Controllable/Beacon - added function to switch on Link4

A2A - typo in documentation

Moose Development/Moose/Wrapper/Controllable.lua

@@ -697,6 +697,34 @@ function CONTROLLABLE:CommandActivateICLS( Channel, UnitID, Callsign, Delay )
   return self
 end
 
+--- Activate LINK4 system of the CONTROLLABLE. The controllable should be an aircraft carrier!
+-- @param #CONTROLLABLE self
+-- @param #number Frequency Link4 Frequency in MHz, e.g. 336
+-- @param #number UnitID The ID of the unit the ICLS system is attached to. Useful if more units are in one group.
+-- @param #string Callsign Morse code identification callsign.
+-- @param #number Delay (Optional) Delay in seconds before the ICLS is deactivated.
+-- @return #CONTROLLABLE self
+function CONTROLLABLE:CommandActivateLink4(Frequency, UnitID, Callsign, Delay)
+
+  -- Command to activate Link4 system.
+  local CommandActivateLink4= {
+    id = "ActivateLink4",
+    params= {
+      ["frequency "] = Frequency*1000,
+      ["unitId"] = UnitID,
+      ["name"] = Callsign,
+    }
+  }
+
+  if Delay and Delay>0 then
+    SCHEDULER:New(nil, self.CommandActivateLink4, {self}, Delay)
+  else
+    self:SetCommand(CommandActivateLink4)
+  end
+
+  return self
+end
+
 --- Deactivate the active beacon of the CONTROLLABLE.
 -- @param #CONTROLLABLE self
 -- @param #number Delay (Optional) Delay in seconds before the beacon is deactivated.