It does the following:

code:

---

// Desc: used to "tag" the last know target location
//       "CREATE <arrow.pcx>, MY.POS, _last_know_target_loc;"
function _last_know_target_loc()
{
	YOUR.ENTITY1 = ME;
	MY.INVISIBLE = ON;
	MY.PASSABLE = ON;
}

---

I don't understand what exactly is it doing or is supposed to do, in each case it doesn't do what I like to see.
But thanks anyway.