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-- Function to return true if a it's very likely a aircraft unit is currently in the air.
 -- takes in unit wrapper of unit to check
 function gKH.Unit:isAircraftAirborne(u)
     if ((u.condition_v == "Airborne") or u.condition_v == "RTB") or u.condition_V == "Landing_PreTouchdown" or
      u.condition_v == "ManoeuveringToRefuel" or u.condition_v == "Refuelling" or u.condition_v == "OffloadingFuel" or 
      u.condition_v == "DeployingDippingSonar" or u.condition_v == "EmergencyLanding" or  u.condition_v == "BVRAttack" or 
      u.condition_v == "BVRCrank" or u.condition_v == "Dogfight" or u.condition_v == "BVRDrag" or u.condition_v == "TransferringCargo" then
       return true;
     end
     return false;
   end
   

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  -- Function to return true if a it's very likely a ship\sub unit is docked at a port.
   -- takes in unit wrapper of unit to check
   -- does not account for edge cases where alt > 0 while in transition to port inside the override arcs of a port.
   function gKH.Unit:isShipSubAtDock(u)
     if (u.condition_v == "Docked" or u.altitude > 0.0) or u.condition_v == "Docking" or u.condition_v == "DeployingUnderway" then
       return true;
     end
     return false;
   end

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   -- Function to return true if a given unit wrapper currently contains the guid of a specific unit.
   -- Useful when checking if something is currently "at base" or not, and for other purposes.
   -- input u: The unit wrapper to check.
   -- input thetype: The string type unit to check "Aircraft or Boats".
   -- input theguid: The guid of the unit to search for.
   -- returns: true|false
   function gKH.Unit:checkForHostedUnitGuid(u,theType,theGuid)
     fn = "gKH.Unit:checkForHostedUnitGuid(): ";
     if (theType == nil) or type(theType) ~= "string" then theType = "Aircraft" end
     if (theGuid == nil) or type(theGuid) ~= "string" or string.len(theGuid) < 20 then print(fn .. "Missing guid. aborting."); return false; end
     if(u~=nil) then 
       local tmptable;
       if (u.embarkedUnits ~= nil) and theType == "Aircraft" then
         tmptable = u.embarkedUnits.Aircraft;
       elseif (u.embarkedUnits ~= nil) and theType == "Boats" then
         tmptable = u.embarkedUnits.Boats;
       else
         print(fn .. "Could not determine search type, try Aircraft or Boats. Aborting.")
         return false;
       end

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       if (tmptable ~=nil ) and #tmptable > 0 then
         for k = 1, #tmptable do
           if(tmptable[k] == theGuid) then return true; end --found match
         end
       else
           return false; -- no units to check.
       end
       return false; -- checked but no matches.
     else
       print(fn .. "Error: Unit wrapper missing, returning false")
       return false;
     end
   end
 

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 local unit;
 for i=1,16 do  --do the following 16 times incrementing i during each iteration.
   unit = ScenEdit_GetUnit({side='Redland',name='Sting #'..i})
   if unit ~= nil then
     local newfuel = unit.fuel --get a copy of the fuel table.
     for k,v in pairs(newfuel) do -- check ever single fuel entry.
       if (v.current / v.max) <= 50.0 then -- just an example if less then 50% then refuel.
          v.current = v.max -- update our copy's current property to be that of the max value.
          unit.fuel = newfuel --replace old fuel table with new data. 
       end
     end
   else 
     --print('could not find or get unit. ' .. 'Sting #'..i)
   end
   unit = nil;
 end