diff --git a/Moose Development/Moose/Wrapper/Controllable.lua b/Moose Development/Moose/Wrapper/Controllable.lua
index f2eba2f43..79d45ee33 100644
--- a/Moose Development/Moose/Wrapper/Controllable.lua	
+++ b/Moose Development/Moose/Wrapper/Controllable.lua	
@@ -5642,19 +5642,18 @@ end
 -- @param #number Runtime (Optionally) Run this IR Marker for the given number of seconds, then stop. Use in conjunction with EnableImmediately.
 -- @return #CONTROLLABLE self
 function CONTROLLABLE:NewIRMarker(EnableImmediately, Runtime)
-  --sefl:F("NewIRMarker")
-    if self.ClassName == "GROUP" then
+  self:T2("NewIRMarker")
+    if self:IsInstanceOf("GROUP") then
+      if self.IRMarkerGroup == true then return end
       self.IRMarkerGroup = true
       self.IRMarkerUnit = false
-    elseif self.ClassName == "UNIT" then
+    elseif self:IsInstanceOf("UNIT") then
+      if self.IRMarkerUnit == true then return end
       self.IRMarkerGroup = false
       self.IRMarkerUnit = true
     end
-
-    self.spot = nil
-    self.timer = nil
-    self.stoptimer = nil
     
+    self.Runtime = Runtime or 60
     if EnableImmediately and EnableImmediately == true then
       self:EnableIRMarker(Runtime)
     end
@@ -5667,19 +5666,23 @@ end
 -- @param #number Runtime (Optionally) Run this IR Marker for the given number of seconds, then stop. Else run until you call `myobject:DisableIRMarker()`.
 -- @return #CONTROLLABLE self 
 function CONTROLLABLE:EnableIRMarker(Runtime)
-  --sefl:F("EnableIRMarker")
+  self:T2("EnableIRMarker")
     if self.IRMarkerGroup == nil then
       self:NewIRMarker(true,Runtime)
       return
     end
     
-    if (self.IRMarkerGroup == true) then
-        self:EnableIRMarkerForGroup()
+    if self:IsInstanceOf("GROUP") then
+        self:EnableIRMarkerForGroup(Runtime)
         return
     end
-
+    
+    if self.timer and self.timer:IsRunning() then return self end
+    
+    local Runtime = Runtime or self.Runtime
     self.timer = TIMER:New(CONTROLLABLE._MarkerBlink, self)
     self.timer:Start(nil, 1 - math.random(1, 5) / 10 / 2, Runtime) -- start randomized
+    self.IRMarkerUnit = true
     
     return self
 end
@@ -5688,14 +5691,13 @@ end
 -- @param #CONTROLLABLE self
 -- @return #CONTROLLABLE self 
 function CONTROLLABLE:DisableIRMarker()
- --sefl:F("DisableIRMarker")
-    if (self.IRMarkerGroup == true) then
+ self:T2("DisableIRMarker")
+    if self:IsInstanceOf("GROUP") then
         self:DisableIRMarkerForGroup()
         return
     end
 
       if self.spot then
-          self.spot:destroy()
           self.spot = nil
       end
       if self.timer and self.timer:IsRunning() then
@@ -5703,9 +5705,9 @@ function CONTROLLABLE:DisableIRMarker()
           self.timer = nil
       end
 
-    if self.ClassName == "GROUP" then
+    if self:IsInstanceOf("GROUP") then
       self.IRMarkerGroup = nil
-    elseif self.ClassName == "UNIT" then
+    elseif self:IsInstanceOf("UNIT") then
       self.IRMarkerUnit = nil
     end
 
@@ -5714,14 +5716,17 @@ end
 
 --- [GROUND] Enable the IR markers for a whole group.
 -- @param #CONTROLLABLE self
+-- @param #number Runtime Runtime of the marker in seconds
 -- @return #CONTROLLABLE self 
-function CONTROLLABLE:EnableIRMarkerForGroup()
-  --self:F("EnableIRMarkerForGroup")
-  if self.ClassName == "GROUP" then
+function CONTROLLABLE:EnableIRMarkerForGroup(Runtime)
+  self:T2("EnableIRMarkerForGroup")
+  if self:IsInstanceOf("GROUP") 
+  then
     local units = self:GetUnits() or {}
     for _,_unit in pairs(units) do
-      _unit:EnableIRMarker()
+      _unit:EnableIRMarker(Runtime)
     end
+    self.IRMarkerGroup = true
   end
   return self
 end
@@ -5730,8 +5735,8 @@ end
 -- @param #CONTROLLABLE self
 -- @return #CONTROLLABLE self 
 function CONTROLLABLE:DisableIRMarkerForGroup()
-  --sefl:F("DisableIRMarkerForGroup")
-  if self.ClassName == "GROUP" then
+  self:T2("DisableIRMarkerForGroup")
+  if self:IsInstanceOf("GROUP") then
     local units = self:GetUnits() or {}
     for _,_unit in pairs(units) do
       _unit:DisableIRMarker()
@@ -5745,15 +5750,15 @@ end
 -- @param #CONTROLLABLE self
 -- @return #boolean outcome
 function CONTROLLABLE:HasIRMarker()
-  if self.IRMarkerGroup == true or self.IRMarkerUnit == true then return true end
+  self:T2("HasIRMarker")
+  if self.timer and self.timer:IsRunning() then return true end
   return false
 end
 
---- [Internal] This method is called by the scheduler after disabling the IR marker.
+--- [Internal] This method is called by the scheduler to blink the IR marker.
 function CONTROLLABLE._StopSpot(spot)
     if spot then 
         spot:destroy() 
-        spot=nil 
     end
 end
 
@@ -5761,7 +5766,7 @@ end
 -- @param #CONTROLLABLE self
 -- @return #CONTROLLABLE self 
 function CONTROLLABLE:_MarkerBlink()
-  --sefl:F("_MarkerBlink")
+  self:T2("_MarkerBlink")
     if self:IsAlive() ~= true then
         self:DisableIRMarker()
         return
@@ -5772,7 +5777,8 @@ function CONTROLLABLE:_MarkerBlink()
     local _, _, unitBBHeight, _ = self:GetObjectSize()
     local unitPos = self:GetPositionVec3()
 
-    if not self.spot then
+    if self.timer:IsRunning() then
+        self:T2("Create Spot")
         local spot = Spot.createInfraRed(
             self.DCSUnit,
             { x = 0, y = (unitBBHeight + 1), z = 0 },