcher sub-grid and create the associated launcher.
@@ -225,6 +234,16 @@ namespace IngameScript
 
         void LaunchNext()
         {
+            // Check if the hangar door is open.
+            foreach (var missileDoor in this.missilesDoors)
+            {
+                if (missileDoor.Status != DoorStatus.Open)
+                {
+                    this.output.Print("Can't launch when missile doors are closed: Aborted");
+                    return;
+                }
+            }
+
             if (this.launchers.Count > 0)
             {
                 this.launchers[this.nextToLaunch].Launch();